Question 1: 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?

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

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

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

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 3: When performing a ring block for a digit surgery in a dog, which complication is most likely if epinephrine is included in the local anesthetic?

• Ischemic necrosis of the digit (Correct answer)
• Prolonged motor blockade
• Systemic hypertension
• Methemoglobinemia

Correct answer: Ischemic necrosis of the digit

Epinephrine causes vasoconstriction, which in end-arterial areas like digits can lead to ischemia and necrotic tissue damage.

Question 4: Which oxygen delivery method provides the highest inspired oxygen concentration for a dyspneic patient?

• Oxygen cage
• Flow-by oxygen
• Non-rebreather mask with reservoir bag (Correct answer)
• 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 5: Which chemistry value would you expect to be ELEVATED in a patient with cholestasis?

• Glucose
• Alkaline phosphatase (ALP) (Correct answer)
• 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 6: Which of the following drugs is classified as a phenothiazine tranquilizer used in veterinary medicine?

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

Correct answer: Acepromazine

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

Question 7: A cat receiving enrofloxacin at high doses is at risk for which serious adverse effect?

• Nephrotoxicity
• Hepatotoxicity
• Bone marrow suppression
• 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 8: A urine specific gravity of 1.008–1.012 in a dog is classified as:

• Normosthenuria
• Hyposthenuria
• Isosthenuria (Correct answer)
• Hypersthenuria

Correct answer: Isosthenuria

Isosthenuria refers to urine specific gravity in the range of 1.008–1.012, which is similar to glomerular filtrate and indicates inadequate concentrating or diluting ability.

Question 9: What does the term 'aseptic technique' mean in the context of veterinary surgery?

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

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 10: A dog presents to the emergency service after ingesting a large amount of dark chocolate. Which of the following clinical signs is most commonly associated with methylxanthine toxicity?

• Tachycardia and hyperactivity (Correct answer)
• Anemia and jaundice
• Bradycardia and lethargy
• Hypothermia and ataxia

Correct answer: Tachycardia and hyperactivity

The toxic compounds in chocolate are methylxanthines (theobromine and caffeine), which act as stimulants. They primarily affect the central nervous and cardiovascular systems, leading to signs such as restlessness, hyperactivity, tremors, tachycardia, and arrhythmias.

Question 11: 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)
• Hypoechoic
• Isoechoic
• Hyperechoic

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

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

Correct answer: Macrocyclic lactones

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

Question 13: Which instrument is specifically designed to clamp and crush tissue to facilitate intestinal resection and anastomosis?

• Allis tissue forceps
• Doyen forceps (Correct answer)
• Backhaus towel clamp
• Carmalt forceps

Correct answer: Doyen forceps

Doyen intestinal forceps are non-crushing clamps used to occlude the intestinal lumen without damaging tissue during resection and anastomosis.

Question 14: During anesthesia, a cat's respiratory rate drops to 4 breaths per minute. Which intervention is MOST appropriate?

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

Correct answer: Assist or control ventilation manually

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

Question 15: Which instrument is used to retract and hold open the edges of a surgical incision to improve visualization of deeper structures?

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

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 16: 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 17: A dog is presented with acute onset of seizures. To best visualize the soft tissues of the brain and detect potential inflammation or a non-mineralized tumor, which imaging modality is superior?

• Standard Radiography
• Fluoroscopy
• Computed Tomography (CT)
• Magnetic Resonance Imaging (MRI) (Correct answer)

Correct answer: Magnetic Resonance Imaging (MRI)

Magnetic Resonance Imaging (MRI) is the gold standard for imaging soft tissues, particularly the central nervous system. It provides excellent contrast between different soft tissue types, such as gray and white matter in the brain, making it superior for detecting inflammation (encephalitis), edema, and soft tissue tumors. CT is faster and better for imaging bone and acute hemorrhage.

Question 18: The Minimum Alveolar Concentration (MAC) of an inhalant anesthetic agent refers to the:

• concentration required to maintain a surgical plane of anesthesia in all patients.
• maximum safe concentration that can be delivered by the vaporizer.
• percentage of the anesthetic agent that is metabolized by the liver.
• lowest concentration of anesthetic in the alveoli that prevents movement in 50% of patients in response to a noxious stimulus. (Correct answer)

Correct answer: lowest concentration of anesthetic in the alveoli that prevents movement in 50% of patients in response to a noxious stimulus.

MAC is a standard measure of the potency of an inhalant anesthetic. A lower MAC indicates a more potent anesthetic, meaning less of the agent is required to achieve a given anesthetic depth. It is specifically defined as the concentration at which 50% of subjects do not respond to a painful (noxious) stimulus.

Question 19: A cat presents in severe respiratory distress. Radiographs confirm a large volume of pleural effusion. What is the primary therapeutic goal of performing an immediate thoracocentesis?

• To measure intrapleural pressure.
• To obtain a fluid sample for cytology and culture.
• To administer intrapleural antibiotics.
• To allow for lung re-expansion and improve ventilation. (Correct answer)

Correct answer: To allow for lung re-expansion and improve ventilation.

The primary goal of a therapeutic thoracocentesis is to remove the fluid from the pleural space that is physically compressing the lungs and preventing them from inflating. Removing the fluid relieves this pressure, allows the lungs to re-expand, and immediately improves the patient's ability to breathe.

Question 20: A urine specific gravity of 1.045 in a dog most likely indicates:

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

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 21: A dog under inhalant anesthesia shows a sudden decrease in end-tidal CO2 from 45 mmHg to 15 mmHg. What is the MOST likely cause?

• Pulmonary thromboembolism or cardiac arrest (Correct answer)
• Hypoventilation
• Excessive anesthetic depth
• Hyperthermia

Correct answer: Pulmonary thromboembolism or cardiac arrest

A sudden dramatic drop in EtCO2 is a classic sign of pulmonary thromboembolism or cardiac arrest, where CO2 delivery to the lungs ceases.

Question 22: Which drug is commonly used as a preanesthetic to reduce salivation and bradycardia in veterinary patients?

• Acepromazine
• Diazepam
• Atropine (Correct answer)
• Butorphanol

Correct answer: Atropine

Atropine is an anticholinergic drug that blocks muscarinic receptors, reducing secretions and preventing vagally-induced bradycardia.

Question 23: A 44-lb dog is prescribed carprofen for osteoarthritis at a dose of 2.2 mg/kg twice daily. The available tablets are 100 mg, scored. How many tablets should be administered per dose?

• 0.75 tablets
• 0.25 tablets
• 0.5 tablets (Correct answer)
• 1.0 tablet

Correct answer: 0.5 tablets

First, convert the dog's weight from pounds to kilograms: 44 lb / 2.2 lb/kg = 20 kg. Next, calculate the required dose in mg: 20 kg * 2.2 mg/kg = 44 mg. Since the available tablets are 100 mg and are scored, the closest accurate dose is half a tablet (50 mg). Administering 0.5 tablets provides the appropriate therapeutic amount.

Question 24: A patient's SpO2 drops to 88% intraoperatively. After checking the sensor placement, the NEXT action is to:

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

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 25: Which medication is used to stimulate appetite in cats and works by acting as a serotonin antagonist?

• Cyproheptadine (Correct answer)
• Maropitant
• Mirtazapine
• Metoclopramide

Correct answer: Cyproheptadine

Cyproheptadine is a serotonin and histamine antagonist that stimulates appetite in cats, though mirtazapine is also used; cyproheptadine specifically is the classic serotonin antagonist appetite stimulant.

