Certified Gastroenterology Registered Nurse (CGRN) — Questions and Answers

Question 1: A patient undergoing an upper endoscopy (EGD) begins to cough persistently and develops audible wheezing. The monitor shows a rapid drop in oxygen saturation. The nurse's immediate priority is to:

Administer a bronchodilator.
Apply suction to the patient's oropharynx. (Correct answer)
Prepare for endotracheal intubation.
Turn the patient to the right lateral decubitus position.

Correct answer: Apply suction to the patient's oropharynx.

The patient's symptoms are classic for aspiration of gastric contents or secretions. The first and most critical action according to airway management principles is to clear the airway of any fluid or particulate matter. Suctioning the oropharynx is the most direct intervention to prevent further material from entering the lower respiratory tract and to facilitate breathing. While other actions may be necessary, clearing the airway is the first priority.

Question 2: A patient's blood pressure falls to 78/44 after sedation is administered. After stopping further sedative doses, which intervention should the nurse anticipate first?

Immediate defibrillation
Placement of a chest tube
An IV fluid bolus (Correct answer)
An oral antihypertensive hold only

Correct answer: An IV fluid bolus

Sedation-induced hypotension is typically treated first with IV crystalloid boluses before vasopressors.

Question 3: Which finding indicates a patient has slipped from moderate into deep sedation?

Response only to repeated or painful stimulation (Correct answer)
Anxiety with intact protective reflexes
Purposeful response to name being called
Spontaneous eye opening with conversation

Correct answer: Response only to repeated or painful stimulation

Deep sedation is characterized by purposeful response only after repeated or painful stimulation.

Question 4: What distinguishes endoscopic submucosal dissection (ESD) from standard EMR?

ESD removes lesions piecemeal with a cold snare
ESD allows en bloc removal of larger lesions using an electrosurgical knife to dissect the submucosa (Correct answer)
ESD is limited to lesions under 5 mm
ESD uses no electrocautery at all

Correct answer: ESD allows en bloc removal of larger lesions using an electrosurgical knife to dissect the submucosa

ESD dissects beneath the lesion with specialized knives, enabling en bloc resection of large or early malignant lesions.

Question 5: What are the names of stomach mucosa openings?

Gastric glands
Gastric pits (Correct answer)
Opening
Pits

Correct answer: Gastric pits

The surface of the stomach mucosa is lined with millions of tiny indentations called gastric pits. These pits lead down into the gastric glands, which contain various cells that secrete gastric juice components like hydrochloric acid, pepsinogen, and mucus. These secretions are essential for chemical digestion in the stomach.

Question 6: If reprocessing documentation for a specific scope is incomplete, what is the appropriate action before patient use?

Use the scope and document later
Discard the scope permanently
Do not use the scope until reprocessing is verified or repeated (Correct answer)
Use it only for low-risk patients

Correct answer: Do not use the scope until reprocessing is verified or repeated

Without verified reprocessing, the scope must not be used until it is confirmed or reprocessed to ensure patient safety.

Question 7: What is the correct reprocessing sequence for a flexible endoscope after a procedure?

Manual cleaning only, then immediate reuse
High-level disinfection, then bedside pre-cleaning, then leak testing
Bedside pre-cleaning, leak testing, manual cleaning, high-level disinfection, drying and storage (Correct answer)
Sterilization in a steam autoclave

Correct answer: Bedside pre-cleaning, leak testing, manual cleaning, high-level disinfection, drying and storage

Reprocessing must follow the sequence of pre-cleaning, leak test, manual cleaning, high-level disinfection, then drying to prevent infection transmission.

Question 8: A restrictive transfusion threshold (hemoglobin <7 g/dL) is appropriate for most GI bleeding patients, but a HIGHER threshold is recommended for patients with:

Peptic ulcer disease without cardiac history
Diverticular bleeding with stable vital signs
Acute coronary syndrome or significant cardiac disease (Correct answer)
Variceal bleeding from compensated cirrhosis

Correct answer: Acute coronary syndrome or significant cardiac disease

Patients with acute coronary syndrome or significant cardiac disease require a higher transfusion threshold (Hgb <8 g/dL) to maintain adequate myocardial oxygen delivery.

Question 9: A patient with diverticulitis is admitted with fever and left lower quadrant pain. During the acute phase, which intervention is expected?

High-fiber diet with raw vegetables
Daily stimulant laxatives
Immediate colonoscopy to confirm diagnosis
Bowel rest with clear liquids or NPO and antibiotics (Correct answer)

Correct answer: Bowel rest with clear liquids or NPO and antibiotics

Acute diverticulitis is managed with bowel rest and antibiotics; colonoscopy is deferred to avoid perforation.

