Question 1: A patient requires a myelogram. Which position is typically used for subarachnoid injection at the lumbar cistern (L4-L6)?

• Lateral recumbency with the spine flexed (Correct answer)
• Dorsal recumbency with hindlimbs extended
• Sternal recumbency with the head elevated
• Standing with the back arched

Correct answer: Lateral recumbency with the spine flexed

Lateral recumbency with the spine flexed opens the intervertebral spaces, facilitating accurate needle placement into the subarachnoid space at L4-L6.

Question 2: During a splenectomy, the scrub technician should be prepared to assist with ligation of which primary vessel?

• Celiac trunk only
• Renal artery
• Splenic artery and vein (Correct answer)
• Portal vein

Correct answer: Splenic artery and vein

The splenic artery and vein must be ligated and divided to remove the spleen safely during a splenectomy.

Question 3: Which one of the following effectively disinfects surfaces?

• 1.6% solution of sodium hypochlorite
• 1:32 dilution of 5.25% solution of sodium hypochlorite
• 1:5 dilution of 5.25% solution of sodium hypochlorite
• 5.25% solution of sodium hypochlorite (Correct answer)

Correct answer: 5.25% solution of sodium hypochlorite

Cleaning the surface thoroughly is a prerequisite for effective surface disinfection. The surface disinfectant should also sufficiently cover the surface and remain in touch with it for an appropriate amount of time. Bleach's active ingredient, sodium hypochlorite, offers the best disinfection at 0.16% solution concentration. A 5.25% solution is diluted to a 1:32 dilution to get a 0.16% solution. Parvovirus, along with other bacteria and viruses, can be effectively treated with diluted sodium hypochlorite or bleach solutions.

Question 4: Which drug class is commonly used to reverse the effects of benzodiazepine sedation in veterinary patients?

• Benzodiazepine antagonists (Correct answer)
• Anticholinergics
• Alpha-2 antagonists
• Opioid antagonists

Correct answer: Benzodiazepine antagonists

Flumazenil is a benzodiazepine antagonist used to reverse the effects of diazepam and midazolam.

Question 5: The term 'regenerative anemia' in veterinary hematology means the bone marrow is responding by releasing:

• Immature red blood cells (reticulocytes) (Correct answer)
• Eosinophils into circulation
• Mature neutrophils in excess
• Platelets at an accelerated rate

Correct answer: Immature red blood cells (reticulocytes)

In regenerative anemia, the bone marrow releases reticulocytes (immature RBCs) into circulation as a compensatory response to RBC loss or destruction.

Question 6: On an ultrasound of the canine abdomen, which structure typically appears as a hyperechoic line with acoustic shadowing in the right cranial abdomen?

• Gas within the duodenum (Correct answer)
• The gallbladder wall
• The right kidney cortex
• The portal vein wall

Correct answer: Gas within the duodenum

Gas within the duodenal lumen produces a hyperechoic interface with dirty acoustic shadowing, a normal finding that can limit visualization of structures behind it.

Question 7: What is the purpose of performing a 'leak test' on an anesthesia machine before use?

• To detect any leaks in the breathing circuit that could expose staff or patients to waste gas (Correct answer)
• To confirm CO2 absorbent is functional
• To calibrate the oxygen flow meter
• To verify vaporizer agent concentration

Correct answer: To detect any leaks in the breathing circuit that could expose staff or patients to waste gas

A leak test identifies holes or disconnections in the breathing circuit that could reduce delivered anesthetic concentration and expose personnel to waste anesthetic gases.

Question 8: What is the recommended minimum number of days that surgical instruments should be kept dry after autoclaving before being considered sterile and ready for use in event-related sterility?

• 7 days
• 30 days
• Sterility is event-related, not time-related, so no minimum days apply (Correct answer)
• 1 day

Correct answer: Sterility is event-related, not time-related, so no minimum days apply

Modern sterility standards are event-related, meaning a package remains sterile until an event (damage, moisture, opening) compromises it.

Question 9: A radiograph of a dog's abdomen reveals a 'string of pearls' gas pattern in the small intestine. This is most consistent with:

• Free abdominal air from perforation
• Colonic dilation due to megacolon
• Mechanical small intestinal obstruction (Correct answer)
• Normal bowel gas distribution

Correct answer: Mechanical small intestinal obstruction

A 'string of pearls' pattern occurs when small gas bubbles are trapped between folds in an obstructed, fluid-filled small intestine, indicating mechanical obstruction.

Question 10: In diagnostic radiography, what is the primary purpose of collimating the x-ray beam to the specific area of interest?

• To magnify the anatomical structures for better visualization.
• To decrease the required exposure time (seconds).
• To increase the radiographic density (blackness) of the image.
• To reduce scatter radiation and improve both image quality and safety. (Correct answer)

Correct answer: To reduce scatter radiation and improve both image quality and safety.

Collimating, or narrowing, the primary x-ray beam to the area of interest is a crucial safety measure that adheres to the ALARA (As Low As Reasonably Achievable) principle. It limits the patient's radiation exposure to only the necessary region and reduces the amount of scatter radiation produced. Less scatter improves image contrast and reduces radiation exposure for veterinary personnel present.

Question 11: What is the purpose of preoxygenation before anesthetic induction in dogs and cats?

• To increase tidal volume during induction
• To prevent the need for endotracheal intubation
• To extend the time before oxygen desaturation occurs if intubation is difficult (Correct answer)
• To reduce the dose of induction agent needed

Correct answer: To extend the time before oxygen desaturation occurs if intubation is difficult

Preoxygenation denitrogenates the functional residual capacity, increasing oxygen reserves and providing extra time for safe intubation before desaturation.

Question 12: What does the abbreviation 'SQ' or 'SC' indicate on a prescription label?

• Slowly and carefully
• Sub-cardiac administration
• Sublingual route of administration
• Subcutaneous route of administration (Correct answer)

Correct answer: Subcutaneous route of administration

SQ or SC stands for subcutaneous, meaning the drug is administered into the tissue beneath the skin.

Question 13: Which breathing system is MOST appropriate for patients weighing less than 7 kg due to its low resistance and minimal rebreathing?

• Large animal circle system
• Circle rebreathing system
• Mapleson F (Norman Elbow) system (Correct answer)
• To-and-fro system

Correct answer: Mapleson F (Norman Elbow) system

The Mapleson F system (Norman Elbow/Bain modification) is preferred for small patients because it offers low resistance and reduces rebreathing without requiring a CO2 absorber.

Question 14: What is the recommended technique to confirm correct placement of a nasogastric tube before feeding?

• Auscultate the abdomen while injecting air
• Measure the tube length from nose to stomach
• Obtain a lateral thoracic/abdominal radiograph (Correct answer)
• Check for tube condensation during exhalation

Correct answer: Obtain a lateral thoracic/abdominal radiograph

A lateral radiograph is the gold-standard method to confirm NG tube placement, verifying the tube tip is in the stomach rather than accidentally in the trachea or esophagus.

Question 15: A surgeon requests a non-absorbable, monofilament suture for skin closure on a cat, which will need to be removed in 10-14 days. Which of the following suture materials best fits this description?

• Surgical Gut (Chromic)
• Polyglactin 910 (e.g., Vicryl)
• Polydioxanone (e.g., PDS)
• Nylon (e.g., Ethilon) (Correct answer)

Correct answer: Nylon (e.g., Ethilon)

Nylon is a synthetic, non-absorbable monofilament suture commonly used for skin closure that requires later removal. Polyglactin 910 and Polydioxanone are both absorbable synthetic sutures, and Surgical Gut is an absorbable natural suture.

Question 16: Which radiographic sign indicates free gas in the peritoneal cavity (pneumoperitoneum)?

• Dilated fluid-filled loops of intestine
• Serosal detail loss
• Uniform increased abdominal opacity
• Gas opacity between the liver and diaphragm on a standing lateral or DV view (Correct answer)

Correct answer: Gas opacity between the liver and diaphragm on a standing lateral or DV view

Free peritoneal gas rises to the highest point and is visible as a radiolucent stripe between the liver and diaphragm on a standing lateral or horizontal-beam view.

Question 17: A client calls the clinic in a panic, stating they accidentally gave their cat a double dose of its prescribed medication. Which of the following is the most appropriate initial action for the veterinary technician?

• Reassure the owner that a single double dose is unlikely to cause harm.
• Obtain the drug name and concentration, and notify the veterinarian immediately. (Correct answer)
• Advise the owner to induce vomiting immediately.
• Instruct the owner to monitor for any adverse effects and call back if they occur.

Correct answer: Obtain the drug name and concentration, and notify the veterinarian immediately.

The technician's primary role is to gather essential information and alert the veterinarian. The veterinarian will then determine the risk and provide appropriate medical advice. Technicians should not give medical advice, such as inducing vomiting, without direct orders from a veterinarian, as it could be contraindicated.

Question 18: Which of the following correctly describes the purpose of a surgical lavage during an abdominal procedure?

• To cool the abdominal organs during prolonged surgery
• To hydrate the patient intraoperatively
• To irrigate the abdominal cavity to dilute and remove contamination (Correct answer)
• To test for intestinal leaks post-anastomosis

Correct answer: To irrigate the abdominal cavity to dilute and remove contamination

Surgical lavage uses warm sterile saline to dilute bacteria and debris from the abdominal cavity, reducing the risk of septic peritonitis.

Question 19: When performing a fecal flotation, which of the following solutions is commonly used because its specific gravity allows most common parasite eggs to float while causing heavier debris to sink?

• Sodium hypochlorite
• Distilled water
• 70% Isopropyl alcohol
• Sodium Nitrate (Correct answer)

Correct answer: Sodium Nitrate

Fecal flotation solutions, such as sodium nitrate, zinc sulfate, or sugar solutions, are designed to have a specific gravity (typically 1.18-1.27) that is higher than that of most parasite ova but lower than that of fecal debris. This density difference allows the eggs to float to the surface for collection and identification. Distilled water is not dense enough, and alcohol and hypochlorite are not used for this purpose.

Question 20: Which of the following is a correct aseptic technique when opening a sterile package onto the sterile field?

• Reach across the sterile field to place the item
• Peel back the wrapper and flip the item onto the field without touching the sterile interior (Correct answer)
• Drop the item from 12 inches above the field
• Place the entire package on the field and let the scrub tech open it

Correct answer: Peel back the wrapper and flip the item onto the field without touching the sterile interior

The circulating nurse peels back the outer wrapper and presents or drops the sterile item onto the field without touching the sterile interior or reaching over the field.

Question 21: A patient weighing 22 lbs is prescribed 0.5 mg/kg of a drug IM. The drug concentration is 10 mg/mL. How many mL should be administered?

• 0.05 mL
• 5.0 mL
• 1.0 mL
• 0.5 mL (Correct answer)

Correct answer: 0.5 mL

22 lbs ÷ 2.2 = 10 kg; 10 kg × 0.5 mg/kg = 5 mg; 5 mg ÷ 10 mg/mL = 0.5 mL.

Question 22: When preparing a bone marrow aspirate for cytologic evaluation, which stain is routinely used?

• Sudan black B
• Gram stain
• Wright-Giemsa stain (Correct answer)
• Periodic acid-Schiff (PAS)

Correct answer: Wright-Giemsa stain

Wright-Giemsa stain is the standard stain for bone marrow cytology, allowing differentiation of erythroid, myeloid, and lymphoid cell lines.

Question 23: Which suture material is most appropriate for a contaminated wound closure where extended tensile strength and low tissue reactivity are needed?

• Polyglycolic acid (Dexon)
• Poliglecaprone (Monocryl)
• Gut (chromic catgut)
• Polydioxanone (PDS) (Correct answer)

Correct answer: Polydioxanone (PDS)

Polydioxanone (PDS) is a monofilament absorbable suture with low tissue reactivity and prolonged tensile strength, making it suitable for contaminated environments.

Question 24: What is the primary purpose of using a Romanowsky-type stain (e.g., Diff-Quik) on a blood smear?

• To measure hemoglobin concentration
• To identify antibiotic sensitivity
• To detect bacteria only
• To differentiate and identify blood cell types and morphology (Correct answer)

Correct answer: To differentiate and identify blood cell types and morphology

Romanowsky-type stains like Diff-Quik use methylene blue and eosin to distinguish and characterize leukocytes, erythrocytes, and platelets by color.

Question 25: Which of the following is a common, and potentially serious, class-wide side effect of non-steroidal anti-inflammatory drugs (NSAIDs) in dogs?