Question 26: In diagnostic radiography, what is the primary purpose of collimating the x-ray beam to the specific area of interest?

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

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

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

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 28: During an abdominal ultrasound, the veterinarian points out the urinary bladder, which appears completely black on the screen. What is the correct term to describe this appearance?

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

Correct answer: Anechoic

The term 'anechoic' means without echo. Simple fluids, like urine in the bladder, do not reflect the ultrasound waves back to the transducer. Therefore, these structures appear black on the ultrasound image. 'Hyperechoic' means brighter than surrounding tissue (e.g., bone), 'hypoechoic' means darker than surrounding tissue (e.g., muscle), and 'isoechoic' means having the same brightness.

Question 29: What is the withdrawal time of a drug in food-producing animals?

• Time required for 50% of the drug to be eliminated from plasma
• Time needed for a drug to reach peak plasma concentration
• Duration of therapeutic effect after a single dose
• Period after drug administration before the animal or its products are safe for human consumption (Correct answer)

Correct answer: Period after drug administration before the animal or its products are safe for human consumption

Withdrawal time is the mandatory period that must elapse after the last drug dose before the animal or its products (meat, milk, eggs) can enter the human food supply.

Question 30: What is the most common dental disease diagnosed in dogs and cats seen in veterinary practice?

• Malocclusion
• Periodontal disease (Correct answer)
• Tooth resorption
• Stomatitis

Correct answer: Periodontal disease

Periodontal disease is the most common dental condition in companion animals, affecting the majority of dogs and cats over age three.

Question 31: What is the purpose of using the ALARA principle in veterinary radiology?

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

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 32: Which antifungal drug works by inhibiting ergosterol synthesis in fungal cell membranes?

• Amoxicillin
• Fluconazole (Correct answer)
• Doxycycline
• Metronidazole

Correct answer: Fluconazole

Azole antifungals like fluconazole inhibit fungal cytochrome P450 enzymes, blocking ergosterol synthesis and disrupting the cell membrane.

Question 33: A common and potentially life-threatening complication during the immediate post-anesthetic recovery period for dogs and cats is:

• Polyuria
• Hypothermia (Correct answer)
• Hyperglycemia
• Hypertension

Correct answer: Hypothermia

Hypothermia is one of the most common complications during anesthesia and recovery. Anesthetic drugs depress the thermoregulatory center in the brain, and patients lose body heat to the environment. Severe hypothermia can lead to prolonged recovery, cardiac arrhythmias, and impaired drug metabolism.

Question 34: Which government agency is responsible for regulating animal topical pesticides?

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

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 35: 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?

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

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

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

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

• The brightness of the monitor displaying the image
• The field of view diameter during image acquisition
• The range of Hounsfield units displayed as shades of gray (Correct answer)
• 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 38: What shouldn't fluoroquinolones be used in?

• Young animals because they cause arthropathy (Correct answer)
• Growing animals because they cause heart conduction disturbance
• Older animals because they cause arthropathy
• 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 39: Which of the following is NOT a clinical sign of dehydration in veterinary patients?

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

Correct answer: Bradycardia

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

Question 40: Which of the following is the MOST accurate method to confirm correct endotracheal tube placement?

• Auscultation of breath sounds bilaterally
• Capnography showing a normal waveform (Correct answer)
• Watching chest rise
• Visualization of the tube passing through the larynx

Correct answer: Capnography showing a normal waveform

Capnography demonstrating a consistent CO2 waveform is the gold standard for confirming endotracheal intubation, as esophageal placement will not produce a waveform.

Question 41: Before administering medication via a nasogastric tube, the technician must first:

• 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
• Flush immediately with 20 mL of warm saline

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 42: Which QC procedure should be performed each time a new lot of reagent strips is opened for urinalysis?

• Recalibrate the spectrophotometer
• Run a serum control sample
• Run positive and negative control solutions (Correct answer)
• Perform a specific gravity comparison with a refractometer

Correct answer: Run positive and negative control solutions

Running both positive and negative controls verifies that the new reagent strip lot is performing correctly before patient samples are tested.

Question 43: A patient under anesthesia has a mean arterial pressure (MAP) of 48 mmHg. Which intervention should be attempted FIRST?

• Reduce the anesthetic agent concentration (Correct answer)
• Administer epinephrine IV bolus
• Administer dopamine CRI
• Increase fresh gas flow rate

Correct answer: Reduce the anesthetic agent concentration

Reducing the inhalant anesthetic concentration is the first step since most inhalants cause dose-dependent cardiovascular depression; this is the most direct corrective action.

Question 44: 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 I
• ASA II
• ASA IV (Correct answer)
• ASA V

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 45: Which of the following statements DOES NOT describe strangles?

• A contagious disease of horses caused by Streptococcus equi var equi
• A bacterial disease of horses that can be prevented with vaccination
• An autoimmune disease of dogs causing a skin disorder
• In dogs, it is also known as distemper (Correct answer)

Correct answer: In dogs, it is also known as distemper

Streptococcus equi var equi can be transmitted directly or indirectly and causes an inflammatory response that results in fever, dysphagia, anorexia, stridor, nasal discharge, and lymphadenopathy, though associated symptoms are not always present. Vaccines are available and advised where strangles is endemic or when horses are expected to be at high risk. Puppy strangles, also known as juvenile cellulitis, sterile granulomatous dermatitis, and lymphadenitis, is a rare immune system disorder that affects pups between the ages of 3 weeks and 4 months. The face swells noticeably. The disease requires high doses of corticosteroids to be treated. The illness does not return after it has been treated. Canine distemper is not bacterial; it is viral.

Question 46: Which reversal agent is used to antagonize the effects of medetomidine in dogs?

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

Correct answer: Atipamezole

Atipamezole is a selective alpha-2 adrenergic antagonist used to reverse the sedative and cardiovascular effects of medetomidine and dexmedetomidine.

Question 47: 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?

• Motion artifact; the patient should be sedated for a retake.
• Scatter radiation; a grid should be used for the retake. (Correct answer)
• 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 48: Which of the following is a zoonotic disease that can be detected on fecal examination?

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

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

• Normal
• Hypothermia
• Mild to moderate hyperthermia (Correct answer)
• 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 50: During an abdominal exploratory surgery on a 6-year-old Golden Retriever, the patient's end-tidal CO2 (ETCO2) level sharply increases from 40 mm Hg to 65 mm Hg. The patient's other vital signs remain stable. What is the most likely cause of this change?

• The patient is hypoventilating. (Correct answer)
• The endotracheal tube is obstructed.
• There is a sudden drop in cardiac output.
• The patient is becoming too light under anesthesia.

Correct answer: The patient is hypoventilating.

An elevated ETCO2, or hypercapnia, is a primary indicator of hypoventilation, meaning the patient is not eliminating carbon dioxide effectively. If the patient were too light, you would likely see an increase in heart rate and respiratory rate. An obstructed endotracheal tube would likely cause a drop in ETCO2 or an abnormal waveform. A drop in cardiac output would typically lead to a decrease in ETCO2.

Question 51: Which local anesthetic has the longest duration of action and is commonly used for nerve blocks in large animals?

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

Correct answer: Bupivacaine

Bupivacaine has the longest duration of action among common local anesthetics (up to 6-8 hours) and is used for prolonged nerve blocks in horses and cattle.