Question 10: A Sengstaken-Blakemore tube is used as a temporizing measure for:

Providing enteral nutrition during acute GI bleeding
Nasogastric lavage in peptic ulcer hemorrhage
Decompressing a large bowel obstruction
Balloon tamponade of actively bleeding esophageal or gastric varices (Correct answer)

Correct answer: Balloon tamponade of actively bleeding esophageal or gastric varices

The Sengstaken-Blakemore tube uses inflatable esophageal and gastric balloons to mechanically compress bleeding varices when endoscopic or pharmacologic therapy has failed.

Question 11: Which finding indicates a therapeutic response to lactulose in hepatic encephalopathy?

Resolution of jaundice
Increased urine output
Normalization of INR
Improved mental status and decreased serum ammonia (Correct answer)

Correct answer: Improved mental status and decreased serum ammonia

Effective lactulose therapy lowers ammonia levels, which correlates with improved level of consciousness.

Question 12: What is the correct sequence for removing contaminated personal protective equipment?

Gown, gloves, mask, goggles
Gloves, goggles/face shield, gown, mask (Correct answer)
Mask, gloves, goggles, gown
Goggles, mask, gloves, gown

Correct answer: Gloves, goggles/face shield, gown, mask

Removing gloves first (most contaminated), then eyewear, gown, and finally the mask minimizes self-contamination.

Question 13: When using a 0.55% ortho-phthalaldehyde (OPA) solution for manual high-level disinfection of a flexible endoscope, which parameters are most commonly cited in manufacturer and professional guidelines for efficacy in the United States?

A minimum soak time of 12 minutes at or above 20°C (68°F). (Correct answer)
A minimum soak time of 5 minutes at any room temperature.
A minimum soak time of 10 minutes, with the solution heated to 30°C (86°F).
A minimum soak time of 20 minutes at or above 25°C (77°F).

Correct answer: A minimum soak time of 12 minutes at or above 20°C (68°F).

The effectiveness of high-level disinfectants depends on strict adherence to validated parameters of time and temperature. For many OPA solutions used for manual reprocessing in the US, the standard is a minimum immersion time of 12 minutes at a temperature of at least 20°C (68°F). Shorter times, such as 5 minutes, are typically associated with higher temperatures (e.g., 25°C) and use within an automated endoscope reprocessor (AER).

Question 14: When educating a patient who has recovered from an NSAID-induced GI bleed, which discharge instruction is most important?

Resume NSAID use after 48 hours if no recurrent bleeding is noted
Discuss alternative analgesics and the need for a PPI if NSAIDs cannot be avoided (Correct answer)
Take NSAIDs with milk to reduce gastric irritation
Avoid all dietary fiber for 6 weeks following discharge

Correct answer: Discuss alternative analgesics and the need for a PPI if NSAIDs cannot be avoided

Preventing recurrence requires patient education about the ulcerogenic risk of NSAIDs, promotion of alternative analgesics, and co-prescription of a PPI if NSAIDs are medically necessary.

Question 15: A patient presents with hematemesis and coffee-ground emesis. These findings are most consistent with bleeding that originates:

In the terminal ileum
From internal hemorrhoids
In the sigmoid colon
Proximal to the ligament of Treitz (Correct answer)

Correct answer: Proximal to the ligament of Treitz

Hematemesis and coffee-ground emesis indicate upper GI bleeding originating proximal to the ligament of Treitz, where blood is partially digested before being expelled.

Question 16: According to the color-coded safety data, what does an SDS (Safety Data Sheet) provide for chemicals like glutaraldehyde?

Hazard information, exposure limits, and first-aid measures (Correct answer)
The expiration date only
The manufacturer's marketing slogan
The purchase price of the product

Correct answer: Hazard information, exposure limits, and first-aid measures

An SDS details hazards, safe handling, exposure limits, and emergency measures for hazardous chemicals.

Question 17: A nurse is providing dietary education to a patient newly diagnosed with celiac disease. Which meal selection by the patient demonstrates a correct understanding of the dietary restrictions?

A turkey sandwich on rye bread with a side of coleslaw.
A bowl of oatmeal with brown sugar and raisins.
Grilled chicken, baked potato, and a side salad with vinaigrette. (Correct answer)
Beer-battered fish with a side of seasoned fries.

Correct answer: Grilled chicken, baked potato, and a side salad with vinaigrette.

The correct meal is grilled chicken, a baked potato, and a salad with a simple vinaigrette, as these items are naturally free of gluten. Celiac disease requires a strict, lifelong avoidance of gluten, a protein found in wheat, barley, and rye. Rye bread and beer batter contain gluten. While oats are naturally gluten-free, they are often subject to cross-contamination with wheat during processing and should only be consumed if specifically labeled as gluten-free.

Question 18: Which stage of digestion is not existent?

Propulsion
Ingestion
Expulsion (Correct answer)
Absorption

Correct answer: Expulsion

The main stages of digestion include ingestion (taking in food), propulsion (moving food through the digestive tract), mechanical and chemical digestion (breaking down food), absorption (nutrients entering the bloodstream), and defecation (elimination of undigested waste). 'Expulsion' is not a recognized distinct stage in the physiological process of digestion, although defecation involves expelling waste.