• Gastrointestinal ulceration (Correct answer)
• Iatrogenic hyperadrenocorticism
• Alopecia
• Polyuria and polydipsia

Correct answer: Gastrointestinal ulceration

NSAIDs work by inhibiting cyclooxygenase (COX) enzymes, which reduces the production of prostaglandins. While this decreases inflammation and pain, it also reduces the production of prostaglandins that protect the stomach and intestinal lining. This can lead to gastrointestinal irritation, ulceration, and even perforation, which is a major risk associated with NSAID use.

Question 26: During mask induction in a dog, the patient suddenly becomes apneic. What is the FIRST action the veterinary technician should take?

• Intubate and provide IPPV (Correct answer)
• Remove the mask and allow recovery
• Administer doxapram IV
• Increase isoflurane concentration

Correct answer: Intubate and provide IPPV

When apnea occurs during induction, the airway should be secured immediately with intubation and intermittent positive pressure ventilation initiated.

Question 27: A 5-kg cat is anesthetized using a non-rebreathing circuit. Fifteen minutes into the procedure, the technician notes the patient's rectal temperature has dropped significantly. Which factor is the most likely primary contributor to this rapid heat loss?

• The administration of an opioid as a premedication.
• The thermal conductivity of the stainless steel surgical table.
• The clipping of the patient's fur for the surgical prep.
• The high flow rate of cool, dry gas required by the circuit. (Correct answer)

Correct answer: The high flow rate of cool, dry gas required by the circuit.

Non-rebreathing circuits require high fresh gas flow rates to flush out exhaled carbon dioxide. This high flow of un-warmed, non-humidified gas from the oxygen source causes significant evaporative and convective heat loss from the patient's respiratory tract, making it a primary contributor to perioperative hypothermia, especially in small patients.

Question 28: On an ultrasound exam, a structure that contains no internal echoes and has acoustic enhancement (brighter area behind it) is described as:

• Anechoic with posterior acoustic enhancement (Correct answer)
• Isoechoic
• Hyperechoic
• Heterogeneous

Correct answer: Anechoic with posterior acoustic enhancement

An anechoic structure (no internal echoes, appearing black) with posterior acoustic enhancement indicates a fluid-filled lesion such as a cyst, as fluid transmits sound without attenuation.

Question 29: Which chemistry value would you expect to be ELEVATED in a patient with cholestasis?

• Alkaline phosphatase (ALP) (Correct answer)
• Glucose
• BUN
• Creatinine

Correct answer: Alkaline phosphatase (ALP)

ALP is an enzyme that leaks from biliary epithelial cells during cholestasis, making it a key marker of bile duct obstruction or hepatobiliary disease.

Question 30: When assessing periodontal disease staging in veterinary patients, which factor is most critical to evaluate?

• Periodontal pocket depth and attachment loss (Correct answer)
• Enamel thickness
• Tooth shape
• Crown color

Correct answer: Periodontal pocket depth and attachment loss

Periodontal pocket depth and the degree of attachment loss are the primary criteria used to stage periodontal disease severity (PD1–PD4).

Question 31: When performing an upper GI series with barium in cats, contrast should reach the colon within approximately:

• 1–2 hours
• 15–30 minutes
• 3–5 hours (Correct answer)
• 6–8 hours

Correct answer: 3–5 hours

In cats barium typically reaches the colon within 3–5 hours under normal GI transit; slower transit may indicate obstruction, ileus, or motility disorder.

Question 32: A cat receiving a blood transfusion suddenly develops facial swelling and vomiting. The immediate action should be:

• Slow the transfusion rate by 50%
• Stop the transfusion immediately (Correct answer)
• Administer diphenhydramine and continue
• Continue monitoring without intervention

Correct answer: Stop the transfusion immediately

Acute transfusion reactions require immediate cessation of the transfusion to prevent life-threatening anaphylaxis or hemolysis.

Question 33: When taking a radiograph of a rabbit's skull, which positioning is MOST important for a true lateral view?

• Angling the beam 20° caudally
• Placing the rabbit in sternal recumbency
• Using high kVp to penetrate the dense skull
• Ensuring both tympanic bullae are superimposed (Correct answer)

Correct answer: Ensuring both tympanic bullae are superimposed

True lateral skull positioning requires both tympanic bullae to be superimposed; any rotation will separate them and distort assessment of the nasal passages, teeth, and bullae.

Question 34: According to the DEA, a drug like ketamine, which has an accepted medical use but also a potential for abuse, is classified under which schedule?

• Schedule III (Correct answer)
• Schedule V
• Schedule I
• Schedule II

Correct answer: Schedule III

Ketamine is classified as a Schedule III controlled substance. These drugs have a moderate to low potential for physical and psychological dependence and are used in medical practice. Schedule II drugs (like pure opioids) have a high potential for abuse, and Schedule I drugs have no currently accepted medical use.

Question 35: What is the term for the feline condition involving progressive destruction of tooth structure at or below the gumline?

• Feline stomatitis
• Feline enamel hypoplasia
• Feline periodontitis
• Feline odontoclastic resorptive lesion (FORL) (Correct answer)

Correct answer: Feline odontoclastic resorptive lesion (FORL)

Feline odontoclastic resorptive lesions (FORLs), also called tooth resorption, are characterized by progressive destruction of tooth structure caused by odontoclast activity.

Question 36: What does the term 'aseptic technique' mean in the context of veterinary surgery?

• Using only chemical disinfectants rather than steam sterilization
• Using gloves and mask only during wound closure
• Sterilizing all instruments before each use
• Practices that prevent the introduction of microorganisms into a sterile field (Correct answer)

Correct answer: Practices that prevent the introduction of microorganisms into a sterile field

Aseptic technique encompasses all practices designed to prevent microbial contamination of the surgical site and sterile field.

Question 37: A dog is prescribed metronidazole 15 mg/kg PO BID. The dog weighs 22 lbs. How many milligrams per dose should be administered?

• 100 mg
• 150 mg (Correct answer)
• 250 mg
• 200 mg

Correct answer: 150 mg

22 lbs ÷ 2.2 = 10 kg; 10 kg × 15 mg/kg = 150 mg per dose.

Question 38: A dog's packed cell volume (PCV) is 18%. This result indicates:

• Anemia (Correct answer)
• Dehydration artifact
• Normal PCV
• Polycythemia

Correct answer: Anemia

The normal canine PCV is 37–55%; a value of 18% is well below this range and indicates significant anemia.

Question 39: A veterinary technician notices that a sterile instrument tray was opened on the back table and then left unattended for 45 minutes while the team attended to a patient emergency. What should be done?

• Cover the tray with a sterile drape and use it immediately
• Re-sterilize only the instruments that were near the edge of the field
• Consider the field contaminated and re-sterilize or replace all items (Correct answer)
• Use the tray if it was not touched during the waiting period

Correct answer: Consider the field contaminated and re-sterilize or replace all items

An unattended sterile field cannot be guaranteed to remain sterile; all items must be considered contaminated and replaced before surgery proceeds.

Question 40: A 7-year-old Doberman Pinscher presents for collapse. An ECG reveals a heart rate of 180 bpm with wide, bizarre QRS complexes that do not have associated P waves. This arrhythmia is best identified as:

• Sinus tachycardia
• Third-degree AV block
• Ventricular tachycardia (Correct answer)
• Atrial fibrillation

Correct answer: Ventricular tachycardia

Ventricular tachycardia (V-tach) is a life-threatening arrhythmia characterized by a rapid heart rate originating from an ectopic focus within the ventricles. The classic ECG findings are a rapid rate with wide and bizarrely shaped QRS complexes and a lack of association with P waves (AV dissociation).

Question 41: An 8-year-old Poodle with a history of congestive heart failure and a significant heart murmur is scheduled for a mass removal. According to the American Society of Anesthesiologists (ASA) physical status classification system, which grade is most appropriate for this patient?

• ASA II
• ASA V
• ASA IV (Correct answer)
• ASA I

Correct answer: ASA IV

The ASA physical status classification system grades a patient's pre-anesthetic risk. An ASA IV classification is for a patient with severe systemic disease that is a constant threat to life. A dog with decompensated heart disease fits this category, signifying a high anesthetic risk that requires advanced planning and monitoring.

Question 42: A 6-year-old Dachshund presents with acute hindlimb paralysis. The veterinarian suspects intervertebral disc disease (IVDD) and needs to visualize the spinal cord and surrounding soft tissues for evidence of compression. Which advanced imaging modality is most appropriate for this purpose?

• Nuclear Scintigraphy
• Computed Tomography (CT)
• Fluoroscopy
• Magnetic Resonance Imaging (MRI) (Correct answer)

Correct answer: Magnetic Resonance Imaging (MRI)

Magnetic Resonance Imaging (MRI) provides superior soft tissue contrast and detail compared to other imaging modalities. It is the gold standard for diagnosing conditions involving the brain and spinal cord, such as intervertebral disc disease, because it can clearly visualize the spinal cord, nerve roots, and the compressing disc material.

Question 43: When performing a bone marrow biopsy cytology evaluation, a myeloid:erythroid (M:E) ratio greater than 3:1 suggests:

• Granulocytic hyperplasia or erythroid hypoplasia (Correct answer)
• Erythroid hyperplasia
• Megakaryocyte hypoplasia
• Pure red cell aplasia

Correct answer: Granulocytic hyperplasia or erythroid hypoplasia

A high M:E ratio (>3:1) indicates either increased granulocytic production (e.g., infection, inflammation) or decreased erythroid production.

Question 44: A cat presents with an open-mouth breathing pattern, cyanotic mucous membranes, and muffled heart and lung sounds on auscultation. A thoracic FAST scan reveals a large volume of pleural effusion. The veterinarian will likely perform which of the following emergency procedures to stabilize the patient?

• Thoracocentesis (Correct answer)
• Tracheostomy
• Abdominocentesis
• Pericardiocentesis

Correct answer: Thoracocentesis

Thoracocentesis is the procedure of draining fluid or air from the pleural space (the space surrounding the lungs). In a patient with significant pleural effusion causing respiratory distress, this procedure is both diagnostic and therapeutic, as it removes the fluid that is compressing the lungs and preventing them from expanding fully.

Question 45: A patient undergoing abdominal surgery has a heart rate of 140 bpm and pale mucous membranes. The FIRST priority action by the veterinary technician is to:

• Alert the surgeon and prepare IV fluids (Correct answer)
• Reposition the patient
• Increase the anesthetic depth
• Apply warming blankets

Correct answer: Alert the surgeon and prepare IV fluids

Tachycardia with pale mucous membranes suggests hemorrhagic shock, requiring immediate communication with the surgeon and fluid resuscitation.

Question 46: A lateral skull radiograph of a cat shows lysis of the tympanic bullae with soft tissue opacity filling the bulla. The most likely diagnosis is:

• Temporomandibular joint ankylosis
• Otitis media/interna with bulla involvement (Correct answer)
• Nasopharyngeal polyp without bony changes
• Feline acromegaly

Correct answer: Otitis media/interna with bulla involvement

Lysis of the tympanic bulla combined with soft tissue opacity filling the bulla cavity is characteristic of chronic otitis media/interna with secondary osteomyelitis.

Question 47: What does a left shift on a CBC indicate?

• Shift of red blood cells to the left side of the smear
• Decreased platelet count
• Increased mature lymphocytes in circulation
• Presence of immature neutrophils (bands) in peripheral blood (Correct answer)

Correct answer: Presence of immature neutrophils (bands) in peripheral blood

A left shift refers to the release of immature neutrophils (band cells and earlier forms) into the circulation, suggesting significant demand or bone marrow response.

Question 48: The normal capillary refill time (CRT) in a healthy dog or cat is:

• 3–4 seconds
• Greater than 4 seconds
• 2–3 seconds
• Less than 2 seconds (Correct answer)

Correct answer: Less than 2 seconds

A CRT of less than 2 seconds indicates adequate peripheral perfusion in dogs and cats.

Question 49: Which electrolyte abnormality is most commonly associated with urethral obstruction in cats?

• Hypokalemia
• Hypernatremia
• Hyperkalemia (Correct answer)
• Hypochloremia

Correct answer: Hyperkalemia

Urethral obstruction causes post-renal azotemia and inability to excrete potassium, leading to life-threatening hyperkalemia that can cause cardiac arrhythmias.

Question 50: Which of the following is NOT a clause in the code of ethics for veterinary technicians?