Question 52: The preferred position for a patient in respiratory distress to maximize lung expansion is:

• Sternal recumbency (Correct answer)
• Left lateral recumbency
• Dorsal recumbency
• Trendelenburg position

Correct answer: Sternal recumbency

Sternal recumbency allows gravity to assist diaphragmatic movement and provides the greatest functional residual capacity in the lungs.

Question 53: 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?

• 15 tablets
• 5 tablets
• 20 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 54: What is the mechanism by which metronidazole kills anaerobic bacteria?

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

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 55: Which of the following fecal flotation solutions has the highest specific gravity and is therefore most effective at floating heavy parasite eggs, such as Trichuris vulpis?

• Zinc sulfate solution
• Sodium nitrate solution
• Sodium chloride solution
• Sheather's sugar solution (Correct answer)

Correct answer: Sheather's sugar solution

Sheather's sugar solution typically has a specific gravity of around 1.27, which is higher than most standard salt solutions like zinc sulfate (1.18-1.20) or sodium nitrate (1.18-1.20). This higher density is more effective for floating heavier parasite eggs, like those of the whipworm (Trichuris spp.), which might be missed with solutions of lower specific gravity.

Question 56: On ultrasound, which tissue characteristic causes acoustic shadowing?

• Air pockets within parenchyma
• Highly attenuating or reflective materials such as calculi or bone (Correct answer)
• Soft tissue with uniform density
• Fluid-filled structures

Correct answer: Highly attenuating or reflective materials such as calculi or bone

Calculi, bone, and other highly reflective or attenuating materials block the ultrasound beam, creating a dark shadow artifact distal to the object.

Question 57: A 10 kg dog needs a CRI (constant rate infusion) of fentanyl at 5 mcg/kg/hr. How many mcg/hr should the infusion deliver?

• 100 mcg/hr
• 75 mcg/hr
• 25 mcg/hr
• 50 mcg/hr (Correct answer)

Correct answer: 50 mcg/hr

10 kg × 5 mcg/kg/hr = 50 mcg/hr required for the infusion.

Question 58: A surgical technician notices a small hole in the outer wrap of a sterile pack before opening it for surgery. What is the correct action?

• Use the pack if the inner wrap is intact
• Consider the pack non-sterile and obtain a new one (Correct answer)
• Open the pack and inspect the contents for contamination
• Re-sterilize the outer wrap with alcohol

Correct answer: Consider the pack non-sterile and obtain a new one

Any breach in sterile packaging compromises the sterility of the contents, and the pack must be considered contaminated.

Question 59: What is the primary purpose of using a Romanowsky-type stain (e.g., Diff-Quik) on a blood smear?

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

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 60: What is the primary pharmacological effect of dexmedetomidine?

• NMDA receptor antagonism causing dissociation
• Alpha-2 adrenergic receptor agonism causing sedation, analgesia, and muscle relaxation (Correct answer)
• GABA-A receptor potentiation causing sedation
• Mu-opioid receptor agonism causing analgesia and sedation

Correct answer: Alpha-2 adrenergic receptor agonism causing sedation, analgesia, and muscle relaxation

Dexmedetomidine is a highly selective alpha-2 adrenergic agonist that produces dose-dependent sedation, analgesia, and muscle relaxation.

Question 61: A rabbit is anesthetized and becomes apneic. Which route is MOST appropriate for emergency drug administration if IV access is not available?

• Subcutaneous
• Intraosseous (Correct answer)
• Intracardiac
• Intramuscular

Correct answer: Intraosseous

The intraosseous (IO) route provides rapid access to the systemic circulation in emergencies when IV access cannot be established, delivering drugs with similar speed to IV.

Question 62: Which type of drug interaction occurs when two drugs compete for the same plasma protein binding sites, potentially increasing free drug levels?

• Receptor downregulation
• Enzyme induction
• 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 63: A cat recovering from an ovariohysterectomy is shivering and has a rectal temperature of 96°F (35.6°C). The BEST immediate intervention is:

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

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

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

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 65: Which radiographic sign describes air within the intestinal wall (intramural gas) seen in necrotizing enterocolitis or emphysematous gastritis?

• Pneumatosis intestinalis (Correct answer)
• Pneumoperitoneum
• Mechanical obstruction
• Ileus pattern

Correct answer: Pneumatosis intestinalis

Pneumatosis intestinalis refers to gas trapped within the intestinal wall layers, which is a grave sign indicating bowel necrosis or severe mucosal compromise.

Question 66: A veterinary technician is performing a urinalysis and observes colorless, rectangular, prism-like crystals that resemble "coffin lids." These crystals are most likely:

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

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 67: Which anesthetic agent is most appropriate for a patient with suspected increased intracranial pressure?

• Acepromazine
• Ketamine
• Tiletamine-zolazepam
• Propofol (Correct answer)

Correct answer: Propofol

Propofol decreases intracranial pressure and cerebral metabolic rate, making it preferable in patients with head trauma or intracranial disease.

Question 68: What is the normal gingival sulcus depth in a healthy cat?

• 1–3 mm (Correct answer)
• 3–5 mm
• 5–7 mm
• 0–1 mm

Correct answer: 1–3 mm

In cats, a normal gingival sulcus depth is 0–1 mm; depths greater than 1 mm suggest periodontal pocketing.

Question 69: When monitoring a patient under general anesthesia, which parameter BEST reflects the adequacy of ventilation?

• Heart rate
• End-tidal CO2 (EtCO2) (Correct answer)
• Blood pressure
• Pulse oximetry (SpO2)

Correct answer: End-tidal CO2 (EtCO2)

End-tidal CO2 directly reflects the patient's ventilatory status by measuring CO2 elimination at the end of each breath.

Question 70: Which finding on a urinalysis sediment is pathognomonic for ethylene glycol toxicity in cats?

• Calcium oxalate monohydrate crystals (hippurate-shaped) (Correct answer)
• Struvite crystals
• Bilirubin crystals
• Uric acid 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 71: Which anesthetic monitoring parameter MOST directly reflects cardiac output during surgery?

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

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 72: A technician must reconstitute a vial of ampicillin powder. The label states 'add 9.6 mL sterile water to yield 10 mL of 250 mg/mL solution.' What does this process describe?

• Compounding
• Titration
• Reconstitution (Correct answer)
• Dilution

Correct answer: Reconstitution

Reconstitution is the process of adding a diluent to a lyophilized (freeze-dried) powder to prepare it for injection or use.

Question 73: Which electrolyte abnormality is most commonly associated with urethral obstruction in cats?

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

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 74: Atropine is classified as which type of drug?

• Alpha-2 adrenergic agonist
• Nicotinic receptor agonist
• Beta-1 adrenergic antagonist
• 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 75: Which crystalloid fluid is MOST commonly recommended as the standard maintenance fluid during routine anesthesia in dogs and cats?

• 0.9% Normal saline
• 3% Hypertonic saline
• Lactated Ringer's solution (LRS) (Correct answer)
• 5% Dextrose in water (D5W)

Correct answer: Lactated Ringer's solution (LRS)

Lactated Ringer's solution is the most commonly recommended balanced isotonic crystalloid for routine anesthetic maintenance fluid therapy in small animals.

Question 76: A dog's packed cell volume (PCV) is 18%. This result indicates:

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

Correct answer: Anemia

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

Question 77: 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:

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

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

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

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

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

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 80: A veterinarian prescribes Clomicalm® (clomipramine hydrochloride) for a dog with separation anxiety. Which of the following is a potential side effect that the owner should be counseled about?