Question 19: Which finding after esophageal dilation requires immediate notification of the provider?

Mild sore throat
Small amount of blood-streaked saliva
Hoarseness lasting one hour
Subcutaneous crepitus in the neck (Correct answer)

Correct answer: Subcutaneous crepitus in the neck

Subcutaneous crepitus suggests esophageal perforation with air tracking into tissues, a surgical emergency.

Question 20: A patient with inflammatory bowel disease starting infliximab requires which assessment before the first dose?

Pulmonary function testing with spirometry
Baseline audiometry testing
Screening for latent tuberculosis and hepatitis B (Correct answer)
A 24-hour urine collection for creatinine clearance

Correct answer: Screening for latent tuberculosis and hepatitis B

Anti-TNF agents can reactivate latent TB and hepatitis B, so screening is mandatory before initiation.

Question 21: When should a nurse perform hand hygiene relative to patient contact in the endoscopy unit?

Only after removing gloves
Only when hands look visibly soiled
Before and after patient contact, even when gloves are used (Correct answer)
Only at the start of the shift

Correct answer: Before and after patient contact, even when gloves are used

Hand hygiene is performed before and after contact because gloves are not a substitute for clean hands.

Question 22: Which finding in the recovery area after colonoscopy with polypectomy most warrants immediate provider notification?

One small smear of blood on the first stool
Mild cramping relieved by passing flatus
Abdominal distension with rigidity and severe pain (Correct answer)
Drowsiness 20 minutes after sedation

Correct answer: Abdominal distension with rigidity and severe pain

Rigidity, distension, and severe pain suggest perforation, a surgical emergency.

Question 23: Which patient statement indicates correct understanding of proton pump inhibitor (PPI) therapy for GERD?

"I take it with antacids for better absorption."
"I take it only when I feel heartburn."
"I take it at bedtime with a snack."
"I take it 30 to 60 minutes before my first meal of the day." (Correct answer)

Correct answer: "I take it 30 to 60 minutes before my first meal of the day."

PPIs work best when taken 30-60 minutes before a meal so peak drug levels coincide with active proton pumps.

Question 24: What does the Aldrete score assess during recovery?

Nutritional status
Bowel prep quality
Pain intensity only
Readiness for discharge from post-sedation recovery (Correct answer)

Correct answer: Readiness for discharge from post-sedation recovery

The Aldrete score evaluates recovery from sedation to guide discharge readiness.

Question 25: What is the FIRST step that must occur immediately after an endoscope is removed from the patient?

Alcohol flush and forced-air drying
Bedside precleaning to prevent biofilm and drying of secretions (Correct answer)
High-level disinfection
Sterilization in the reprocessing room

Correct answer: Bedside precleaning to prevent biofilm and drying of secretions

Bedside precleaning wipes the insertion tube and flushes channels to remove debris before it dries and forms biofilm.

Question 26: The gastroenterology nurse is performing a pre-procedure medication reconciliation for a patient scheduled for a colonoscopy with possible polypectomy. Which of the following patient-reported medications requires the MOST urgent clarification with the prescribing provider?

Clopidogrel 75 mg daily. (Correct answer)
Amlodipine 10 mg daily.
Metoprolol succinate 50 mg daily.
Levothyroxine 100 mcg daily.

Correct answer: Clopidogrel 75 mg daily.

Clopidogrel is a potent antiplatelet agent that significantly increases the risk of bleeding after a high-risk procedure like polypectomy. Management requires careful coordination between the endoscopist and the prescribing provider to balance the risk of bleeding against the risk of a thromboembolic event. The other medications (thyroid hormone, beta-blocker, calcium channel blocker) are typically continued and do not pose a direct, significant bleeding risk.

Question 27: How should sharps such as biopsy needles be disposed of after a GI procedure?

Rinsed and reused later in the day
Handed to another staff member to recap
Recapped and placed in the regular trash
Placed uncapped directly into a puncture-resistant sharps container (Correct answer)

Correct answer: Placed uncapped directly into a puncture-resistant sharps container

Sharps must go directly into a designated puncture-resistant container without recapping to prevent injury.

Question 28: Which medication reverses the effects of benzodiazepine sedation?

Atropine
Naloxone
Flumazenil (Correct answer)
Protamine

Correct answer: Flumazenil

Flumazenil is the antagonist used to reverse benzodiazepines like midazolam.

Question 29: A nurse is preparing for a colonoscopy on a patient with a confirmed Clostridioides difficile (C. diff) infection. In addition to standard and contact precautions, which infection control measure is most critical for the staff and environment?

Using an alcohol-based hand rub for all hand hygiene.
Wearing an N95 respirator during the procedure.
Ensuring the procedure room has negative air pressure.
Performing hand hygiene with soap and water and cleaning the room with a sporicidal disinfectant. (Correct answer)

Correct answer: Performing hand hygiene with soap and water and cleaning the room with a sporicidal disinfectant.