• “Veterinary technicians shall remain competent through commitment to life-long learning.”
• “Veterinary technicians shall assume accountability for their professional actions as well as those with whom they work.” (Correct answer)
• “Veterinary technicians shall represent their credentials or identify themselves with specialty organizations only if the designation has been awarded or earned.”
• “Veterinary technicians shall safeguard the public and the profession against individuals deficient in professional competence or ethics.”

Correct answer: “Veterinary technicians shall assume accountability for their professional actions as well as those with whom they work.”

The obligations, ethical responsibilities, and ideals of veterinary technicians are covered in full in the NAVTA Veterinary Technician Code of Ethics. The NAVTA Ethics Committee created the eleven statements that make up the Code of Ethics. Correctly translated, the sentence says, "Veterinary technicians shall assume accountability for individual professional actions and judgments."

Question 51: In ultrasound physics, 'resolution' refers to the ability to distinguish two structures as separate. Which type of resolution is MOST affected by transducer frequency?

• Lateral resolution
• Temporal resolution
• Contrast resolution
• Axial resolution (Correct answer)

Correct answer: Axial resolution

Axial resolution (along the beam axis) is determined by pulse length and wavelength, both of which improve with higher transducer frequency, allowing finer discrimination along the beam path.

Question 52: When placing an indwelling urinary catheter in a male dog, the catheter tip should be advanced until it reaches the:

• Prostate
• Ureter
• Urinary bladder (Correct answer)
• Proximal urethra only

Correct answer: Urinary bladder

The catheter must reach the urinary bladder to allow complete urine drainage and accurate sample collection.

Question 53: What does a PaO2 of 60 mmHg indicate in a patient breathing 100% oxygen?

• Mild hypoxemia
• Acceptable for induction
• Severe respiratory impairment (Correct answer)
• Normal oxygenation

Correct answer: Severe respiratory impairment

A PaO2 of 60 mmHg while breathing 100% oxygen indicates severe pulmonary dysfunction, as a normal patient should achieve PaO2 values of 450–600 mmHg.

Question 54: Electrosurgery units use which mechanism to cut or coagulate tissue?

• Ultrasonic vibration
• Direct electrical current causing muscle contraction
• Laser photoablation
• High-frequency alternating electrical current generating heat (Correct answer)

Correct answer: High-frequency alternating electrical current generating heat

Electrosurgical units pass high-frequency alternating current through tissue, generating heat that cuts or coagulates depending on waveform and power settings.

Question 55: Which electrolyte imbalance is most commonly associated with urethral obstruction in cats?

• Hypomagnesemia
• Hypocalcemia
• Hyponatremia
• Hyperkalemia (Correct answer)

Correct answer: Hyperkalemia

Urethral obstruction prevents potassium excretion, leading to life-threatening hyperkalemia that can cause cardiac arrhythmias.

Question 56: A cat recovering from an ovariohysterectomy is shivering and has a rectal temperature of 96°F (35.6°C). The BEST immediate intervention is:

• Apply active external warming and monitor temperature every 5 minutes (Correct answer)
• Administer corticosteroids
• Administer a bolus of cold saline
• Increase IV fluid rate to 20 mL/kg/hr

Correct answer: Apply active external warming and monitor temperature every 5 minutes

Hypothermia is common post-operatively in cats; active warming with warm water blankets or forced-air warmers and frequent temperature monitoring is the correct response.

Question 57: Which of the following best describes the term 'window width' in CT image display?

• The field of view diameter during image acquisition
• The range of Hounsfield units displayed as shades of gray (Correct answer)
• The brightness of the monitor displaying the image
• The slice thickness selected for reconstruction

Correct answer: The range of Hounsfield units displayed as shades of gray

Window width determines the range of HU values mapped to the grayscale display; a narrow window increases contrast while a wide window shows a broader range of densities.

Question 58: Which inhalant anesthetic has the highest blood:gas partition coefficient among those commonly used?

• Desflurane
• Isoflurane
• Sevoflurane
• Halothane (Correct answer)

Correct answer: Halothane

Halothane has the highest blood:gas partition coefficient (~2.4) among common inhalants, resulting in slower induction and recovery compared to newer agents.

Question 59: Fluoroscopy is most appropriate for evaluating which of the following conditions?

• Static cardiac chamber dimensions
• Real-time swallowing function (esophagram) (Correct answer)
• Bone density and cortical integrity
• Renal cortical thickness

Correct answer: Real-time swallowing function (esophagram)

Fluoroscopy provides real-time dynamic imaging, making it ideal for evaluating swallowing mechanics, esophageal motility, and contrast agent movement through the GI tract.

Question 60: A 2-year-old cat is recovering from an ovariohysterectomy. The owner calls the clinic 24 hours post-operatively, concerned that the cat is very quiet and has not eaten. The technician's most appropriate advice is to:

• Advise the owner to force-feed the cat a small amount of food.
• Suggest administering an over-the-counter pain medication to stimulate appetite.
• Tell the owner this is a sign of a serious complication and to come in immediately.
• Reassure the owner that mild lethargy and a decreased appetite are normal for the first 24-48 hours and to continue monitoring. (Correct answer)

Correct answer: Reassure the owner that mild lethargy and a decreased appetite are normal for the first 24-48 hours and to continue monitoring.

It is common for pets to be lethargic, quiet, and have a reduced appetite for the first 24-48 hours following surgery and anesthesia. Reassuring the client and advising continued monitoring is the best initial step. Force-feeding can cause aspiration or food aversion. While complications are possible, this scenario is not immediately indicative of a serious problem requiring an emergency visit. Technicians should never advise over-the-counter medications without veterinary approval.

Question 61: Which suture pattern is most appropriate for closing a hollow viscus such as the intestine to create an inverting seal?

• Lembert (Correct answer)
• Ford interlocking
• Cruciate
• Simple interrupted

Correct answer: Lembert

The Lembert pattern is an inverting suture used on hollow organs like the intestine to create a watertight seal.

Question 62: When using an automated cell counter, which parameter is most commonly falsely elevated by platelet clumping?

• White blood cell count (Correct answer)
• Red blood cell count
• Mean corpuscular volume (MCV)
• Platelet count

Correct answer: White blood cell count

Platelet clumps are counted as white blood cells by impedance-based analyzers because their combined size falls within the WBC detection threshold, falsely elevating the WBC count.

Question 63: Which test is the gold standard for confirming hypothyroidism in dogs?

• T3 suppression test
• TSH stimulation test
• Free T4 by equilibrium dialysis (fT4ed) (Correct answer)
• Total T4 (tT4) by RIA

Correct answer: Free T4 by equilibrium dialysis (fT4ed)

Free T4 by equilibrium dialysis is considered the most accurate single test for diagnosing canine hypothyroidism because it is unaffected by binding protein changes and euthyroid sick syndrome.

Question 64: When reading a urine dipstick result for protein, which sample characteristic can cause a false-positive reaction?

• Highly alkaline urine (pH > 8) (Correct answer)
• Yellow-colored urine
• Dilute urine (SG < 1.010)
• Presence of glucose

Correct answer: Highly alkaline urine (pH > 8)

Highly alkaline urine can cause false-positive protein results on dipstick because the colorimetric reaction is pH-dependent.

Question 65: In fluoroscopy, the unit of patient radiation dose most commonly monitored in real time is:

• HVL
• mAs
• kVp
• Air kerma (Gy) (Correct answer)

Correct answer: Air kerma (Gy)

Air kerma measured in Gray (Gy) is the standard real-time dose metric in fluoroscopy, often tracked at the reference point to estimate patient skin dose.

Question 66: A complete blood count (CBC) from an anemic dog is analyzed. Which finding on a Wright-Giemsa stained blood smear is the most definitive indicator of a regenerative bone marrow response?

• Occasional Howell-Jolly bodies
• Significant polychromasia (Correct answer)
• Numerous target cells (codocytes)
• Presence of spherocytes

Correct answer: Significant polychromasia

Polychromasia, the presence of bluish-red, larger-than-normal erythrocytes, is the hallmark of a regenerative anemia on a Wright-Giemsa smear. These cells are reticulocytes (immature red blood cells) that have been released early from the bone marrow to compensate for the anemia. Spherocytes suggest immune-mediated hemolysis, target cells can be seen in various conditions, and Howell-Jolly bodies are nuclear remnants that can be present in both regenerative and non-regenerative states.

Question 67: If a patient presented with dry and retracted eyes, dry mucous membranes, weak and rapid pulses, and a significant loss of skin turgor, at what percentage of interstitial dehydration would you estimate the patient to be?

• 4–5%
• 0–3%
• 8–10% (Correct answer)
• More than 11%

Correct answer: 8–10%

It is possible to estimate that a patient has 8–10% interstitial dehydration if they have dry and retracted eyes, dry mucous membranes, weak and fast pulses, and a considerable loss of skin turgor.

Question 68: Which of the following is a characteristic of absorbable suture material?

• It is never used for internal tissues
• It must be removed 10–14 days post-operatively
• It is always monofilament
• It loses tensile strength through enzymatic degradation or hydrolysis (Correct answer)

Correct answer: It loses tensile strength through enzymatic degradation or hydrolysis

Absorbable sutures lose tensile strength through hydrolysis or enzymatic degradation and do not require manual removal.

Question 69: On cytology, which cell type is predominant in a well-differentiated mast cell tumor aspirate?

• Epithelial cells in clusters
• Round cells with purple granules and a central nucleus (Correct answer)
• Spindle cells with intranuclear inclusions
• Lymphoblasts with scant cytoplasm

Correct answer: Round cells with purple granules and a central nucleus

Mast cells are round cells characterized by abundant purple (metachromatic) cytoplasmic granules surrounding a central to eccentric nucleus on Romanowsky-stained preparations.

Question 70: What is the primary safety concern when performing radiographs on a patient with suspected pneumothorax?

• Film fogging from oxygen lines
• Contrast medium reaction
• Radiation exposure to staff
• Patient positioning stress exacerbating dyspnea (Correct answer)

Correct answer: Patient positioning stress exacerbating dyspnea

Patients with pneumothorax are already dyspneic, and the stress and positioning required for radiography can worsen respiratory compromise or cause decompensation.

Question 71: A veterinary technician takes a thoracic radiograph of a dyspneic cat without sedation. The resulting image is blurry, and the cardiac silhouette and lung margins are indistinct. This loss of detail is most likely caused by which artifact?

• Motion artifact (Correct answer)
• Foreshortening
• Quantum mottle
• Grid lines

Correct answer: Motion artifact

Motion artifact is a common cause of blurry radiographs and loss of detail. It occurs when the patient moves during the X-ray exposure, which is particularly common in awake, panting, or dyspneic animals. This movement causes the anatomical structures to be recorded across a range of positions, resulting in a blurred image.

Question 72: A cat receives 0.01 mg/kg of buprenorphine. The cat weighs 4.5 kg. The concentration available is 0.3 mg/mL. How many mL should be given?

• 0.15 mL (Correct answer)
• 0.10 mL
• 0.25 mL
• 0.20 mL

Correct answer: 0.15 mL

4.5 kg × 0.01 mg/kg = 0.045 mg; 0.045 mg ÷ 0.3 mg/mL = 0.15 mL.

Question 73: A blood sample is hemolyzed when received at the laboratory. Which chemistry value is MOST likely to be falsely elevated due to hemolysis?

• Sodium
• Albumin
• Potassium (Correct answer)
• Total bilirubin

Correct answer: Potassium

Potassium is found in high concentrations inside red blood cells, so hemolysis releases intracellular potassium and artificially elevates serum potassium.

Question 74: Which of the following is a reversal agent for benzodiazepine sedation?

• Flumazenil (Correct answer)
• Yohimbine
• Naloxone
• Atipamezole

Correct answer: Flumazenil

Flumazenil competitively antagonizes benzodiazepine receptors and can reverse sedation caused by diazepam or midazolam.

Question 75: A male cat is straining repeatedly at the litter box but producing only a few drops of bloody urine. This presentation is most suspicious for:

• Urinary incontinence
• Polyuria from chronic kidney disease
• Urethral obstruction (Correct answer)
• Feline idiopathic cystitis without obstruction

Correct answer: Urethral obstruction

Urethral obstruction presents as repeated straining with little to no urine output and is a life-threatening emergency in male cats.

Question 76: Which post-operative complication is characterized by seroma of the subcutaneous space and fluctuant swelling at the incision site without heat or pain?