• Polyphagia
• Lethargy or sedation (Correct answer)
• Hyperactivity
• Increased aggression

Correct answer: Lethargy or sedation

Clomipramine is a tricyclic antidepressant. One of the most common side effects, especially during the initial phase of treatment, is lethargy or sedation. While other side effects like vomiting or changes in appetite can occur, sedation is frequently observed as the animal adjusts to the medication. Increased aggression is not a typical side effect and the drug is not recommended for treating aggression.

Question 81: 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 electrical impedance created as cells pass through an aperture.
• The scattering of a light beam by suspended particles.
• The absorption of specific light wavelengths by solutes.
• The bending of light as it passes through a fluid containing dissolved solids. (Correct answer)

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 82: A 20 kg dog is assessed to be 10% dehydrated. What is the calculated fluid deficit that should be replaced?

• 20 mL
• 500 mL
• 200 mL
• 2,000 mL (Correct answer)

Correct answer: 2,000 mL

Fluid deficit = body weight (kg) × % dehydration × 1,000 mL = 20 × 0.10 × 1,000 = 2,000 mL.

Question 83: 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?

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

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 84: During equine anesthesia in dorsal recumbency, the horse develops hypoxemia despite 100% oxygen delivery. What is the most likely cause?

• Malignant hyperthermia
• Ventilation-perfusion mismatch (Correct answer)
• Carbon monoxide poisoning
• Equipment failure

Correct answer: Ventilation-perfusion mismatch

Dorsal recumbency in horses causes significant V/Q mismatch because the weight of abdominal organs compresses the dependent lung, impairing gas exchange.

Question 85: 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 86: Which of the following is a CONTRAINDICATION to the use of ketamine as the sole induction agent in cats?

• Orthopedic surgery
• Dental prophylaxis
• Routine castration
• Hypertrophic cardiomyopathy (HCM) (Correct answer)

Correct answer: Hypertrophic cardiomyopathy (HCM)

Ketamine increases heart rate and myocardial oxygen demand, which is dangerous in cats with hypertrophic cardiomyopathy (HCM) where the heart cannot compensate.

Question 87: Which of the following correctly describes the 'scrubbed' role versus the 'circulating' role in the surgical team?

• The scrubbed technician is sterile and handles instruments; the circulator is non-sterile and handles non-sterile tasks (Correct answer)
• Both roles are sterile during the procedure
• The circulator passes sterile instruments directly to the surgeon
• The scrubbed technician opens sterile packages from outside the field

Correct answer: The scrubbed technician is sterile and handles instruments; the circulator is non-sterile and handles non-sterile tasks

The scrubbed (sterile) technician is gowned and gloved, handling sterile instruments, while the circulator remains non-sterile to manage the OR environment and open supplies.

Question 88: A Collie presents with severe neurological signs, including ataxia and seizures, after receiving a high dose of ivermectin for mange treatment. This adverse reaction is most likely due to a mutation in which gene?

• CYP2D15
• MDR1 (ABCB1) (Correct answer)
• COX-2
• NK-1

Correct answer: MDR1 (ABCB1)

Certain breeds, particularly Collies and related breeds, can have a mutation in the Multidrug Resistance Gene (MDR1), also known as the ABCB1 gene. This gene codes for P-glycoprotein, a transport pump that is part of the blood-brain barrier and actively removes certain drugs, like ivermectin, from the brain. A defective gene leads to the accumulation of the drug in the central nervous system, causing neurotoxicity.

Question 89: Which of the following accurately describes 'bioavailability'?

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

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

• To-and-fro system
• Mapleson F (Norman Elbow) system (Correct answer)
• Large animal circle system
• Circle rebreathing 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 91: The zona contaminata in surgery refers to:

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

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

• To increase rebreathing of CO2
• To eliminate the need for a CO2 absorber in large animals
• To allow non-rebreathing with high fresh gas flows (Correct answer)
• 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 93: A 10-year-old male cat is presented to the emergency clinic for straining to urinate with no urine production for the past 12 hours. Upon examination, he is bradycardic (110 bpm), and his bladder is large and firm. Which of the following is the most immediate life-threatening concern for this patient?

• Post-renal azotemia
• Severe bladder pain
• Life-threatening hyperkalemia (Correct answer)
• Potential for bladder rupture

Correct answer: Life-threatening hyperkalemia

While azotemia, pain, and bladder rupture are all serious concerns, severe hyperkalemia (high potassium) is the most immediate threat to life. Urethral obstruction prevents the excretion of potassium, which leads to toxic levels in the blood, causing severe bradycardia and potentially fatal cardiac arrhythmias.

Question 94: According to Drug Enforcement Administration rules, pentobarbital, fentanyl, and hydromorphone fall under which of the following categories of banned substances?

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

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 95: When using a standard refractometer in a veterinary clinic, which two measurements are most commonly performed?

• Urine specific gravity and total protein (Correct answer)
• Blood urea nitrogen and creatinine
• Blood glucose and packed cell volume
• Urine pH and ketone levels

Correct answer: Urine specific gravity and total protein

A clinical refractometer is a standard piece of equipment used to measure the refractive index of a fluid. In veterinary practice, its primary uses are to determine the urine specific gravity (USG), which assesses the concentrating ability of the kidneys, and the total protein (TP) or total solids in plasma or serum.

Question 96: What does the term 'left shift' mean on a CBC differential?

• Increased immature neutrophils (bands) in circulation (Correct answer)
• Decreased total white blood cell count
• Shift of platelets to smaller size
• Increased eosinophil count

Correct answer: Increased immature neutrophils (bands) in circulation

A left shift refers to the presence of increased band neutrophils or earlier precursors in peripheral blood, indicating bone marrow release in response to increased demand.

Question 97: What is the purpose of a surgical drape fenestration?

• To allow ventilation over the surgical site
• To provide a pocket for holding instruments
• To expose only the prepared surgical site while covering surrounding areas (Correct answer)
• To mark the incision line

Correct answer: To expose only the prepared surgical site while covering surrounding areas

The fenestration (opening) in a surgical drape isolates the sterile operative field from the non-sterile surrounding patient area.

Question 98: During anesthesia, a patient's SpO2 reading suddenly drops to 85% but mucous membranes appear pink. What is the most likely cause of this discrepancy?

• Anemia causing falsely low readings
• True hypoxemia requiring immediate oxygen supplementation
• Carbon monoxide poisoning
• Pulse oximeter sensor artifact or poor probe placement (Correct answer)

Correct answer: Pulse oximeter sensor artifact or poor probe placement

A discrepancy between low SpO2 and normal clinical appearance often indicates probe malposition, movement artifact, or poor perfusion at the sensor site rather than true hypoxemia.

Question 99: What are the standard time, temperature, and pressure settings for sterilizing most routine surgical packs in a gravity-displacement steam autoclave?

• 10 minutes at 115°C (240°F) and 10 psi
• 20 minutes at 100°C (212°F) and 20 psi
• 15 minutes at 121°C (250°F) and 15 psi (Correct answer)
• 5 minutes at 132°C (270°F) and 30 psi

Correct answer: 15 minutes at 121°C (250°F) and 15 psi

The generally accepted standard for steam sterilization in a gravity-displacement autoclave is exposure to 121°C (250°F) at a pressure of 15 psi for a minimum of 13-15 minutes. The 5-minute cycle is typically reserved for "flash" sterilization of unwrapped instruments in a pre-vacuum sterilizer.

Question 100: 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?

• 1.0 mL
• 5.0 mL
• 0.05 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 101: During a veterinary dental procedure, which anesthetic monitoring parameter is especially important to watch due to the risk of bradycardia?