C. difficile forms spores that are resistant to alcohol-based hand sanitizers and many common disinfectants. Therefore, the most critical measures are to perform vigorous hand hygiene with soap and water to physically remove spores and to clean all environmental surfaces with an EPA-registered, sporicidal agent capable of killing C. difficile spores.

Question 30: Which type of fiber is most effective for managing diarrhea in GI patients?

Soluble fiber (Correct answer)
Bran
Cellulose
Insoluble fiber

Correct answer: Soluble fiber

Soluble fiber forms a gel in the GI tract that slows transit time and absorbs excess water, helping to manage diarrhea.

Question 31: A patient with newly diagnosed celiac disease asks which food is safe to eat. Which choice is appropriate?

Barley soup
Whole wheat toast
Plain rice with grilled chicken (Correct answer)
Rye crackers

Correct answer: Plain rice with grilled chicken

Rice and unprocessed meats are naturally gluten-free, while wheat, barley, and rye contain gluten.

Question 32: Which of the following is the most common cause of upper GI bleeding in adults?

Esophageal varices
Gastric cancer
Peptic ulcer disease (Correct answer)
Mallory-Weiss tear

Correct answer: Peptic ulcer disease

Peptic ulcer disease accounts for approximately 50% of all upper GI bleeding cases, making it the leading cause.

Question 33: Which finding indicates the bowel preparation is adequate before colonoscopy begins?

The patient completed only half the prep but feels empty
Stool is brown and formed
Rectal effluent is clear or light yellow liquid without solid stool (Correct answer)
The patient has had no bowel movement since starting the prep

Correct answer: Rectal effluent is clear or light yellow liquid without solid stool

Clear liquid effluent indicates the colon is sufficiently cleansed for mucosal visualization.

Question 34: Which finding in a patient with cirrhosis most urgently suggests spontaneous bacterial peritonitis?

Platelet count of 140,000/mm³
Ascitic fluid neutrophil count of 400 cells/mm³ (Correct answer)
Serum sodium of 136 mEq/L
Mild pedal edema

Correct answer: Ascitic fluid neutrophil count of 400 cells/mm³

An ascitic fluid absolute neutrophil count of 250 cells/mm³ or greater is diagnostic of spontaneous bacterial peritonitis.

Question 35: A patient scheduled for colonoscopy is prescribed polyethylene glycol solution; which finding warrants holding the prep and calling the provider?

Chills after drinking cold solution
Clear yellow liquid stools
Severe abdominal distention and inability to pass flatus (Correct answer)
Mild nausea after the first liter

Correct answer: Severe abdominal distention and inability to pass flatus

Distention with obstipation suggests bowel obstruction, a contraindication to osmotic bowel preparation.

Question 36: Diverticulitis is inflammation of outpouchings most commonly located in which structure?

Sigmoid colon (Correct answer)
Duodenum
Terminal ileum
Stomach

Correct answer: Sigmoid colon

Diverticula and diverticulitis occur most often in the sigmoid colon.

Question 37: Which patient is at highest risk for post-polypectomy electrocoagulation syndrome during hot snare polypectomy?

A patient with a large sessile polyp removed from the thin-walled right colon (Correct answer)
A patient with a small pedunculated polyp in the sigmoid
A patient with a hyperplastic rectal polyp
A patient undergoing cold snare removal of a 4 mm polyp

Correct answer: A patient with a large sessile polyp removed from the thin-walled right colon

Large sessile lesions in the thin-walled cecum and ascending colon carry the greatest transmural burn risk.

Question 38: A patient with known diverticulosis presents with sudden, painless, large-volume bright red rectal bleeding. This presentation is most consistent with:

Ischemic colitis
Colorectal adenocarcinoma
Diverticular bleeding (Correct answer)
Infectious colitis from Clostridioides difficile

Correct answer: Diverticular bleeding

Diverticular bleeding classically presents as sudden, painless, high-volume hematochezia and is the most common cause of significant lower GI bleeding in adults.

Question 39: Cholecystokinin (CCK) stimulates which response after a fatty meal?

Gastric acid secretion only
Closure of the sphincter of Oddi
Gallbladder contraction and pancreatic enzyme release (Correct answer)
Colonic water absorption

Correct answer: Gallbladder contraction and pancreatic enzyme release

CCK triggers gallbladder contraction and pancreatic enzyme secretion while relaxing the sphincter of Oddi.

Question 40: What is the primary purpose of a low-residue diet for a patient preparing for a colonoscopy?

Reduce fat absorption
Minimize stool production for better visualization (Correct answer)
Reduce abdominal pain
Prevent dehydration

Correct answer: Minimize stool production for better visualization

A low-residue diet before colonoscopy decreases stool bulk and residue in the colon, facilitating better visualization during the procedure.