• Seroma formation (Correct answer)
• Surgical site infection
• Hematoma rupture
• Wound dehiscence

Correct answer: Seroma formation

A seroma is a collection of fluid (serum) in dead space under the incision; it presents as a soft, fluctuant, non-painful swelling without signs of infection.

Question 77: What is the primary purpose of a Penrose drain placed in a surgical wound?

• To deliver local antibiotics into the wound
• To maintain suture tension
• To allow passive drainage of fluid and exudate from a wound (Correct answer)
• To provide structural support to the incision

Correct answer: To allow passive drainage of fluid and exudate from a wound

A Penrose drain is a passive, open drain that allows fluid and exudate to exit a wound by capillary action and gravity.

Question 78: A veterinary technician produces a radiograph of a large dog's abdomen that appears gray and has very low contrast, obscuring detail. The patient measured 15 cm at the level of the umbilicus. Which of the following is the most likely cause and solution for this poor image quality?

• Scatter radiation; a grid should be used for the retake. (Correct answer)
• Motion artifact; the patient should be sedated for a retake.
• Underexposure; the milliamperage-seconds (mAs) should be increased.
• Foreshortening; the x-ray beam was not perpendicular to the cassette.

Correct answer: Scatter radiation; a grid should be used for the retake.

For body parts measuring 10 cm or greater in thickness, significant scatter radiation is produced, which degrades image quality by reducing contrast and creating a foggy appearance. Using a grid absorbs this scatter before it reaches the image receptor, resulting in a higher-contrast, more detailed image.

Question 79: A technician is monitoring an anesthetized ferret and notes that rectal temperature has dropped to 96°F (35.6°C). Which ACTIVE warming method is safest?

• Heat lamp placed 6 inches from the patient
• Warm water bottles filled with boiling water
• Electric heating pad set to high placed directly under the patient
• Warm water circulating blanket or forced warm-air blanket (Correct answer)

Correct answer: Warm water circulating blanket or forced warm-air blanket

Warm water circulating blankets and forced warm-air systems provide consistent, safe warming without the thermal burn risk associated with direct heat sources.

Question 80: Which drug is used to treat Giardia infections in dogs and cats?

• Fenbendazole (Correct answer)
• Praziquantel
• Epsiprantel
• Ivermectin

Correct answer: Fenbendazole

Fenbendazole (Panacur) is effective against Giardia and is commonly used in dogs and cats due to its safety and efficacy against this protozoan.

Question 81: Which ophthalmic drug class is used to treat glaucoma in dogs by reducing aqueous humor production?

• Mydriatics
• Corticosteroids
• Miotics
• Carbonic anhydrase inhibitors (Correct answer)

Correct answer: Carbonic anhydrase inhibitors

Carbonic anhydrase inhibitors (e.g., dorzolamide, brinzolamide) reduce aqueous humor production, lowering intraocular pressure in glaucoma.

Question 82: In urinalysis, the presence of bilirubin in a cat's urine is considered:

• Always abnormal and clinically significant (Correct answer)
• Normal up to 3+ in cats
• Only significant if accompanied by glucosuria
• Normal only in male cats

Correct answer: Always abnormal and clinically significant

Unlike dogs, cats have a very high renal threshold for bilirubin, so any bilirubinuria in cats is considered abnormal and clinically significant.

Question 83: Which of the following is an example of a compounded medication in veterinary medicine?

• A flavored liquid suspension made from a tablet for a cat that refuses pills (Correct answer)
• A human drug used at its human labeled dose in a dog
• An FDA-approved injectable solution drawn into a syringe
• A commercially available antibiotic tablet given at the labeled dose

Correct answer: A flavored liquid suspension made from a tablet for a cat that refuses pills

Compounding involves preparing a customized formulation (such as a flavored liquid) from an existing drug when a commercially suitable form is unavailable.

Question 84: Maropitant (Cerenia®) is a widely used antiemetic in veterinary medicine. It provides broad-spectrum anti-vomiting effects by acting as a:

• Serotonin 5-HT3 receptor antagonist
• Neurokinin-1 (NK-1) receptor antagonist (Correct answer)
• Histamine H1 receptor antagonist
• Dopamine D2 receptor antagonist

Correct answer: Neurokinin-1 (NK-1) receptor antagonist

Maropitant is a potent and selective antagonist of the Neurokinin-1 (NK-1) receptor. It works by blocking the binding of Substance P, a key neurotransmitter involved in the vomiting reflex, at the NK-1 receptors in the emetic center of the brain. This mechanism makes it effective against vomiting triggered by both central and peripheral stimuli.

Question 85: According to Drug Enforcement Administration rules, pentobarbital, fentanyl, and hydromorphone fall under which of the following categories of banned substances?

• Schedule II (Correct answer)
• Schedule I
• Schedule III
• Schedule IV

Correct answer: Schedule II

Morphine and other narcotics on Schedule II, such as hydromorphone, methadone, meperidine, oxycodone, and fentanyl, have a high potential for abuse and may cause severe psychological or physical dependence. In addition to stimulants, cocaine, amobarbital, glutethimide, and pentobarbital are all classified as schedule II controlled substances.

Question 86: Which controlled substance schedule includes drugs with accepted medical use but high potential for abuse, such as morphine?

• Schedule II (Correct answer)
• Schedule IV
• Schedule I
• Schedule III

Correct answer: Schedule II

Schedule II drugs have accepted medical use but a high potential for abuse and severe psychological or physical dependence.

Question 87: A cat receiving enrofloxacin at high doses is at risk for which serious adverse effect?

• Nephrotoxicity
• Bone marrow suppression
• Hepatotoxicity
• Retinal degeneration and blindness (Correct answer)

Correct answer: Retinal degeneration and blindness

High doses of enrofloxacin in cats can cause acute retinal degeneration leading to blindness due to fluoroquinolone toxicity specific to feline photoreceptors.

Question 88: What is the purpose of using the ALARA principle in veterinary radiology?

• To maximize image resolution at any radiation dose
• To standardize kVp and mAs across all patients
• To keep radiation exposure as low as reasonably achievable (Correct answer)
• To allow unrestricted radiographic studies without dose limits

Correct answer: To keep radiation exposure as low as reasonably achievable

ALARA (As Low As Reasonably Achievable) is the guiding radiation safety principle requiring minimization of exposure to patients, staff, and the environment while maintaining diagnostic image quality.

Question 89: A urine specific gravity of 1.045 in a dog most likely indicates:

• Diabetes insipidus
• Hyposthenuria
• Isosthenuria
• Concentrated urine with possible dehydration (Correct answer)

Correct answer: Concentrated urine with possible dehydration

A specific gravity of 1.045 is highly concentrated and may indicate dehydration or renal compensatory response in dogs.

Question 90: What is the MOST reliable indicator of adequate endotracheal tube cuff inflation without causing tracheal mucosal damage?

• Inflating until no resistance is felt with the syringe
• Inflating until a firm feel is palpated at the pilot balloon
• Inflating with exactly 5 mL of air regardless of tube size
• Using a manometer to maintain cuff pressure between 20–30 cm H2O (Correct answer)

Correct answer: Using a manometer to maintain cuff pressure between 20–30 cm H2O

A manometer ensures the cuff pressure stays in the 20–30 cm H2O range, preventing both aspiration (under-inflation) and tracheal ischemia (over-inflation).

Question 91: When performing an X-ray, what is considered the primary source of scatter radiation?

• The collimator assembly
• The patient's body (Correct answer)
• The digital detector or cassette
• The X-ray tube housing

Correct answer: The patient's body

The patient's body is the main source of scatter radiation. When the primary X-ray beam enters the patient's tissues, some photons are absorbed, some pass through to the detector, and others are scattered in various directions through an interaction known as the Compton effect. This scattered radiation reduces image contrast and is the primary source of radiation exposure to personnel in the room.

Question 92: Which of the following is a contraindication to the use of barium sulfate as a GI contrast agent?

• Megaesophagus
• Gastric foreign body
• Vomiting without suspected perforation
• Suspected esophageal or GI perforation (Correct answer)

Correct answer: Suspected esophageal or GI perforation

Barium leaking into the mediastinum or peritoneal cavity causes severe granulomatous inflammation and is potentially fatal; water-soluble contrast is used when perforation is suspected.

Question 93: What is the interradicular bone, and why is its integrity important in dental assessment?

• Bone adjacent to the periodontal ligament; measures root ankylosis
• Bone overlying the root tip; indicates root length
• Bone between the roots of multi-rooted teeth; loss indicates furcation involvement (Correct answer)
• The cortical plate of the jaw; fracture risk indicator

Correct answer: Bone between the roots of multi-rooted teeth; loss indicates furcation involvement

Interradicular bone lies between the roots of multi-rooted teeth, and its loss indicates furcation exposure (F1–F3), a key severity marker in periodontal disease.

Question 94: A veterinary technician uses a handheld refractometer to measure a patient's urine specific gravity. What is the underlying physical principle that allows this instrument to provide a measurement?

• The bending of light as it passes through a fluid containing dissolved solids. (Correct answer)
• The scattering of a light beam by suspended particles.
• The electrical impedance created as cells pass through an aperture.
• The absorption of specific light wavelengths by solutes.

Correct answer: The bending of light as it passes through a fluid containing dissolved solids.

A refractometer operates on the principle of light refraction. It measures the angle at which light bends as it passes from the air through the liquid sample (the refractive index). The concentration of dissolved solids in the fluid (like solutes in urine or proteins in plasma) determines the degree of this bending. The instrument's scale is calibrated to correlate this angle of refraction to a specific gravity or total protein value.

Question 95: During a barium upper GI series, transit time from stomach to ileocecal junction in a healthy dog should be approximately:

• 30–60 minutes
• 6–8 hours
• 5–15 minutes
• 1–3 hours (Correct answer)

Correct answer: 1–3 hours

In dogs, barium typically reaches the ileocecal junction within 1–3 hours of administration; prolonged transit may indicate ileus or obstruction.

Question 96: Which of the following should be mentioned as a crucial post-operative instruction after an ovariohysterectomy?

• Maximize movement to limit stiffness
• Return for intradermal suture removal in 5 days
• Directions for use of pain relief (Correct answer)
• Return for suture removal in 3 days

Correct answer: Directions for use of pain relief

Patients should be restrained from moving after an ovariohysterectomy to reduce pain and prevent pulling on the suture line and internal organs. Restriction is crucial for a few days after surgery, while at times being difficult. In addition to oral painkillers being sent home for use after surgery, injectable painkillers may be administered at the time of surgery. The dosage and administration of painkillers, as well as any possible adverse effects, must be completely understood by the client. In order to prevent the need for suture removal, the surgeon may utilize intradermal, subcuticular, or skin glue to close the wound. If skin sutures are used, they need to be taken out 7–10 days after surgery. Sutures can occasionally be taken off as soon as five days after surgery.

Question 97: The Baermann technique is a specialized fecal diagnostic test used to recover which of the following?

• Nematode eggs like Toxocara
• Tapeworm segments like Dipylidium
• Protozoan cysts like Giardia
• Nematode larvae like Aelurostrongylus (Correct answer)

Correct answer: Nematode larvae like Aelurostrongylus

The Baermann technique is specifically designed to recover live nematode larvae from a fresh fecal sample. It relies on the active migration of larvae out of the feces and into surrounding water. It is the preferred method for detecting lungworm larvae (e.g., Aelurostrongylus abstrusus) and other parasites that pass larvae instead of eggs in the stool.

Question 98: Which surgical instrument is specifically designed to crush and ligate blood vessels or tissue pedicles?

• Rochester-Carmalt forceps (Correct answer)
• Backhaus towel clamp
• Senn retractor
• Adson forceps

Correct answer: Rochester-Carmalt forceps

Rochester-Carmalt forceps have longitudinal serrations that crush and hold vascular pedicles (such as ovarian or uterine stumps) during ligation.

Question 99: An anesthetized patient's end-tidal CO2 (ETCO2) begins to rise and the inspiratory CO2 is also noted to be above zero. Which of the following is the most likely cause?

• Exhausted soda lime (Correct answer)
• Decreased cardiac output
• Hypothermia
• Anesthetic overdose

Correct answer: Exhausted soda lime

Exhausted soda lime in a rebreathing circuit can no longer absorb expired carbon dioxide. This leads to rebreathing of CO2, causing a rise in both inspiratory and end-tidal CO2 levels (hypercapnia).