• Heart rate and rhythm (Correct answer)
• Blood glucose
• Packed cell volume
• End-tidal CO2

Correct answer: Heart rate and rhythm

Dental procedures can stimulate the trigeminal nerve causing vagally mediated bradycardia, making heart rate monitoring critical throughout.

Question 102: A patient is receiving aminoglycoside antibiotics. Which parameter is most important to monitor for toxicity?

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

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

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

Correct answer: 37–55%

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

Question 104: What does Grade 2 furcation exposure indicate in a dog with periodontal disease?

• The probe passes completely through the furcation
• The probe enters the furcation but does not pass through (Correct answer)
• The furcation can be detected but the probe does not enter
• No furcation involvement is present

Correct answer: The probe enters the furcation but does not pass through

Grade 2 (F2) furcation involvement means the periodontal probe enters the furcation but cannot pass all the way through to the other side.

Question 105: What is the recommended minimum distance a non-PPE-wearing person should stand from the primary X-ray beam during a radiographic exposure in a clinical setting?

• 2 meters
• 1 meter
• 3 meters (Correct answer)
• 6 feet

Correct answer: 3 meters

NCRP guidelines recommend non-PPE personnel stand at least 2 meters (approximately 6 feet) from the X-ray tube and the primary beam during an exposure.

Question 106: On thoracic radiographs, which cardiac measurement is used to assess heart size in dogs?

• Cardiac silhouette index (CSI)
• Thoracic volume ratio (TVR)
• Cardiothoracic ratio (CTR)
• Vertebral heart score (VHS) (Correct answer)

Correct answer: Vertebral heart score (VHS)

The vertebral heart score (VHS) compares the sum of the long and short cardiac axes to vertebral body lengths starting at T4, with >10.5 considered enlarged in most dogs.

Question 107: Which coagulation test evaluates the extrinsic and common pathways?

• Activated clotting time (ACT)
• Activated partial thromboplastin time (aPTT)
• Prothrombin time (PT) (Correct answer)
• Buccal mucosal bleeding time (BMBT)

Correct answer: Prothrombin time (PT)

Prothrombin time (PT) evaluates the extrinsic (factor VII) and common (factors X, V, II, fibrinogen) pathways of coagulation.

Question 108: A veterinary technician is preparing a surgical pack for autoclaving. Which of the following is an essential step to ensure effective steam sterilization?

• Leaving the box locks on all hinged instruments in the closed and locked position.
• Placing a sterile indicator strip deep inside the most densely packed area. (Correct answer)
• Tightly sealing the pack with non-porous tape to prevent contamination.
• Using a plastic container to hold the instruments within the wrap.

Correct answer: Placing a sterile indicator strip deep inside the most densely packed area.

A sterile indicator strip must be placed in the center or most challenging part of the pack to verify that steam has penetrated and achieved the necessary conditions for sterilization. Tightly sealing with non-porous tape would prevent steam penetration. Plastic containers are generally not used as they can melt or prevent steam contact. Box locks on instruments must be left open to allow steam to contact all surfaces.

Question 109: 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
• Heinz bodies (Correct answer)
• Howell-Jolly bodies
• 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.

Question 110: A serum biochemistry panel shows markedly elevated ALT and AST with mildly elevated ALP in a dog. This pattern is MOST consistent with:

• Pancreatic disease
• Primary cholestasis
• Hepatocellular damage or necrosis (Correct answer)
• Renal failure

Correct answer: Hepatocellular damage or necrosis

ALT and AST are hepatocellular enzymes released when liver cells are damaged or necrotic, whereas ALP elevation is more pronounced with cholestasis.

Question 111: Guinea pigs must always have access to?

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

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 112: What are all the Alternaria species, grain mite eggs, and Planarian?

• Spurious parasites
• Parasites of geese
• Pseudoparasites (Correct answer)
• Parasites of chicken

Correct answer: Pseudoparasites

When discovered in feces or blood, pseudoparasites are mistaken for parasites but are not parasites. Various Alternaria species, free-living nematodes, grain mite eggs, Planarian, and pollen grains are examples of fecal pseudoparasites. A real parasite in one or more species, but not the one in which it is detected, is referred to as a spurious parasite. When an animal consumes invertebrates that have the parasite's larval stages or the excrement of infected animals, spurious parasites can be discovered.

Question 113: Which of the following is a reversal agent for benzodiazepine sedation?

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

Correct answer: Flumazenil

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

Question 114: Which antiparasitic drug works by disrupting the nervous system of invertebrates by potentiating glutamate-gated chloride channels?

• Pyrantel pamoate
• Ivermectin (Correct answer)
• Praziquantel
• Fenbendazole

Correct answer: Ivermectin

Ivermectin (a macrocyclic lactone) potentiates glutamate-gated chloride channels in invertebrates, causing hyperpolarization and paralysis of parasites.

Question 115: 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 outline the gastrointestinal tract to assess motility, and identify mucosal lesions or obstructions. (Correct answer)
• To perform a double-contrast study of the urinary bladder.
• To visualize the spinal cord for signs of compression.
• To evaluate renal perfusion and excretion.

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 116: Which drug is most commonly used to treat hyperthyroidism in cats?

• Methimazole (Correct answer)
• Levothyroxine
• Propranolol
• Prednisone

Correct answer: Methimazole

Methimazole (Tapazole) inhibits thyroid hormone synthesis and is the most common medical treatment for feline hyperthyroidism.

Question 117: Which drug is the antidote for acetaminophen toxicity in cats?

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

Correct answer: N-acetylcysteine

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

Question 118: Which MRI sequence is most useful for detecting fluid (such as edema or joint effusion) due to its bright fluid signal?

• T1-weighted
• T2-weighted (Correct answer)
• STIR (Short Tau Inversion Recovery)
• Proton density

Correct answer: T2-weighted

T2-weighted sequences produce a bright (hyperintense) signal from fluid, making them ideal for identifying edema, joint effusions, spinal cord lesions, and other fluid-containing structures.

Question 119: In digital radiography, what does the term 'exposure index' indicate?

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

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 120: Which drug class is CONTRAINDICATED in patients with pheochromocytoma undergoing anesthesia?

• Benzodiazepines
• Propofol
• Acepromazine (Correct answer)
• Opioids

Correct answer: Acepromazine

Acepromazine blocks alpha-adrenergic receptors, which can unmask beta-adrenergic effects of catecholamines from a pheochromocytoma, causing severe hypotension and tachycardia.

Question 121: During ophthalmic surgery on a dog, the anesthetist observes sudden severe bradycardia. The MOST likely cause is:

• Light anesthetic plane
• Hyperthermia
• Oculocardiac reflex triggered by traction on the globe or extraocular muscles (Correct answer)
• Hyperkalemia from IV fluids

Correct answer: Oculocardiac reflex triggered by traction on the globe or extraocular muscles

The oculocardiac reflex (trigeminal-vagal arc) causes bradycardia when pressure or traction is applied to the globe or periorbital structures.

Question 122: Which of the following should be mentioned as a crucial post-operative instruction after an ovariohysterectomy?

• Return for intradermal suture removal in 5 days
• Maximize movement to limit stiffness
• 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 123: A puppy is admitted with severe hemorrhagic diarrhea, vomiting, and leukopenia. The most critical component of treatment for suspected parvoviral enteritis is:

• Emergency abdominal surgery
• Immediate whole blood transfusion
• Antiviral medication administration
• IV fluid therapy and supportive care (Correct answer)

Correct answer: IV fluid therapy and supportive care

Parvoviral enteritis treatment is primarily supportive, with aggressive IV fluid therapy being the cornerstone to correct dehydration and electrolyte imbalances.