Question 41: Which post-procedure symptom after colonoscopy warrants immediate physician notification?

Passing gas
Severe abdominal pain and rigidity (Correct answer)
Slight drowsiness
Mild bloating

Correct answer: Severe abdominal pain and rigidity

Severe pain with rigidity may indicate perforation and needs urgent attention.

Question 42: A patient with liver cirrhosis presents with acute variceal hemorrhage. Which vasoactive medication is most commonly administered as a continuous infusion to reduce portal pressure?

Neostigmine
Pantoprazole
Octreotide (Correct answer)
Metoclopramide

Correct answer: Octreotide

Octreotide, a somatostatin analogue, reduces splanchnic blood flow and portal pressure and is the first-line vasoactive agent for acute variceal bleeding.

Question 43: A patient with hemochromatosis-related liver disease will most likely be managed with which therapy?

Scheduled therapeutic phlebotomy (Correct answer)
Blood transfusions every month
Weekly iron infusions
High-dose vitamin C supplementation

Correct answer: Scheduled therapeutic phlebotomy

Phlebotomy removes excess iron and is the mainstay of hemochromatosis management.

Question 44: The nurse is verifying pre-procedure requirements. Which element belongs in the time-out immediately before endoscopy begins?

Insurance authorization number
Completion of the discharge summary
Confirmation of patient identity, procedure, and site (Correct answer)
Selection of the patient's diet for next week

Correct answer: Confirmation of patient identity, procedure, and site

The universal protocol time-out verifies correct patient, correct procedure, and correct site before starting.

Question 45: A patient with short bowel syndrome is at greatest risk for deficiency of which vitamin?

Vitamin K
Vitamin B12 (Correct answer)
Vitamin A
Vitamin C

Correct answer: Vitamin B12

Vitamin B12 is absorbed in the terminal ileum, which is often resected in short bowel syndrome, leading to deficiency.

Question 46: What digestive enzymes are present in the mouth?

None of the above
Pepsin
Lipids
Amylase (Correct answer)

Correct answer: Amylase

Saliva, produced in the mouth, contains the enzyme salivary amylase (also known as ptyalin). This enzyme begins the chemical digestion of carbohydrates by breaking down complex starches into simpler sugars. This initial breakdown prepares food for further digestion in the stomach and small intestine.

Question 47: A sterile package is found to be wet upon removal from storage. What should the nurse do?

Store it for later use once dry
Use it immediately before it dries
Consider it contaminated and do not use it (Correct answer)
Dry it with a towel and use it

Correct answer: Consider it contaminated and do not use it

Moisture creates a wicking path for microorganisms, so a wet package is considered contaminated.

Question 48: A patient on the endoscopy schedule for variceal band ligation suddenly vomits bright red blood in pre-op. What is the nurse's priority action?

Complete the routine admission checklist
Offer sips of ice water
Position the patient to protect the airway and notify the team immediately (Correct answer)
Administer the scheduled oral simethicone

Correct answer: Position the patient to protect the airway and notify the team immediately

Active variceal hemorrhage threatens the airway from aspiration, making airway protection and rapid escalation the priority.

Question 49: A patient reports dysphagia to solids that has progressed to liquids over 3 months, with a 15-pound weight loss. The nurse recognizes this pattern is most concerning for which condition?

Globus sensation
Esophageal malignancy (Correct answer)
Oral thrush
Simple heartburn

Correct answer: Esophageal malignancy

Progressive solids-to-liquids dysphagia with weight loss is an alarm pattern suggesting an obstructing esophageal tumor.

Question 50: A patient scheduled for capsule endoscopy asks when the capsule will be retrieved. What is the nurse's best response?

It must be returned to the lab for data download
The capsule is disposable and passes naturally in the stool (Correct answer)
It dissolves in the stomach
It is retrieved endoscopically after 8 hours

Correct answer: The capsule is disposable and passes naturally in the stool

The video capsule transmits images to an external recorder and is excreted naturally; it is not retrieved or reused.

Question 51: A metoclopramide-using patient has been given a haloperidol prescription. Which of the following conditions does this medication combination put the patient at higher risk for?

Tardive dyskinesia (Correct answer)
Tachycardia
GI bleeding
Excessive sedation

Correct answer: Tardive dyskinesia

Both metoclopramide and haloperidol are dopamine receptor antagonists, and their concurrent use significantly increases the risk of extrapyramidal symptoms, particularly tardive dyskinesia. Tardive dyskinesia is a movement disorder characterized by involuntary, repetitive body movements. Nurses must be aware of this drug interaction and monitor patients closely for any signs of abnormal movements.

Question 52: Which dietary modification is the primary recommendation for patients with symptomatic diverticulosis?

Low-sodium diet
High-fiber diet (Correct answer)
Low-fiber diet
Liquid diet

Correct answer: High-fiber diet

A high-fiber diet increases stool bulk and reduces colonic pressure, helping prevent diverticular inflammation and symptom progression.