Question 100: In digital radiography, what does the term 'exposure index' indicate?

• The kVp setting used during the exposure
• The total radiation dose delivered to the patient
• The number of exposures taken per study
• A measure of detector exposure level relative to optimal (Correct answer)

Correct answer: A measure of detector exposure level relative to optimal

The exposure index is a numeric value indicating whether the detector received too little (underexposure) or too much (overexposure) radiation relative to the system's calibrated target.

Question 101: A veterinary technician is performing a urinalysis and observes colorless, rectangular, prism-like crystals that resemble "coffin lids." These crystals are most likely:

• Struvite (Correct answer)
• Calcium oxalate dihydrate
• Cystine
• Ammonium biurate

Correct answer: Struvite

Struvite (magnesium ammonium phosphate) crystals are commonly described as resembling 'coffin lids' due to their colorless, three-dimensional, prism-like shape. While they can be found in normal dogs and cats, their formation is favored in neutral to alkaline urine and can be associated with urinary tract infections.

Question 102: Atropine is classified as which type of drug?

• Beta-1 adrenergic antagonist
• Nicotinic receptor agonist
• Alpha-2 adrenergic agonist
• Anticholinergic (muscarinic antagonist) (Correct answer)

Correct answer: Anticholinergic (muscarinic antagonist)

Atropine is an anticholinergic drug that competitively blocks muscarinic acetylcholine receptors, increasing heart rate and decreasing secretions.

Question 103: What is the primary purpose of using a Bain circuit during small animal anesthesia?

• To eliminate the need for a CO2 absorber in large animals
• To allow non-rebreathing with high fresh gas flows (Correct answer)
• To increase rebreathing of CO2
• To reduce oxygen consumption

Correct answer: To allow non-rebreathing with high fresh gas flows

The Bain circuit is a modified Mapleson D non-rebreathing system that uses high fresh gas flows to prevent CO2 rebreathing.

Question 104: Which component of the anesthetic machine is specifically designed to absorb exhaled carbon dioxide in a rebreathing circuit?

• The oxygen flowmeter
• The pop-off valve
• The vaporizer
• The soda lime canister (Correct answer)

Correct answer: The soda lime canister

The soda lime canister contains granules (such as soda lime or other absorbents) that chemically react with and remove carbon dioxide from the exhaled gases. This allows the patient to safely rebreathe the remaining gases, including oxygen and anesthetic vapor, conserving heat, moisture, and anesthetic agent.

Question 105: A fecal flotation using zinc sulfate solution is particularly useful for identifying:

• Nematode larvae
• Giardia cysts (Correct answer)
• Coccidia oocysts only
• Tapeworm proglottids

Correct answer: Giardia cysts

Zinc sulfate flotation (specific gravity ~1.18) is the preferred method for recovering Giardia cysts because it preserves cyst morphology better than sodium nitrate or sucrose solutions.

Question 106: A cat recovering from anesthesia develops laryngospasm upon extubation. What is the FIRST action the technician should take?

• Apply firm sternal pressure
• Administer atropine IM
• Administer succinylcholine IV
• Gently extend the neck and attempt oxygen supplementation; re-intubate if necessary (Correct answer)

Correct answer: Gently extend the neck and attempt oxygen supplementation; re-intubate if necessary

Gentle neck extension, oxygen supplementation, and re-intubation if the airway does not open are the immediate priorities for managing laryngospasm in cats.

Question 107: Which of the following is the correct sequence for donning sterile surgical gloves using the closed-glove technique?

• Hands remain inside the gown cuffs while gloves are applied (Correct answer)
• Gloves are applied after the gown cuffs are pulled back over the hands
• Gloves are applied before the gown, using bare hands
• Gloves are opened by the scrub tech and held for the surgeon

Correct answer: Hands remain inside the gown cuffs while gloves are applied

In the closed-glove technique, the hands never extend beyond the gown cuff, keeping the hands sterile as gloves are applied.

Question 108: How many mL of a 50% dextrose solution must be added to a 500 mL bag of 0.45% NaCl to make a 5% dextrose solution? (Presume that a comparable volume of the NaCl solution will be taken out before the dextrose is introduced.)

• 100%
• 50 mL (Correct answer)
• 5 mL
• 25 mL

Correct answer: 50 mL

Dextrose weighs 0.5 g per milliliter of 50% dextrose. 50 g of dextrose per liter, or 25 g per half liter, will be present in a 5% solution. The 500 mL bag of 0.45% NaCl will need to be converted to a 5% dextrose solution using 50 mL of the 50% dextrose in order to add 25 g to the solution. The bag should first have 50 mL of NaCl removed before dextrose is added in the appropriate quantity.

Question 109: Which of the following anesthetic induction agents is well-known for causing a transient period of apnea, especially when administered as a rapid intravenous bolus?

• Diazepam
• Tiletamine-zolazepam (Telazol®)
• Ketamine
• Propofol (Correct answer)

Correct answer: Propofol

Propofol is a rapid-acting injectable anesthetic that commonly causes dose- and rate-dependent respiratory depression, which can manifest as apnea immediately following induction. Technicians should be prepared to intubate and provide positive pressure ventilation if necessary after its administration.

Question 110: A dog is presented after being hit by a car. The technician notes a heart rate of 160 bpm, pale mucous membranes, and a capillary refill time of 3 seconds. Which stage of shock is this patient most likely exhibiting?

• Cardiogenic shock
• Compensatory shock
• Decompensated shock (Correct answer)
• Septic shock

Correct answer: Decompensated shock

These clinical signs—tachycardia, pale mucous membranes, and prolonged capillary refill time—are classic indicators of decompensated shock. The body's initial compensatory mechanisms (like increasing heart rate to maintain blood pressure) are starting to fail, leading to poor tissue perfusion.

Question 111: During anesthetic monitoring, a technician observes the jaw tone becoming very loose and the eye rotating ventrally. What plane of anesthesia does this indicate?

• Appropriate surgical plane (Correct answer)
• Light plane — increase anesthetic depth
• Dangerously deep plane — reduce anesthetic immediately
• Recovery phase

Correct answer: Appropriate surgical plane

In most species, ventral eye rotation combined with absent jaw tone and palpebral reflex indicates an appropriate surgical plane of anesthesia.

Question 112: A double-contrast gastrogram is performed by introducing iodinated contrast followed by air. The purpose of the air is to:

• Lower the risk of aspiration
• Dilute the iodinated contrast
• Distend the stomach lumen to coat the mucosal surface with contrast (Correct answer)
• Reduce peristalsis

Correct answer: Distend the stomach lumen to coat the mucosal surface with contrast

Air distends the stomach so that the positive contrast agent coats the mucosal folds, allowing mucosal detail and wall lesions (e.g., ulcers, masses) to be seen clearly.

Question 113: The preferred peripheral venipuncture site for IV catheter placement in dogs is the:

• Jugular vein
• Lateral saphenous vein
• Cephalic vein (Correct answer)
• Femoral vein

Correct answer: Cephalic vein

The cephalic vein on the forelimb is the most commonly used peripheral IV catheter site in dogs due to its accessibility and ease of restraint.

Question 114: Which of the following describes the Guedel classification Stage III, Plane 2 of anesthesia?

• Respiratory arrest with fixed dilated pupils
• Loss of consciousness with retained reflexes
• Surgical anesthesia with regular respiration and loss of palpebral reflex (Correct answer)
• Excitement, breath-holding, and struggling

Correct answer: Surgical anesthesia with regular respiration and loss of palpebral reflex

Stage III, Plane 2 represents surgical anesthesia characterized by regular respiration, loss of the palpebral reflex, and absent response to surgical stimulation.

Question 115: A 12-kg dog is prescribed carprofen for osteoarthritis at a dose of 2.2 mg/kg BID. The clinic stocks 50 mg scored tablets. How many tablets should be dispensed for a 10-day supply?

• 5 tablets
• 20 tablets
• 15 tablets
• 10 tablets (Correct answer)

Correct answer: 10 tablets

First, calculate the single dose in mg: 12 kg * 2.2 mg/kg = 26.4 mg. Since the tablets are 50 mg and scored, the dog will receive a half tablet (25 mg) per dose. The dosing is BID (twice a day), so the dog needs 2 doses per day. For a 10-day supply, the total number of doses is 2 doses/day * 10 days = 20 doses. Since each dose is a half tablet, the total number of tablets is 20 doses * 0.5 tablets/dose = 10 tablets.

Question 116: When calculating fluid therapy for a surgical patient, what is the standard intraoperative maintenance rate for a healthy dog?

• 5–10 mL/kg/hr (Correct answer)
• 1–2 mL/kg/hr
• 15–20 mL/kg/hr
• 25 mL/kg/hr

Correct answer: 5–10 mL/kg/hr

The standard intraoperative fluid rate for healthy dogs is 5–10 mL/kg/hr, adjusted for blood loss, hypotension, and individual patient factors.

Question 117: A sample requiring immediate serum separation should ideally be centrifuged within how many minutes of collection?

• 2 hours
• 30 minutes (Correct answer)
• 5 minutes
• 4 hours

Correct answer: 30 minutes

Serum should be separated from the clot within 30 minutes of collection to prevent analyte shifts (e.g., potassium leaking from RBCs, glucose consumption).

Question 118: Which of the following clinical findings is most consistent with the early, compensatory stage of shock in a dog?

• Bradycardia
• Prolonged capillary refill time (>2 seconds)
• Weak or absent peripheral pulses
• Tachycardia with bounding pulses (Correct answer)

Correct answer: Tachycardia with bounding pulses

In the early, compensatory stage of shock, the body attempts to maintain perfusion to vital organs. The sympathetic nervous system causes an increased heart rate (tachycardia) and increased cardiac contractility, which often results in strong or bounding pulses. Weak pulses and prolonged CRT are signs of later, decompensated shock.

Question 119: During an abdominal ultrasound, a structure appears completely black on the monitor, indicating that it is free of echoes. Which of the following terms correctly describes this appearance?

• Anechoic (Correct answer)
• Hyperechoic
• Isoechoic
• Hypoechoic

Correct answer: Anechoic

The term 'anechoic' literally means 'without echo.' On an ultrasound image, structures that allow sound waves to pass through them without reflection, such as simple fluid within the urinary bladder or a cyst, appear black.

Question 120: Which of the following accurately describes 'bioavailability'?

• Volume in which a drug is distributed in the body
• Fraction of administered drug that reaches systemic circulation unchanged (Correct answer)
• Rate of drug metabolism in the liver
• Ability of drug to cross the blood-brain barrier

Correct answer: Fraction of administered drug that reaches systemic circulation unchanged

Bioavailability refers to the proportion of a drug that enters the systemic circulation in its active form after administration.

Question 121: Which of the following best describes the role of a vaporizer in an anesthetic machine?

• It absorbs CO2 from exhaled gases
• It regulates oxygen flow from the tank
• It converts liquid anesthetic agent into a precise vapor concentration for delivery (Correct answer)
• It humidifies inspired gases to prevent airway drying

Correct answer: It converts liquid anesthetic agent into a precise vapor concentration for delivery

The vaporizer converts liquid inhalant anesthetic into a calibrated vapor concentration delivered to the patient via the breathing circuit.

Question 122: What shouldn't fluoroquinolones be used in?

• Older animals because they cause arthropathy
• Growing animals because they cause heart conduction disturbance
• Young animals because they cause arthropathy (Correct answer)
• Pregnant animals because they cause abortion

Correct answer: Young animals because they cause arthropathy

Chondrocytes are poisoned by fluoroquinolones. Vesicles are formed by damaged chondrocytes on the surfaces of joints. Arthritis damage from fluoroquinolones is more likely to occur at higher doses. Animals infected develop lameness.

Question 123: Which of the following describes the CORRECT order for donning sterile surgical attire?

• Mask then gloves then gown
• Cap then gown then gloves then mask
• Gloves then gown
• Gown then gloves (Correct answer)

Correct answer: Gown then gloves

Sterile gown is donned first, followed by sterile gloves, to maintain sterility of the gloved hands during the gloving process.

Question 124: Which suture pattern is most appropriate for closing a hollow viscus such as the intestine to create an inverting, leak-resistant closure?

• Cruciate
• Simple interrupted
• Ford interlocking
• Cushing (Correct answer)

Correct answer: Cushing

The Cushing pattern is an inverting suture used for hollow organs such as the intestine and stomach to create a secure, leak-resistant closure.