Question 124: 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)
• Anesthetic overdose
• Decreased cardiac output
• Hypothermia

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

• Sevoflurane
• Isoflurane
• Desflurane
• 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 126: Which instrument is used to hold tissue apart and maintain exposure of the surgical field without requiring the surgeon to hold it continuously?

• Metzenbaum scissors
• Babcock forceps
• Allis tissue forceps
• Gelpi retractor (Correct answer)

Correct answer: Gelpi retractor

Self-retaining retractors such as the Gelpi hold tissue open automatically, freeing the surgeon's hands during the procedure.

Question 127: A veterinary technician is setting up for a feline ovariohysterectomy (OHE). Which instrument is used to tent and elevate the uterine horn for ligature placement?

• Snook hook (spay hook) (Correct answer)
• Senn retractor
• Backhaus clamp
• Allis forceps

Correct answer: Snook hook (spay hook)

The Snook hook (spay hook) is specifically designed to locate and elevate the uterine horn through a small abdominal incision during an OHE.

Question 128: Which of the following categories includes every sickness that is reported?

• Rinderpest, sheep pox virus, toxoplasmosis, feline infectious peritonitis
• Anthrax, coronavirus, Marek's disease, ascariasis
• Bluetongue, paratuberculosis, Rift Valley fever, lumpy skin disease (Correct answer)
• Camel pox virus, Q fever, trichinellosis, feline immunodeficiency virus

Correct answer: Bluetongue, paratuberculosis, Rift Valley fever, lumpy skin disease

On the CDC, USDA, and state websites, you can find comprehensive listings of diseases that are reportable for all species. Bluetongue, paratuberculosis, Rift Valley fever, lumpy skin disease, anthrax, Marek's disease, rinderpest, sheep pox virus, camel pox virus, Q fever, and trichinellosis are among the illnesses that must be reported.

Question 129: 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)
• Hyperechoic
• Heterogeneous
• Isoechoic

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 130: Which serum chemistry value is most useful for evaluating glomerular filtration rate (GFR) in cats?

• Total protein
• Amylase
• ALT
• SDMA (symmetric dimethylarginine) (Correct answer)

Correct answer: SDMA (symmetric dimethylarginine)

SDMA is a sensitive renal biomarker that reflects GFR and can detect kidney dysfunction earlier than creatinine in cats.

Question 131: When performing a blood smear, the feathered edge is used to evaluate:

• Red blood cell indices
• Packed cell volume
• Reticulocyte count
• Platelet clumps and large cells (Correct answer)

Correct answer: Platelet clumps and large cells

The feathered edge of a blood smear is where platelets tend to clump and large cells such as monocytes accumulate, making it an important area to scan.

Question 132: On an ultrasound of the canine abdomen, which structure typically appears as a hyperechoic line with acoustic shadowing in the right cranial abdomen?

• The right kidney cortex
• The portal vein wall
• Gas within the duodenum (Correct answer)
• The gallbladder 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 133: Which statement about radiation safety in the surgical suite (e.g., C-arm fluoroscopy) is CORRECT?

• Lead aprons protect against scatter radiation but should be folded when stored
• Standing directly behind the X-ray source is the safest position
• Dosimetry badges are worn under the lead apron at waist level
• Lead aprons should be stored flat or on a hanger and never folded to prevent cracking (Correct answer)

Correct answer: Lead aprons should be stored flat or on a hanger and never folded to prevent cracking

Lead aprons must be stored flat or hung on dedicated racks; folding creates cracks in the lead lining that reduce radiation protection.

Question 134: 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?

• 120-150 compressions per minute, compressing the chest by 1/2 to 2/3 its width.
• 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.
• 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 135: Which of the following is a requirement for legally maintaining controlled substance logs in a veterinary practice?

• Logs for all schedules can be kept in a single binder.
• Records for Schedule II drugs must be kept separate from Schedules III, IV, and V. (Correct answer)
• Only the dispensing veterinarian is permitted to make entries in the log.
• All controlled substance logs must be submitted to the DEA monthly.

Correct answer: Records for Schedule II drugs must be kept separate from Schedules III, IV, and V.

DEA regulations require that records for Schedule II controlled substances be maintained separately from all other controlled substance records. This ensures stricter tracking of drugs with the highest potential for abuse.

Question 136: What is the recommended action if a patient shows signs of a contrast reaction (vomiting, urticaria, hypotension) during an IV urogram?

• Discontinue contrast administration and treat symptomatically (Correct answer)
• Increase the injection rate to speed up the study
• Administer more contrast to flush the kidneys
• Continue the study and monitor

Correct answer: Discontinue contrast administration and treat symptomatically

Signs of contrast reaction require immediate discontinuation of the contrast agent and symptomatic treatment including IV fluids, antihistamines, and epinephrine if anaphylaxis develops.

Question 137: During abdominal ultrasound, the spleen of a dog appears diffusely hyperechoic compared to the liver. This finding is MOST consistent with:

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

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

• Infraorbital nerve block (Correct answer)
• Mandibular nerve block
• Mental nerve block
• Retrobulbar 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 139: Which radiographic view is best for evaluating the trachea and mainstem bronchi in a dog?

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

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 140: Which organ is considered the acoustic window used to visualize the heart during echocardiography in most small animals?

• Lung
• Spleen
• Liver
• Chest wall and intercostal spaces (Correct answer)

Correct answer: Chest wall and intercostal spaces

The ultrasound probe is placed in the intercostal spaces of the chest wall where air-filled lungs are displaced, providing a direct acoustic window to the heart.

Question 141: 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 I
• Schedule II
• Schedule III (Correct answer)
• Schedule V

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 142: Which of the following is the CORRECT placement site for a pulse oximeter probe in an anesthetized dog?

• Dorsal pedal artery
• Corneal surface
• Dorsal surface of the carpus
• Lingual (tongue) mucosa (Correct answer)

Correct answer: Lingual (tongue) mucosa

The tongue is one of the most reliable sites for pulse oximetry in dogs because of good tissue perfusion and minimal pigmentation interference.

Question 143: Which of the following suture removal timelines is appropriate for a routine skin closure on the trunk of a dog?

• 3–5 days
• 28 days
• 14–21 days
• 7–10 days (Correct answer)

Correct answer: 7–10 days

Skin sutures on the trunk of a dog are typically removed at 7–10 days once adequate tensile strength has been achieved by the healing tissue.

Question 144: Which statement regarding recombinant human erythropoietin (rh-EPO) is FALSE?

• The maximum dose of rh-EPO that should be given to a dog or cat is 100 U/kg. (Correct answer)
• There is a high incidence of antibody formation to rh-EPO in dogs and cats.
• rh-EPO should be given to dogs and cats three times weekly until the target PCV is reached.
• rh-EPO is indicated in canine and feline patients with renal disease and a PCV of 25% or less.

Correct answer: The maximum dose of rh-EPO that should be given to a dog or cat is 100 U/kg.

rh-EPO is a treatment for anemia in both humans and animals with chronic renal failure. It is prescribed at doses of 50-100 U/kg 3 times per week subcutaneously until the goal PCV is reached and is appropriate when the PCV declines to 25% or below. To track progress, patient PCV should be measured twice a week. Rh-EPO may be administered twice weekly once the target PCV is attained. A larger dose of rh-EPO may be administered to non-responsive patients. The dose can be raised in increments of 25–50 U/kg. Although there is no known maximum dose, weekly doses of up to 1050 U/kg have been documented. Reticulocytosis and a daily PCV rise of 0.5%–1.0% are present in responsive patients. In both dogs and cats, the occurrence of antibody production is very common.