Question 53: Why does the duodenoscope elevator mechanism pose a special reprocessing challenge?

Its complex moving parts can harbor debris and resist thorough cleaning (Correct answer)
It cannot be immersed in water
It is made of disposable plastic
It does not contact patient tissue

Correct answer: Its complex moving parts can harbor debris and resist thorough cleaning

The intricate elevator mechanism has crevices that trap organic material and are difficult to clean and disinfect fully.

Question 54: A patient receiving a PEG tube feeding suddenly develops coughing, dyspnea, and crackles. What is the nurse's priority action?

Reposition the patient flat
Stop the feeding and assess for aspiration (Correct answer)
Flush the tube with water
Increase the feeding rate to finish quickly

Correct answer: Stop the feeding and assess for aspiration

Coughing and crackles during enteral feeding suggest aspiration, so feeding must stop immediately while the patient is assessed.

Question 55: A patient scheduled for a capsule endoscopy asks about the main contraindication to the test. Which condition should the nurse identify?

History of GERD
Known bowel stricture or obstruction (Correct answer)
Prior cholecystectomy
Lactose intolerance

Correct answer: Known bowel stricture or obstruction

A stricture or obstruction can trap the capsule and cause retention, making it the primary contraindication.

Question 56: A nurse is providing discharge instructions to a patient who underwent a colonoscopy with polypectomy. Which symptoms should the nurse instruct the patient to report immediately as potential signs of a post-procedure infection or perforation?

Mild cramping that is relieved by passing gas.
Severe abdominal pain, fever, and chills. (Correct answer)
Significant abdominal bloating and gas for up to 24 hours.
A small amount of blood on the toilet tissue after the first bowel movement.

Correct answer: Severe abdominal pain, fever, and chills.

While bloating, gas, and minor spotting of blood can be expected after a colonoscopy with polypectomy, the combination of severe, worsening abdominal pain, fever, and chills are hallmark signs of a serious complication, such as a perforation or post-polypectomy syndrome, which can lead to infection and peritonitis. These symptoms warrant immediate medical evaluation.

Question 57: Ascites in liver failure develops primarily due to:

Increased gastric acid
Portal hypertension and low albumin (Correct answer)
Excess bile production
Colonic obstruction

Correct answer: Portal hypertension and low albumin

Portal hypertension plus reduced oncotic pressure from low albumin causes fluid to accumulate in the peritoneum.

Question 58: Midway through a colonoscopy, the patient begins moving and reports pain despite moderate sedation. What is the most appropriate nursing response?

Pause the procedure, assess the patient, and titrate analgesia per orders before continuing (Correct answer)
Physically restrain the patient so the scope can advance
Immediately administer flumazenil
Tell the patient the discomfort is normal and continue

Correct answer: Pause the procedure, assess the patient, and titrate analgesia per orders before continuing

Pain and movement require pausing to assess and titrate medication rather than forcing the procedure onward.

Question 59: Following successful endoscopic hemostasis of a bleeding peptic ulcer, the recommended proton pump inhibitor regimen is:

Oral PPI once daily for 2 weeks
High-dose IV PPI bolus (80 mg) followed by continuous infusion (8 mg/hr) for 72 hours (Correct answer)
IV PPI once every 24 hours for 48 hours
Oral PPI twice daily for 7 days only

Correct answer: High-dose IV PPI bolus (80 mg) followed by continuous infusion (8 mg/hr) for 72 hours

High-dose IV PPI bolus plus 72-hour infusion maintains gastric pH >6, which stabilizes clot formation and significantly reduces rebleeding risk.

Question 60: A patient develops hives, wheezing, and hypotension minutes after receiving pre-procedure IV antibiotics. What is the nurse's priority action?

Give an oral antihistamine and proceed
Document and reassess in 30 minutes
Stop the infusion and initiate anaphylaxis management per protocol (Correct answer)
Continue the infusion at a slower rate

Correct answer: Stop the infusion and initiate anaphylaxis management per protocol

Hives, wheezing, and hypotension indicate anaphylaxis requiring immediate infusion stoppage and emergency treatment.

Question 61: What does a chemical indicator (e.g., autoclave tape) confirm about a sterilized item?

That the item is safe to reuse indefinitely
That the item was cleaned before packaging
That the package was exposed to the sterilization process parameters (Correct answer)
That the item is guaranteed sterile

Correct answer: That the package was exposed to the sterilization process parameters

A chemical indicator shows exposure to sterilization conditions but does not by itself guarantee sterility.

Question 62: Misoprostol is contraindicated in which patient population?

Pregnant women (Correct answer)
Patients with GERD
Patients over age 65
Patients with diabetes

Correct answer: Pregnant women

Misoprostol is a prostaglandin analog that stimulates uterine contractions and can cause abortion or preterm labor.