Question 125: During abdominal ultrasound, the spleen of a dog appears diffusely hyperechoic compared to the liver. This finding is MOST consistent with:

• Nodular hyperplasia or diffuse infiltrative disease (Correct answer)
• Acute splenic torsion
• Splenic congestion
• Normal finding

Correct answer: Nodular hyperplasia or diffuse infiltrative disease

A diffusely hyperechoic spleen relative to the liver is abnormal and most often associated with nodular hyperplasia, extramedullary hematopoiesis, or infiltrative neoplasia.

Question 126: Which anesthetic complication is MOST associated with brachycephalic breeds undergoing general anesthesia?

• Prolonged QT interval
• Hyperthermia
• Upper airway obstruction during recovery (Correct answer)
• Hypoglycemia

Correct answer: Upper airway obstruction during recovery

Brachycephalic breeds are predisposed to upper airway obstruction, especially during recovery, due to elongated soft palate, stenotic nares, and hypoplastic trachea.

Question 127: A sample for blood glucose measurement is collected in a gray-top tube. What additive does it contain?

• Sodium fluoride and potassium oxalate (Correct answer)
• Sodium citrate
• Lithium heparin
• EDTA and thrombin

Correct answer: Sodium fluoride and potassium oxalate

Gray-top tubes contain sodium fluoride (a glycolytic inhibitor) and potassium oxalate (an anticoagulant), preserving glucose levels for accurate measurement.

Question 128: What is the primary purpose of a sterile drape during surgery?

• To keep the patient warm
• To prevent the patient from moving
• To absorb blood and fluids
• To establish and maintain a sterile field around the incision site (Correct answer)

Correct answer: To establish and maintain a sterile field around the incision site

Sterile drapes demarcate and maintain the sterile field surrounding the incision, preventing contamination from nonsterile surfaces.

Question 129: What is the significance of a 'vaporizer out of circuit' (VOC) arrangement compared to a 'vaporizer in circuit' (VIC) arrangement?

• VOC vaporizers work only with ether
• VOC vaporizers deliver more precise, flow-independent concentrations (Correct answer)
• VIC vaporizers are safer for large animals
• VOC vaporizers require no carrier gas flow

Correct answer: VOC vaporizers deliver more precise, flow-independent concentrations

Out-of-circuit (VOC) vaporizers use a precision variable bypass design that delivers accurate agent concentrations independent of fresh gas flow rate.

Question 130: During anesthesia, a cat's respiratory rate drops to 4 breaths per minute. Which intervention is MOST appropriate?

• Assist or control ventilation manually (Correct answer)
• Administer atropine IV
• Administer doxapram IV
• Increase the vaporizer setting

Correct answer: Assist or control ventilation manually

Severe hypoventilation requires immediate ventilatory support via manual or mechanical ventilation to prevent hypercapnia and hypoxemia.

Question 131: When performing a surgical hand scrub, the technician should scrub their hands and arms in a way that ensures:

• The hands are held below the level of the elbows at all times.
• A non-antiseptic soap is used to preserve normal skin flora.
• The fingers and hands are scrubbed last, after the forearms.
• Water runs from the fingertips down to the elbows. (Correct answer)

Correct answer: Water runs from the fingertips down to the elbows.

During a surgical scrub, hands must be held higher than the elbows to allow water to flow from the cleanest area (the fingertips) down towards the less clean area (the elbows), preventing contamination of the hands. An antiseptic agent should be used, and the scrubbing process should proceed from the fingertips down to the forearms.

Question 132: A veterinarian orders 250 mg of cephalexin to be administered orally every 8 hours for 10 days. The in-house pharmacy has 500 mg tablets and 250 mg capsules. To ensure compliance and accurate dosing, which of the following should the veterinary technician dispense?

• 15 tablets, labeled 'Give 1/2 tablet every 8 hours' (Correct answer)
• 30 tablets, labeled 'Give 1 tablet every 8 hours'
• 15 capsules, labeled 'Give 1/2 capsule every 8 hours'
• 30 capsules, labeled 'Give 1 capsule every 8 hours'

Correct answer: 15 tablets, labeled 'Give 1/2 tablet every 8 hours'

The order is for 250 mg, and the 500 mg tablets are scored, allowing them to be accurately split in half to provide the correct 250 mg dose. Dispensing 15 tablets covers the 10-day (30 doses) treatment period (30 doses * 0.5 tablets/dose = 15 tablets). Capsules should not be split, and dispensing whole 500 mg tablets would be an overdose.

Question 133: The PIVKA test (Proteins Induced by Vitamin K Absence or Antagonism) is used to diagnose:

• Rodenticide anticoagulant toxicosis (Correct answer)
• Von Willebrand disease
• Disseminated intravascular coagulation (DIC)
• Immune-mediated thrombocytopenia

Correct answer: Rodenticide anticoagulant toxicosis

PIVKA (also called Thrombotest or Normotest) detects inactive clotting factors caused by vitamin K deficiency or antagonism, as seen with anticoagulant rodenticide ingestion.

Question 134: A patient is receiving aminoglycoside antibiotics. Which parameter is most important to monitor for toxicity?

• Coagulation times
• Renal function (BUN, creatinine) (Correct answer)
• Liver enzymes (ALT, AST)
• Complete blood count

Correct answer: Renal function (BUN, creatinine)

Aminoglycosides (e.g., gentamicin, amikacin) are nephrotoxic and ototoxic; renal function parameters should be monitored closely during treatment.

Question 135: A dog's capnograph waveform shows an elevated baseline (above zero during inspiration). What does this indicate?

• CO2 rebreathing (Correct answer)
• Hypoventilation
• Endobronchial intubation
• Esophageal intubation

Correct answer: CO2 rebreathing

An elevated capnograph baseline indicates the patient is inhaling CO2, consistent with rebreathing due to exhausted CO2 absorbent or an incompetent expiratory valve.

Question 136: Guinea pigs must always have access to?

• Vitamin B
• Vitamin A
• Vitamin C
• Vitamin D

Because they are unable to produce their own vitamin C, humans, primates, apes, guinea pigs, capybaras, and some bats, birds, and fish must obtain it from outside sources.

Question 137: What is the primary mechanism of action of acepromazine as a preanesthetic?

• NMDA receptor antagonism
• Opioid receptor agonism
• Alpha-2 adrenergic agonism
• Dopamine receptor antagonism (Correct answer)

Correct answer: Dopamine receptor antagonism

Acepromazine is a phenothiazine tranquilizer that works primarily by blocking dopamine receptors in the CNS, producing sedation and reducing anxiety.

Question 138: Which radiographic finding on a dental X-ray most strongly suggests a periapical abscess in a veterinary patient?

• Increased opacity around the root tip
• Loss of enamel density
• Periapical lucency (halo) surrounding the root apex (Correct answer)
• Widening of the crown

Correct answer: Periapical lucency (halo) surrounding the root apex

A periapical lucency (radiolucent halo) around the root tip indicates bone resorption caused by infection or inflammation at the apex, consistent with periapical abscess.

Question 139: A cat anesthetized with isoflurane develops a heart rate of 240 bpm. Which drug is most appropriate to treat this tachycardia?

• Dexmedetomidine (Correct answer)
• Dopamine
• Epinephrine
• Atropine

Correct answer: Dexmedetomidine

Dexmedetomidine causes bradycardia via alpha-2 agonism and can be used to slow an anesthetic-induced tachycardia in cats.

Question 140: Which monitoring parameter is MOST useful for detecting malignant hyperthermia early during anesthesia?

• Heart rate
• Blood pressure
• SpO2
• End-tidal CO2 (Correct answer)

Correct answer: End-tidal CO2

End-tidal CO2 rises rapidly in malignant hyperthermia due to increased cellular metabolism, making capnography the most sensitive early indicator.

Question 141: Which of the following drugs is classified as a phenothiazine tranquilizer used in veterinary medicine?

• Xylazine
• Acepromazine (Correct answer)
• Ketamine
• Medetomidine

Correct answer: Acepromazine

Acepromazine is a phenothiazine derivative used as a sedative and preanesthetic tranquilizer in veterinary patients.

Question 142: When performing a pre-anesthetic physical exam, which ASA classification applies to a patient with a severe systemic disease that is a constant threat to life?

• ASA V
• ASA IV (Correct answer)
• ASA II
• ASA III

Correct answer: ASA IV

ASA IV describes a patient with severe systemic disease that is a constant life threat, representing very high anesthetic risk.

Question 143: Which type of drug interaction occurs when two drugs compete for the same plasma protein binding sites, potentially increasing free drug levels?

• Enzyme induction
• Receptor downregulation
• Pharmacodynamic synergism
• Protein binding displacement (Correct answer)

Correct answer: Protein binding displacement

Protein binding displacement occurs when one drug displaces another from albumin binding sites, increasing the free (active) concentration of the displaced drug.

Question 144: What is the normal packed cell volume (PCV) range for adult dogs?

• 20–30%
• 60–70%
• 10–20%
• 37–55% (Correct answer)

Correct answer: 37–55%

The normal PCV (hematocrit) for adult dogs is approximately 37–55%, with values below 37% indicating anemia.

Question 145: A radiograph shows increased opacity in the lung fields with an air bronchogram sign. This finding is MOST consistent with:

• Vascular congestion only
• Pneumothorax
• Pleural effusion
• Alveolar lung disease (Correct answer)

Correct answer: Alveolar lung disease

Air bronchograms form when fluid or soft tissue fills the alveoli but air remains in the bronchi, creating a visible bronchial pattern — classic for alveolar (consolidating) lung disease.

Question 146: What is the most likely interpretation if a blood sample shows marked lipemia on a serum chemistry panel?

• Post-prandial state or hyperlipidemia disorder (Correct answer)
• In vitro glucose consumption
• Hemolysis artifact only
• Severe anemia

Correct answer: Post-prandial state or hyperlipidemia disorder

Lipemia (milky appearance) in serum is most commonly caused by post-prandial triglyceride elevation or a primary hyperlipidemia disorder, and can interfere with multiple chemistry analytes.

Question 147: Which of the following is a zoonotic disease that can be detected on fecal examination?

• Dirofilaria immitis microfilariae
• Anaplasma phagocytophilum morulae
• Toxoplasma gondii oocysts in cat feces (Correct answer)
• Mycoplasma haemofelis

Correct answer: Toxoplasma gondii oocysts in cat feces

Toxoplasma gondii oocysts shed in cat feces are infectious to humans, especially immunocompromised individuals and pregnant women.

Question 148: Why is dental polishing performed after ultrasonic scaling in veterinary dental procedures?

• To whiten the teeth cosmetically
• To apply fluoride treatment
• To smooth enamel micro-scratches and reduce plaque adhesion (Correct answer)
• To check for fractures

Correct answer: To smooth enamel micro-scratches and reduce plaque adhesion

Polishing smooths the micro-scratches left by scaling instruments, creating a surface less hospitable to bacterial plaque adhesion.

Question 149: In a complete urinalysis, crystals identified as colorless coffin-lid shaped structures are most likely:

• Calcium oxalate monohydrate
• Cystine
• Uric acid
• Struvite (magnesium ammonium phosphate) (Correct answer)

Correct answer: Struvite (magnesium ammonium phosphate)

Struvite crystals classically appear as colorless three-to-six-sided 'coffin-lid' prisms and are common in alkaline urine.

Question 150: Which of the following is NOT a clinical sign of dehydration in veterinary patients?

• Dry mucous membranes
• Bradycardia (Correct answer)
• Sunken eyes
• Skin tenting

Correct answer: Bradycardia

Dehydration causes tachycardia (compensatory), not bradycardia; the other three are classic signs of fluid deficit.

Question 151: What is the term for the time it takes for a drug's plasma concentration to decrease by 50%?

• Bioavailability
• Half-life (Correct answer)
• Clearance
• Volume of distribution

Correct answer: Half-life

Half-life (t½) is the time required for the plasma concentration of a drug to fall to half its original value.

Question 152: Which instrument is used to retract and hold open the edges of a surgical incision to improve visualization of deeper structures?

• Metzenbaum scissors
• Gelpi retractor (Correct answer)
• Thumb forceps
• Mayo scissors

Correct answer: Gelpi retractor

The Gelpi retractor is a self-retaining instrument with sharp prongs that hold wound edges apart, providing hands-free exposure of deeper tissues.

Question 153: Which of the following is the BEST method to confirm a diagnosis of diabetes mellitus in a cat showing glucosuria?