Question 145: Which of the following correctly describes the difference between sterilization and disinfection?

• Sterilization destroys all microorganisms including spores; disinfection reduces microbial numbers but may not eliminate spores (Correct answer)
• Both terms are interchangeable in a surgical context
• Disinfection is used on living tissue; sterilization is used only on metals
• Sterilization kills only vegetative bacteria; disinfection kills all microorganisms including spores

Correct answer: Sterilization destroys all microorganisms including spores; disinfection reduces microbial numbers but may not eliminate spores

Sterilization achieves complete destruction of all microorganisms including spores, while disinfection reduces the microbial load but may not eliminate resistant spores.

Question 146: A 5-year-old healthy beagle is undergoing a routine dental cleaning under general anesthesia with isoflurane. The veterinary technician notes the patient's heart rate has dropped to 50 bpm. Which of the following drugs would be the most appropriate to administer to treat this bradycardia?

• Acepromazine
• Hydromorphone
• Diazepam
• Glycopyrrolate (Correct answer)

Correct answer: Glycopyrrolate

Glycopyrrolate is an anticholinergic drug used to treat or prevent bradycardia by blocking the effects of the parasympathetic nervous system on the heart. It has a slower onset but longer duration than atropine, making it suitable for this scenario. Diazepam is a benzodiazepine for sedation/anxiety, hydromorphone is an opioid for pain, and acepromazine is a tranquilizer that can cause vasodilation, none of which directly treat bradycardia.

Question 147: A patient draped for surgery moves and breaks the sterile field. The appropriate response is:

• Apply extra antiseptic to the exposed area and continue
• Continue surgery if only one drape shifted
• Re-drape the patient with new sterile drapes before continuing (Correct answer)
• Document the event and proceed

Correct answer: Re-drape the patient with new sterile drapes before continuing

Any break in the sterile field requires re-establishing sterility with new sterile drapes before the procedure continues.

Question 148: Which of the following correctly describes the pharmacokinetic term 'half-life'?

• The time required for the plasma concentration of a drug to decrease by 50% (Correct answer)
• The time for a drug to reach maximum plasma concentration
• The fraction of administered drug that reaches systemic circulation
• The volume in which a drug distributes in the body

Correct answer: The time required for the plasma concentration of a drug to decrease by 50%

Half-life (t½) is the time required for the drug's plasma concentration to decrease by 50%, determining dosing intervals and time to steady state.

Question 149: 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 II
• ASA IV (Correct answer)
• ASA V
• 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 150: When preparing a surgical site using a chlorhexidine scrub, how many alternating scrub-and-rinse cycles are recommended before applying the final antiseptic?

• 3 (Correct answer)
• 5
• 1
• 2

Correct answer: 3

Three alternating scrub-and-rinse cycles with chlorhexidine or povidone-iodine are the standard to achieve adequate skin antisepsis.

Question 151: 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?

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

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

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

Correct answer: Beta-lactams

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

Question 153: Which phase of wound healing is characterized by fibroblast proliferation and collagen deposition?

• Hemostatic phase
• Inflammatory phase
• Remodeling phase
• Proliferative (repair) phase (Correct answer)

Correct answer: Proliferative (repair) phase

The proliferative phase involves fibroblast migration and collagen synthesis, building the structural framework of the healing wound.

Question 154: A patient receiving IV fluids develops swelling and coolness at the catheter insertion site. This most likely indicates:

• Air embolism
• Thrombosis
• Phlebitis
• Perivascular fluid infiltration (Correct answer)

Correct answer: Perivascular fluid infiltration

Perivascular infiltration (extravasation) occurs when fluid leaks out of the vein into surrounding tissue, causing local swelling and coolness.

Question 155: Which anesthetic complication is MOST associated with brachycephalic breeds undergoing general anesthesia?

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

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

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

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 157: Which artifact on MRI appears as alternating bright and dark bands and is caused by motion during image acquisition?

• Aliasing (wraparound) artifact
• Chemical shift artifact
• Susceptibility artifact
• Ghosting (motion artifact) (Correct answer)

Correct answer: Ghosting (motion artifact)

Ghosting or motion artifact creates ghost images or banding in the phase-encode direction due to periodic motion (e.g., breathing, cardiac pulsation) during the MRI acquisition.

Question 158: 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:

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

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 159: A dog on long-term corticosteroid therapy suddenly stops receiving the medication. What is the primary risk?

• Adrenal insufficiency due to HPA axis suppression (Correct answer)
• Acute liver failure
• Hyperthyroidism rebound
• Sudden nephrotoxicity

Correct answer: Adrenal insufficiency due to HPA axis suppression

Prolonged exogenous corticosteroid use suppresses the hypothalamic-pituitary-adrenal (HPA) axis, and abrupt withdrawal can cause life-threatening adrenal insufficiency.

Question 160: Which drug is used to reverse benzodiazepine sedation in veterinary patients?

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

Correct answer: Flumazenil

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

Question 161: Which drug is used to treat Giardia infections in dogs and cats?

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

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

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

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

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

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

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

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

• Gloves are opened by the scrub tech and held for the surgeon
• 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

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

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

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 167: Which stain is routinely used to identify Mycoplasma haemofelis on a feline blood smear?

• Wright-Giemsa stain (Correct answer)
• Gram stain
• Acid-fast stain
• India ink

Correct answer: Wright-Giemsa stain

Wright-Giemsa stain reveals Mycoplasma haemofelis as small basophilic bodies attached to the surface of feline erythrocytes.

Question 168: 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?

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

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

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

Correct answer: Hyperkalemia

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

Question 170: Which adverse effect is most associated with chronic NSAID use in dogs?

• Gastrointestinal ulceration (Correct answer)
• Respiratory depression
• Hyperthyroidism
• Cardiac arrhythmias

Correct answer: Gastrointestinal ulceration

Chronic NSAID use inhibits COX-1, reducing protective prostaglandins in the GI tract and predisposing patients to ulcers.

Question 171: 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:

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

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 172: 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 173: During a splenectomy, the circulating nurse notices a sponge count discrepancy. The CORRECT immediate action is to:

• Remove all drapes and restart the count
• Complete the closure and recount after surgery
• Notify the surgeon immediately so the body cavity can be searched (Correct answer)
• Document the discrepancy and continue

Correct answer: Notify the surgeon immediately so the body cavity can be searched

A sponge count discrepancy before closure requires immediate notification of the surgeon to search the cavity before it is closed to prevent a retained foreign body.

Question 174: The preferred peripheral venipuncture site for IV catheter placement in dogs is the:

• Cephalic vein (Correct answer)
• Jugular vein
• Lateral saphenous vein
• 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 175: Which of the following is a contraindication to the use of barium sulfate as a GI contrast agent?

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

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 176: Which of the following details is NOT necessary to be included on a prescription label?

• Age of the patient (Correct answer)
• Name of the prescriber
• Address of the dispensing pharmacy
• Date of the prescription

Correct answer: Age of the patient

Each prescription label must state the following: - The pharmacy's name and address. - The prescription's serial number - The prescription's date - The prescriber's name - The patient's name - The drug's name and dosage - Useful information - Cautionary remarks when necessary

Question 177: Which type of wound healing occurs when wound edges are directly apposed and the wound closes with minimal scar formation?