Question 63: After consuming vegetables contaminated with E. coli (0157:H7), a 76-year-old woman experienced stomach cramps and non-bloody diarrhea for 48 hours, followed by 4 days of bloody diarrhea. Which of the following conditions is the PATIENT'S HIGHEST RISK for developing?

Small bowel obstruction
Intestinal perforation
Hemolytic uremic syndrome (Correct answer)
Intestinal necrosis

Correct answer: Hemolytic uremic syndrome

E. coli O157:H7 infection, especially in vulnerable populations like the elderly, is strongly associated with the development of Hemolytic Uremic Syndrome (HUS). HUS is a severe complication characterized by hemolytic anemia, thrombocytopenia, and acute kidney injury, caused by toxins produced by the bacteria. The progression from non-bloody to bloody diarrhea is a classic presentation preceding HUS.

Question 64: A patient scheduled for a colonoscopy at 8 AM asks when to finish the second dose of split-dose bowel prep. The best answer is:

Take the entire prep two days early to be safe
Finish it immediately before leaving home
Skip the second dose if stools are already brown
Complete it 4 to 6 hours before the procedure, per facility protocol (Correct answer)

Correct answer: Complete it 4 to 6 hours before the procedure, per facility protocol

Split-dose prep finished 4-6 hours pre-procedure optimizes cleansing quality while meeting sedation fasting requirements.

Question 65: Which finding most reliably indicates hemodynamic instability in a patient with suspected GI bleeding?

Oxygen saturation of 96% on room air
Orthostatic hypotension with a systolic drop greater than 20 mmHg upon standing (Correct answer)
Heart rate of 82 bpm with blood pressure 130/80 mmHg
Respiratory rate of 18 breaths per minute

Correct answer: Orthostatic hypotension with a systolic drop greater than 20 mmHg upon standing

Orthostatic hypotension indicates significant intravascular volume depletion (typically >15% blood volume loss) and is a critical sign of hemodynamic instability.

Question 66: A nurse is caring for a patient admitted with acute pancreatitis. The patient complains of severe, boring epigastric pain that radiates to the back. Which pathophysiological process is the primary cause of this intense pain?

Reflux of gastric acid into the pancreatic duct
Inflammation and swelling of the hepatic capsule
Autodigestion of pancreatic tissue by activated enzymes (Correct answer)
Obstruction of the common bile duct by a gallstone

Correct answer: Autodigestion of pancreatic tissue by activated enzymes

Acute pancreatitis is characterized by the premature activation of pancreatic enzymes, such as trypsinogen to trypsin, within the pancreas itself. These activated enzymes begin to digest the pancreatic tissue and surrounding fats (autodigestion), leading to inflammation, edema, hemorrhage, and intense pain.

Question 67: A patient is being prepared for flexible sigmoidoscopy without sedation. Which teaching point is accurate?

You must be NPO for 24 hours beforehand
A driver is always required by law
You may feel pressure and cramping as air is introduced (Correct answer)
You will be unconscious throughout

Correct answer: You may feel pressure and cramping as air is introduced

Unsedated sigmoidoscopy commonly causes pressure and cramping from insufflation, which patients should expect.

Question 68: When assessing a patient's readiness to learn ostomy self-care, which factor is most important to evaluate first?

The patient's emotional acceptance of the stoma (Correct answer)
The patient's previous surgical history
The patient's insurance coverage for supplies
The family's availability to assist at home

Correct answer: The patient's emotional acceptance of the stoma

Learning cannot proceed effectively until the patient begins to emotionally accept the body image change.

Question 69: Which type of feeding is preferred in a critically ill patient with a functioning GI tract?

Total parenteral nutrition (TPN)
Enteral nutrition (Correct answer)
Peripheral parenteral nutrition (PPN)
Oral clear liquids only

Correct answer: Enteral nutrition

Enteral nutrition is preferred in critically ill patients with a functional GI tract because it preserves gut integrity and reduces infection risk compared to parenteral nutrition.

Question 70: A GI nurse observes that a patient's nasogastric aspirate has changed from bloody to bilious/clear. This most appropriately indicates:

The upper GI bleeding source may have temporarily slowed or stopped, requiring continued close monitoring (Correct answer)
A new lower GI bleed has developed
The NG tube has migrated into the duodenum
The bleeding has definitively ceased and the NG tube should be removed immediately

Correct answer: The upper GI bleeding source may have temporarily slowed or stopped, requiring continued close monitoring

Clearing of NG aspirate is reassuring but does not confirm permanent hemostasis; rebleeding remains possible and ongoing monitoring is essential.

Question 71: Which of the following is a primary indication for emergency surgical intervention in a patient with upper GI bleeding?