• Urine glucose dipstick only
• Fructosamine level reflecting 2–3 week average glucose (Correct answer)
• Total protein measurement
• Single fasting blood glucose measurement

Correct answer: Fructosamine level reflecting 2–3 week average glucose

Fructosamine reflects average blood glucose over the prior 2–3 weeks and is not affected by stress hyperglycemia, making it ideal for confirming diabetes in cats.

Question 154: Which drug is the antidote for acetaminophen toxicity in cats?

• Vitamin K1
• Ethanol
• Deferoxamine
• N-acetylcysteine (Correct answer)

Correct answer: N-acetylcysteine

N-acetylcysteine replenishes glutathione stores and is the antidote for acetaminophen toxicity, which causes methemoglobinemia and hepatotoxicity in cats.

Question 155: What is the recommended endotracheal tube cuff inflation pressure to prevent tracheal damage in small animals?

• Greater than 30 cmH2O
• Less than 50 cmH2O
• Less than 20 cmH2O (Correct answer)
• Less than 5 cmH2O

Correct answer: Less than 20 cmH2O

Cuff pressure should be maintained below 20–25 cmH2O to prevent ischemic necrosis of the tracheal mucosa from excessive pressure.

Question 156: According to the most recent RECOVER guidelines for veterinary CPR, what is the recommended rate and depth for chest compressions in most dogs and cats?

• 60-80 compressions per minute, compressing the chest by at least 1/2 its width.
• 80-100 compressions per minute, compressing the chest by 1/4 to 1/3 its width.
• 120-150 compressions per minute, compressing the chest by 1/2 to 2/3 its width.
• 100-120 compressions per minute, compressing the chest by 1/3 to 1/2 its width. (Correct answer)

Correct answer: 100-120 compressions per minute, compressing the chest by 1/3 to 1/2 its width.

The RECOVER (Reassessment Campaign on Veterinary Resuscitation) initiative has established evidence-based guidelines for CPR. The recommended rate for chest compressions is 100-120 per minute, and the depth should be 1/3 to 1/2 the width of the chest, allowing for full chest recoil between compressions.

Question 157: A reverse distributor is what?

• A Drug Enforcement Administration registered pharmacist who is authorized to sell items from their inventory to practitioners
• A supplier who resells returned merchandise
• A supplier who resells returned pharmacy merchandise only
• A Drug Enforcement Administration registrant authorized to receive unusable or unwanted controlled substances (Correct answer)

Correct answer: A Drug Enforcement Administration registrant authorized to receive unusable or unwanted controlled substances

Practitioners get rid of outdated, harmed, useless, and undesired controlled substances by giving them to a reverse distributor, a registered drug dealer with the Drug Enforcement Administration who is allowed to accept them. A list of authorized reverse distributors is provided by regional DEA field offices. For a period of two years, copies of the records attesting to the transfer and disposal must be kept.

Question 158: A technician needs to perform a Gram stain on a bacterial smear. What is the correct sequence of reagents used in this differential staining procedure?

• Decolorizer, Safranin, Crystal Violet, Iodine
• Safranin, Iodine, Crystal Violet, Decolorizer
• Crystal Violet, Iodine, Decolorizer, Safranin (Correct answer)
• Iodine, Crystal Violet, Safranin, Decolorizer

Correct answer: Crystal Violet, Iodine, Decolorizer, Safranin

The correct order for a Gram stain is: 1) Crystal Violet (primary stain), 2) Gram's Iodine (mordant to fix the stain), 3) a Decolorizer (like alcohol/acetone) to remove the stain from Gram-negative cells, and 4) Safranin (counterstain) to color the decolorized Gram-negative cells red or pink.

Question 159: Which radiographic view is best for evaluating intervertebral disc disease in the thoracolumbar spine of a dog?

• Oblique
• Lateral recumbent (Correct answer)
• Ventrodorsal
• Dorsoventral

Correct answer: Lateral recumbent

The lateral recumbent view provides the best visualization of intervertebral disc spaces and any narrowing or mineralization in the thoracolumbar spine.

Question 160: What is the mechanism of action of furosemide?

• Blocks sodium channels in the collecting duct
• Inhibits carbonic anhydrase in the proximal tubule
• Inhibits the Na-K-2Cl cotransporter in the loop of Henle (Correct answer)
• Blocks aldosterone receptors in the distal tubule

Correct answer: Inhibits the Na-K-2Cl cotransporter in the loop of Henle

Furosemide is a loop diuretic that inhibits the Na-K-2Cl cotransporter in the ascending limb of the loop of Henle, reducing sodium and water reabsorption.

Question 161: A rabbit is to receive enrofloxacin 5 mg/kg SID. The rabbit weighs 2.2 kg. The available concentration is 22.7 mg/mL. How many mL per dose?

• 0.25 mL
• 0.40 mL
• 0.48 mL (Correct answer)
• 0.50 mL

Correct answer: 0.48 mL

2.2 kg × 5 mg/kg = 11 mg; 11 mg ÷ 22.7 mg/mL ≈ 0.48 mL.

Question 162: What is the primary advantage of using ultrasound over radiography when evaluating a splenic mass in a dog?

• Lower cost
• No patient preparation required
• No radiation exposure and faster results
• Better soft tissue differentiation and vascularity assessment (Correct answer)

Correct answer: Better soft tissue differentiation and vascularity assessment

Ultrasound provides superior soft tissue contrast and allows Doppler assessment of blood flow, helping distinguish cystic from solid masses and evaluate vascularity.

Question 163: Which coagulation test evaluates the extrinsic pathway of the clotting cascade?

• Activated clotting time (ACT)
• Activated partial thromboplastin time (aPTT)
• Bleeding time
• Prothrombin time (PT) (Correct answer)

Correct answer: Prothrombin time (PT)

PT evaluates Factor VII and the common pathway (Factors X, V, II, I), reflecting the extrinsic coagulation cascade.

Question 164: A veterinary technician examines a urine sediment sample from a 7-year-old male Dalmatian and observes numerous flat, six-sided, colorless crystals. This finding is most consistent with which type of crystal?

• Struvite
• Calcium Carbonate
• Calcium Oxalate Dihydrate
• Uric Acid (Correct answer)

Correct answer: Uric Acid

Dalmatians have a genetic defect in purine metabolism that leads to increased excretion of uric acid in their urine. This predisposes them to the formation of uric acid crystals and uroliths, which are characteristically diamond, rhomboid, or six-sided (hexagonal) plates.

Question 165: The zona contaminata in surgery refers to:

• The area beyond the sterile field that is considered non-sterile (Correct answer)
• The sterile draped area immediately around the incision
• The scrub technician's back table
• The surgical site preparation zone

Correct answer: The area beyond the sterile field that is considered non-sterile

The zona contaminata encompasses all areas outside the established sterile field, which are considered non-sterile and must not contact sterile items.

Question 166: Before administering medication via a nasogastric tube, the technician must first:

• Flush immediately with 20 mL of warm saline
• Clamp the tube and wait 5 minutes
• Confirm tube placement by aspirating gastric contents or auscultating while injecting air (Correct answer)
• Administer the medication rapidly to avoid tube occlusion

Correct answer: Confirm tube placement by aspirating gastric contents or auscultating while injecting air

Confirming correct tube placement before administration prevents fatal aspiration pneumonia if the tube is inadvertently in the trachea.

Question 167: Which antiparasitic drug class works by causing irreversible opening of glutamate-gated chloride channels in invertebrates?

• Pyrethrins
• Benzimidazoles
• Macrocyclic lactones (Correct answer)
• Organophosphates

Correct answer: Macrocyclic lactones

Macrocyclic lactones (e.g., ivermectin, milbemycin) work by opening glutamate-gated chloride channels, causing paralysis and death of parasites.

Question 168: Which route of administration provides the fastest onset of drug action?

• Intramuscular
• Intravenous (Correct answer)
• Oral
• Subcutaneous

Correct answer: Intravenous

Intravenous administration delivers the drug directly into systemic circulation, providing the fastest onset of action.

Question 169: Which antibiotic class inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins?

• Beta-lactams (Correct answer)
• Fluoroquinolones
• Aminoglycosides
• Macrolides

Correct answer: Beta-lactams

Beta-lactam antibiotics (penicillins, cephalosporins) inhibit cell wall synthesis by binding to penicillin-binding proteins (PBPs).

Question 170: What is the primary reason ethylene oxide (EtO) gas sterilization is used for certain surgical equipment?

• It sterilizes heat- and moisture-sensitive items that cannot withstand steam (Correct answer)
• It is less expensive than all other methods
• It does not require aeration time before use
• It is faster than autoclave sterilization

Correct answer: It sterilizes heat- and moisture-sensitive items that cannot withstand steam

EtO sterilization is used for items such as plastics, electronics, and rubber goods that would be damaged by the heat and moisture of steam autoclaving.

Question 171: A 2-year-old dog is presented for a 5-day post-operative recheck after a routine castration. The owner reports the dog has been excessively licking the incision. Which of the following clinical findings is the most definitive sign of surgical wound dehiscence?

• Separation of the incision edges with subcutaneous tissue visible. (Correct answer)
• Moderate swelling and redness (erythema) around the incision line.
• A small amount of dried serosanguinous discharge (crusting) on the sutures.
• The dog showing signs of pain upon palpation of the surgical site.

Correct answer: Separation of the incision edges with subcutaneous tissue visible.

Wound dehiscence is defined as the separation or opening of a surgical wound's edges before it is fully healed. While redness, swelling, minor discharge, and pain can be signs of inflammation or infection, the actual visible separation of the wound layers is the hallmark sign of dehiscence.

Question 172: A 4-year-old Golden Retriever is scheduled for a tibial plateau leveling osteotomy (TPLO) on its right hind limb. When preparing the surgical site, what is the most appropriate area to clip and aseptically prepare?

• A small square patch directly over the stifle joint.
• A full circumferential clip from the level of the hip to the tarsus. (Correct answer)
• The area from the stifle to the foot, including the paw.
• From the mid-femur to the mid-tibia, clipping only the lateral aspect.

Correct answer: A full circumferential clip from the level of the hip to the tarsus.

Orthopedic procedures like a TPLO require a very large and wide sterile field to allow for manipulation of the limb during surgery and to minimize the risk of contamination. The standard practice is to perform a full circumferential clip from the joint above (hip/coxofemoral joint) to the joint below (hock/tarsus).

Question 173: When collecting a urine sample by cystocentesis, which needle gauge and direction is most appropriate?

• 16-gauge needle, directed toward the bladder neck
• 22-gauge needle, directed into the bladder body (Correct answer)
• 25-gauge needle, into the renal pelvis
• 18-gauge needle, into the urethra

Correct answer: 22-gauge needle, directed into the bladder body

A 22-gauge needle directed into the body of the bladder is standard for cystocentesis to minimize trauma and obtain a sterile sample.

Question 174: Which contrast medium is typically used for a positive-contrast cystogram in small animals?

• Saline solution
• Barium sulfate suspension
• Carbon dioxide gas
• Iodinated water-soluble contrast agent (Correct answer)

Correct answer: Iodinated water-soluble contrast agent

Iodinated water-soluble contrast agents (e.g., iohexol) are used for cystography because barium is contraindicated if bladder rupture is possible and would be hazardous in the peritoneal cavity.

Question 175: Which fecal egg flotation solution has the highest specific gravity and is best for recovering heavy parasite eggs such as Taenia spp.?

• Zinc sulfate (SG 1.18)
• Sugar (Sheather's) solution (SG 1.27) (Correct answer)
• Sodium chloride (SG 1.20)
• Sodium nitrate (SG 1.20)

Correct answer: Sugar (Sheather's) solution (SG 1.27)

Sheather's sugar solution has a specific gravity of approximately 1.27, making it capable of floating heavier eggs including tapeworm eggs that may sink in lower SG solutions.

Question 176: A patient's SpO2 drops to 88% intraoperatively. After checking the sensor placement, the NEXT action is to:

• Administer atropine IV
• Increase isoflurane vaporizer setting
• Decrease IV fluid rate
• Manually ventilate with 100% oxygen and assess airway and breathing (Correct answer)

Correct answer: Manually ventilate with 100% oxygen and assess airway and breathing

An SpO2 of 88% indicates significant hypoxemia requiring immediate manual ventilation with 100% O2 and assessment of airway patency, ETT position, and lung sounds.