• Second intention
• Granulation closure
• First intention (primary closure) (Correct answer)
• Third intention

Correct answer: First intention (primary closure)

First intention (primary closure) healing occurs when wound edges are sutured together directly, resulting in rapid healing with minimal scarring.

Question 178: A quality control chart shows three consecutive values on the same side of the mean. This pattern is called a:

• Trend or shift warning (Correct answer)
• Coefficient of variation breach
• Random error
• Westgard 3s violation

Correct answer: Trend or shift warning

Three or more consecutive QC values on the same side of the mean suggest a systematic trend or shift in the assay, warranting investigation before patient results are reported.

Question 179: 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 provide structural support to the incision
• To allow passive drainage of fluid and exudate from a wound (Correct answer)

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

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

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 181: Which anticoagulant is found in a purple-top (lavender) tube and is used for complete blood counts?

• EDTA (Correct answer)
• Sodium fluoride
• Heparin
• Sodium citrate

Correct answer: EDTA

EDTA (ethylenediaminetetraacetic acid) chelates calcium and is the anticoagulant of choice for CBCs because it preserves cell morphology.

Question 182: A dog is prescribed metronidazole 15 mg/kg PO BID. The dog weighs 22 lbs. How many milligrams per dose should be administered?

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

Correct answer: 150 mg

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

Question 183: Which of the following best describes 'balanced anesthesia'?

• Maintaining equal inhalant concentration throughout the procedure
• Combining multiple drug classes to provide analgesia, sedation, and muscle relaxation while minimizing individual drug doses (Correct answer)
• Using equal doses of two inhalant agents simultaneously
• Using the same drug protocol regardless of patient species

Correct answer: Combining multiple drug classes to provide analgesia, sedation, and muscle relaxation while minimizing individual drug doses

Balanced anesthesia combines analgesics, sedatives, and muscle relaxants at lower individual doses to achieve better anesthesia with fewer side effects than relying on a single agent.

Question 184: In CT imaging, Hounsfield units (HU) are used to describe tissue density. Which value most closely corresponds to fluid (water)?

• -1000 HU
• +1000 HU
• 0 HU (Correct answer)
• +400 HU

Correct answer: 0 HU

Water is assigned a Hounsfield unit value of 0 by definition; air is -1000 HU and cortical bone is approximately +1000 HU, forming the anchors of the HU scale.

Question 185: When assessing periodontal disease staging in veterinary patients, which factor is most critical to evaluate?

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

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 186: Which of the following instruments is classified as a needle holder?

• Metzenbaum
• Allis
• Mayo-Hegar (Correct answer)
• Gelpi

Correct answer: Mayo-Hegar

The Mayo-Hegar needle holder is a standard needle driver used to grasp and pass suture needles through tissue during wound closure.

Question 187: Which route of administration provides the fastest onset of drug action?

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

Correct answer: Intravenous

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

Question 188: During a splenectomy, the scrub technician should be prepared to assist with ligation of which primary vessel?

• Renal artery
• Splenic artery and vein (Correct answer)
• Celiac trunk only
• 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 189: A dog has a suspected portosystemic shunt. Which imaging modality provides the MOST definitive pre-surgical mapping of shunt vasculature?

• CT angiography (Correct answer)
• Nuclear scintigraphy
• Survey abdominal radiography
• Abdominal ultrasound with Doppler

Correct answer: CT angiography

CT angiography provides three-dimensional vascular mapping with high spatial resolution, allowing precise identification of shunt location, number, and anatomy critical for surgical planning.

Question 190: A radiograph of a dog's abdomen reveals a 'string of pearls' gas pattern in the small intestine. This is most consistent with:

• Mechanical small intestinal obstruction (Correct answer)
• Colonic dilation due to megacolon
• Free abdominal air from perforation
• 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 191: A surgical patient develops a temperature of 40.5°C (104.9°F) 36 hours after surgery. Which post-operative complication should be considered FIRST?

• Hypothyroidism
• Malignant hyperthermia
• Surgical site infection (Correct answer)
• Anesthetic reaction

Correct answer: Surgical site infection

Fever developing 24–72 hours post-operatively is classically associated with surgical site infection or systemic infection.

Question 192: The Mach effect artifact on a radiograph appears as a dark line at the interface of two structures of different opacity. It is caused by:

• Film processing errors
• X-ray tube failure
• Scattered radiation
• Edge enhancement by the human visual system (Correct answer)

Correct answer: Edge enhancement by the human visual system

The Mach effect is a perceptual phenomenon where the human visual system exaggerates contrast at edges, creating an apparent dark band at density interfaces.

Question 193: Which of the following correctly describes the purpose of a surgical lavage during an abdominal procedure?

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

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

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

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 195: A technician notices that the CO2 absorbent granules in a circle system have turned permanently blue-purple throughout. What does this indicate?

• Normal color — the absorbent is fresh
• Halothane contamination
• Excessive moisture in the system
• The absorbent is exhausted and must be replaced (Correct answer)

Correct answer: The absorbent is exhausted and must be replaced

Most CO2 absorbents contain a pH indicator that permanently changes color (e.g., blue-purple for Baralyme, violet for Sodasorb) when exhausted and unable to absorb CO2.

Question 196: Which radiation safety measure is most effective at reducing occupational exposure for the veterinary technician?

• Maximizing distance from the primary beam and using remote positioning aids (Correct answer)
• Wearing a lead apron only
• Increasing kVp to shorten exposure time
• Holding the patient manually with double gloves

Correct answer: Maximizing distance from the primary beam and using remote positioning aids

Distance is the most effective protection because radiation intensity decreases with the square of the distance (inverse square law); combined with positioning aids, it minimizes occupational dose.

Question 197: Which drug class is commonly used to reverse the effects of benzodiazepine sedation in veterinary patients?

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

Correct answer: Benzodiazepine antagonists

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

Question 198: Which vaccine adjuvant is most commonly associated with injection-site sarcoma in cats?

• Carbopol polymer
• Modified live virus particles
• Aluminum salts (aluminum hydroxide/phosphate) (Correct answer)
• Oil-in-water emulsions

Correct answer: Aluminum salts (aluminum hydroxide/phosphate)

Aluminum-based adjuvants in killed vaccines are associated with feline injection-site sarcoma (FISS), prompting recommendations to use non-adjuvanted vaccines in cats when possible.

Question 199: A sample for blood glucose measurement is collected in a gray-top tube. What additive does it contain?

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

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 200: Which aminoglycoside is the most harmful to the kidneys?

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

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 201: Which anticoagulant is found in the purple-top (EDTA) tube and is the preferred choice for complete blood count (CBC) samples?

• Sodium citrate
• Heparin
• EDTA (ethylenediaminetetraacetic acid) (Correct answer)
• Sodium fluoride

Correct answer: EDTA (ethylenediaminetetraacetic acid)

EDTA chelates calcium and preserves cell morphology, making it the anticoagulant of choice for CBC analysis.

Question 202: A patient with congestive heart failure and pleural effusion is most appropriately positioned for nursing care in:

• Trendelenburg position to improve venous return
• Sternal recumbency to reduce respiratory effort (Correct answer)
• Dorsal recumbency to facilitate auscultation
• Left lateral recumbency to drain the thorax

Correct answer: Sternal recumbency to reduce respiratory effort

Sternal recumbency reduces compression of the lungs, minimizes respiratory effort, and is best tolerated by patients with pulmonary or pleural disease.