Question 177: In ultrasound terminology, a structure that appears brighter (whiter) than surrounding tissue is described as:

• Anechoic
• Hyperechoic (Correct answer)
• Isoechoic
• Hypoechoic

Correct answer: Hyperechoic

Hyperechoic structures reflect more sound waves back to the transducer, appearing brighter white relative to surrounding tissue on the ultrasound image.

Question 178: When preparing an abdominal surgical site on a dog, the prep should extend at minimum how far from the planned incision line in each direction?

• Only to the drape line
• 1 cm
• 10 cm (or to include a generous margin) (Correct answer)
• 5 cm

Correct answer: 10 cm (or to include a generous margin)

A minimum 10 cm margin (or a generous margin extending well beyond the incision) is recommended to maintain a sterile field if retraction is needed.

Question 179: Which local anesthetic has the LONGEST duration of action and is commonly used for epidural analgesia in veterinary patients?

• Lidocaine
• Bupivacaine (Correct answer)
• Mepivacaine
• Procaine

Correct answer: Bupivacaine

Bupivacaine has the longest duration of action (4–8 hours) among commonly used veterinary local anesthetics and is preferred for epidural analgesia.

Question 180: Which finding on a urinalysis sediment is pathognomonic for ethylene glycol toxicity in cats?

• Uric acid crystals
• Bilirubin crystals
• Calcium oxalate monohydrate crystals (hippurate-shaped) (Correct answer)
• Struvite crystals

Correct answer: Calcium oxalate monohydrate crystals (hippurate-shaped)

Calcium oxalate monohydrate crystals (envelope- or hippurate-shaped in cats) in large numbers in fresh urine are characteristic of ethylene glycol (antifreeze) poisoning.

Question 181: What is the primary mechanism of action of NSAIDs in veterinary patients?

• Block opioid receptors
• Inhibit cyclooxygenase (COX) enzymes (Correct answer)
• Stimulate alpha-2 adrenergic receptors
• Antagonize histamine receptors

Correct answer: Inhibit cyclooxygenase (COX) enzymes

NSAIDs reduce inflammation and pain by inhibiting COX-1 and/or COX-2 enzymes, decreasing prostaglandin synthesis.

Question 182: A ferret undergoing anesthesia begins to show signs of hypoglycemia. Which condition is most commonly responsible for this complication in ferrets?

• Adrenal gland disease
• Insulinoma (Correct answer)
• Hepatic lipidosis
• Renal failure

Correct answer: Insulinoma

Insulinomas are extremely common in ferrets and cause excessive insulin secretion, leading to hypoglycemia especially under the fasting stress of anesthesia.

Question 183: Which of the following serum chemistry tests is considered the most specific indicator of hepatocellular (liver cell) damage in dogs and cats?

• Alanine Aminotransferase (ALT) (Correct answer)
• Alkaline Phosphatase (ALP)
• Total Bilirubin
• Blood Urea Nitrogen (BUN)

Correct answer: Alanine Aminotransferase (ALT)

Alanine Aminotransferase (ALT) is a leakage enzyme found in high concentrations within the cytoplasm of hepatocytes. When liver cells are damaged, ALT leaks into the bloodstream, making it a sensitive and specific indicator of hepatocellular injury in small animals. While ALP can indicate liver issues, it is more related to cholestasis and can be elevated for other reasons (e.g., bone growth, steroid use). BUN is a marker of kidney function and protein metabolism, and Total Bilirubin indicates issues with bile flow or hemolysis.

Question 184: Absorbable suture material is MOST appropriate for which of the following applications?

• Ligation of internal vessels and closure of deeper tissue layers (Correct answer)
• Securing indwelling catheters externally
• Repair of tendons requiring prolonged tensile strength
• Skin closure in a contaminated wound

Correct answer: Ligation of internal vessels and closure of deeper tissue layers

Absorbable sutures are used for internal tissues (fascia, vessels, subcutaneous layers) where eventual degradation eliminates the need for removal.

Question 185: Why is polyglycolic acid (PGA) suture preferred over catgut in contaminated wounds?

• PGA is more resistant to degradation by bacterial enzymes in infected environments (Correct answer)
• PGA causes more tissue reaction
• PGA loses tensile strength faster
• PGA is non-absorbable

Correct answer: PGA is more resistant to degradation by bacterial enzymes in infected environments

PGA (Dexon) resists degradation by bacterial collagenases better than catgut, maintaining tensile strength longer in contaminated or infected tissue.

Question 186: Which fluid type is considered isotonic and is most commonly used for routine fluid replacement therapy in small animals?

• 3% Sodium Chloride
• 5% Dextrose in Water (D5W)
• 7.5% Sodium Chloride
• 0.9% Sodium Chloride (Normal Saline) (Correct answer)

Correct answer: 0.9% Sodium Chloride (Normal Saline)

0.9% NaCl is isotonic with plasma and is a standard crystalloid used for fluid replacement in small animal patients.

Question 187: A cat with chronic regurgitation is scheduled for a barium sulfate contrast study. What is the primary purpose of administering this positive contrast agent?

• To perform a double-contrast study of the urinary bladder.
• To evaluate renal perfusion and excretion.
• To visualize the spinal cord for signs of compression.
• To outline the gastrointestinal tract to assess motility, and identify mucosal lesions or obstructions. (Correct answer)

Correct answer: To outline the gastrointestinal tract to assess motility, and identify mucosal lesions or obstructions.

Barium sulfate is a positive contrast agent that is administered orally to coat the lining of the gastrointestinal (GI) tract. This allows for radiographic visualization of the esophagus, stomach, and intestines to evaluate their structure, function (motility), and to identify foreign bodies, masses, strictures, or mucosal irregularities.

Question 188: Which radiographic view is best for evaluating the trachea and mainstem bronchi in a dog?

• Ventrodorsal
• Skyline
• Oblique
• Lateral (Correct answer)

Correct answer: Lateral

The lateral view superimposes the trachea and mainstem bronchi in profile, making them easiest to evaluate without superimposition of other structures.

Question 189: Which anesthetic monitoring parameter MOST directly reflects cardiac output during surgery?

• End-tidal CO2 (EtCO2) (Correct answer)
• Respiratory rate
• SpO2
• Body temperature

Correct answer: End-tidal CO2 (EtCO2)

EtCO2 closely reflects cardiac output because CO2 delivery to the lungs depends on pulmonary perfusion; a sudden drop often indicates reduced cardiac output.

Question 190: Which government agency is responsible for regulating animal topical pesticides?

• Food and Drug Administration (FDA)
• Drug Enforcement Administration (DEA)
• United States Department of Agriculture (USDA)
• Environmental Protection Agency (EPA) (Correct answer)

Correct answer: Environmental Protection Agency (EPA)

The Environmental Protection Agency (EPA) is the regulatory body that oversees the development and approval of topical pesticides for animals, such as flea and tick preventatives. The FDA regulates animal drugs, the DEA regulates controlled substances, and the USDA regulates vaccines and other biologics.

Question 191: Which aminoglycoside is the most harmful to the kidneys?

• Streptomycin
• Amikacin
• Tobramycin
• Neomycin (Correct answer)

Correct answer: Neomycin

The most nephrotoxic aminoglycoside is neomycin. Nephrotoxicosis, ototoxicosis, and vestibulotoxicosis are three of the main side effects of aminoglycosides. With frequent and prolonged administration of aminoglycosides, especially when trough concentrations are chronically increased, nephrotoxicosis risk increases. According to articles in the veterinary literature, neomycin is the most kidney-damaging of the group.

Question 192: A serum chemistry panel shows markedly elevated ALT and AST with only mildly elevated ALP in a dog. This pattern most suggests:

• Cholestasis
• Hepatocellular damage (Correct answer)
• Primary bone disease
• Pancreatic disease

Correct answer: Hepatocellular damage

ALT and AST are hepatocellular enzymes; marked elevation of both with minimal ALP elevation is most consistent with hepatocellular injury rather than cholestasis.

Question 193: A veterinarian prescribes phenobarbital for a 5-year-old dog diagnosed with idiopathic epilepsy. What is the primary mechanism of action for this drug?

• Enhancing the effect of the inhibitory neurotransmitter GABA (Correct answer)
• Antagonizing glutamate receptors
• Inhibiting the reuptake of serotonin and norepinephrine
• Blocking voltage-gated sodium channels

Correct answer: Enhancing the effect of the inhibitory neurotransmitter GABA

Phenobarbital, a barbiturate anticonvulsant, primarily works by potentiating the effect of gamma-aminobutyric acid (GABA), the main inhibitory neurotransmitter in the central nervous system. It binds to GABA-A receptors, which increases the duration of chloride channel opening, leading to hyperpolarization of the cell membrane and reduced neuronal excitability.

Question 194: A cat presents with suspected hypertrophic cardiomyopathy. Which echocardiographic measurement is MOST important to obtain?

• Right atrial area
• Aortic root diameter
• Left ventricular free wall thickness in diastole (Correct answer)
• Pulmonary artery diameter

Correct answer: Left ventricular free wall thickness in diastole

HCM is diagnosed by increased left ventricular wall thickness (≥6 mm in diastole in cats) measured in the absence of other causes of hypertrophy.

Question 195: What is the mechanism by which metronidazole kills anaerobic bacteria?

• Inhibits protein synthesis at the 50S ribosomal subunit
• Inhibits cell wall synthesis
• Blocks dihydrofolate reductase
• Forms toxic free radicals that damage DNA after reduction in anaerobic conditions (Correct answer)

Correct answer: Forms toxic free radicals that damage DNA after reduction in anaerobic conditions

Metronidazole is reduced by anaerobic organisms into reactive intermediates that form free radicals, causing lethal DNA strand breakage.

Question 196: A patient's rectal temperature is 104.5°F (40.3°C). How is this classified in dogs?

• Mild to moderate hyperthermia (Correct answer)
• Normal
• Hypothermia
• Severe hyperthermia

Correct answer: Mild to moderate hyperthermia

Normal canine rectal temperature is 100.5–102.5°F; 104.5°F falls in the mild to moderate hyperthermia range, with severe hyperthermia typically above 106°F.

Question 197: Which nerve block technique would be MOST appropriate to provide dental analgesia for a maxillary canine tooth extraction in a dog?

• Mental nerve block
• Infraorbital nerve block (Correct answer)
• Retrobulbar block
• Mandibular nerve block

Correct answer: Infraorbital nerve block

The infraorbital nerve block desensitizes the maxillary teeth (rostral to the 4th premolar) and surrounding tissues, making it ideal for maxillary canine extraction.

Question 198: A horse anesthetized with guaifenesin-ketamine develops muscle rigidity and paddling. Which drug should be administered to address this?

• Additional ketamine bolus
• Epinephrine IM
• Diazepam IV (Correct answer)
• Atropine IV

Correct answer: Diazepam IV

Diazepam (a benzodiazepine) provides muscle relaxation and helps control excitement or rigidity seen with dissociative anesthesia in horses.

Question 199: Which oxygen delivery method provides the highest inspired oxygen concentration for a dyspneic patient?

• Non-rebreather mask with reservoir bag (Correct answer)
• Oxygen cage
• Flow-by oxygen
• Nasal cannula

Correct answer: Non-rebreather mask with reservoir bag

A non-rebreather mask with a reservoir bag can deliver FiO2 approaching 90–100%, far exceeding other delivery methods.

Question 200: Which drug is used to reverse benzodiazepine sedation in veterinary patients?

• Naloxone
• Atipamezole
• Yohimbine
• Flumazenil (Correct answer)

Correct answer: Flumazenil

Flumazenil is a competitive benzodiazepine antagonist at the GABA-A receptor that reverses sedation from diazepam or midazolam.

Question 201: When reading a microhematocrit tube after centrifugation, what layer is found between the packed red cells and the plasma?

• Protein band
• Lipid layer
• Buffy coat (Correct answer)
• Fibrin layer

Correct answer: Buffy coat

The buffy coat is a thin whitish layer between the packed RBCs and plasma that contains white blood cells and platelets.

Question 202: A cat's blood smear shows many erythrocytes with refractile inclusions near the cell membrane that stain blue with new methylene blue. This is MOST consistent with:

• Siderotic granules
• Howell-Jolly bodies
• Heinz bodies (Correct answer)
• Basophilic stippling

Correct answer: Heinz bodies

Heinz bodies are aggregates of denatured hemoglobin that stain with supravital stains like new methylene blue and are common in cats due to their susceptibility to oxidative damage.