Failed endoscopic hemostasis with persistent hemorrhage and hemodynamic instability (Correct answer)
A BUN-to-creatinine ratio of 25:1 on initial labs
Coffee-ground emesis with no active bleeding found on endoscopy
A single episode of hematemesis with stable vital signs

Correct answer: Failed endoscopic hemostasis with persistent hemorrhage and hemodynamic instability

Emergency surgery is indicated when endoscopic hemostasis has failed to control ongoing hemorrhage in a hemodynamically unstable patient who cannot be stabilized with resuscitation.

Question 72: To maintain CGRN certification, a nurse must recertify every:

5 years (Correct answer)
2 years
10 years
3 years

Correct answer: 5 years

CGRN certification is valid for 5 years, after which the nurse must recertify through continuing education or re-examination to maintain the credential.

Question 73: What is the single most effective measure to prevent transmission of infection in the endoscopy suite?

Wearing double gloves at all times
Proper hand hygiene (Correct answer)
Frequent room fumigation
Routine antibiotic prophylaxis

Correct answer: Proper hand hygiene

Hand hygiene is consistently the most effective, evidence-based way to reduce healthcare-associated infection transmission.

Question 74: A patient with Crohn's disease is experiencing an acute flare. Which nutritional intervention is most appropriate?

High-fiber oral diet
High-fat diet
Increased dairy intake
Enteral nutrition via nasogastric tube (Correct answer)

Correct answer: Enteral nutrition via nasogastric tube

Enteral nutrition provides bowel rest while delivering adequate nutrients and has been shown to reduce inflammation in Crohn's disease flares.

Question 75: Which laboratory value is the best indicator of a patient's long-term nutritional status?

Serum prealbumin
Blood glucose
Serum albumin (Correct answer)
Total lymphocyte count

Correct answer: Serum albumin

Serum albumin reflects nutritional status over the past 2–3 months due to its long half-life of approximately 20 days, making it the best marker of long-term nutritional status.

Question 76: Which IV access is most appropriate for the initial resuscitation of a patient with active GI bleeding?

Single central venous catheter only
Two large-bore (16-gauge or larger) peripheral IVs (Correct answer)
Single 22-gauge peripheral IV
PICC line for rapid fluid administration

Correct answer: Two large-bore (16-gauge or larger) peripheral IVs

Two large-bore peripheral IVs allow the fastest rates of fluid and blood product administration needed for hemodynamic resuscitation in active GI bleeding.

Question 77: A gastric ulcer typically causes pain that:

Improves with eating
Is relieved by lying flat
Worsens with eating (Correct answer)
Occurs only at night

Correct answer: Worsens with eating

Gastric ulcer pain classically worsens with food, unlike duodenal ulcers which often improve.

Question 78: A GI nurse sustains a needlestick injury from a used needle. What is the immediate first action?

Squeeze the site vigorously and apply a tourniquet
Ignore it if the patient appears healthy
Apply bleach to the wound
Wash the wound with soap and running water, then report and seek evaluation (Correct answer)

Correct answer: Wash the wound with soap and running water, then report and seek evaluation

The wound should be washed with soap and water immediately, followed by prompt reporting for post-exposure evaluation.

Question 79: During EGD, a sedated patient begins vomiting. What is the nurse's immediate priority?

Administer ondansetron and continue the procedure
Give flumazenil to wake the patient
Place the patient supine and elevate the legs
Position the patient laterally and suction the airway (Correct answer)

Correct answer: Position the patient laterally and suction the airway

Lateral positioning and suction protect the airway from aspiration, the most immediate life threat.

Question 80: A patient beginning pancreatic enzyme replacement therapy (PERT) needs which key teaching point?

Stop the enzymes once stools become normal
Chew the capsules thoroughly before swallowing
Take the enzymes with every meal and snack (Correct answer)
Take the enzymes once daily at bedtime on an empty stomach

Correct answer: Take the enzymes with every meal and snack

PERT must accompany all food intake so the enzymes can aid digestion; capsules should be swallowed whole, not chewed.

Question 81: Which instruction is essential for a patient starting azathioprine for Crohn's disease?

Expect results within 48 hours of the first dose
Report fever or sore throat immediately due to bone marrow suppression risk (Correct answer)
Double the dose if a flare occurs
Take the medication only during disease flares

Correct answer: Report fever or sore throat immediately due to bone marrow suppression risk

Azathioprine can cause leukopenia, so signs of infection must be reported promptly.

Question 82: The sphincter of Oddi controls the flow of what into the duodenum?

Chyme from the stomach
Gastric acid only
Bile and pancreatic secretions (Correct answer)
Ileal contents

Correct answer: Bile and pancreatic secretions

The sphincter of Oddi regulates bile and pancreatic juice entering the duodenum at the ampulla of Vater.

Question 83: A patient scheduled for colonoscopy reports taking clopidogrel daily after cardiac stent placement 2 months ago. What is the gastroenterology nurse's best action?

Instruct the patient to stop clopidogrel immediately for 7 days
Cancel the procedure permanently
Notify the provider so the cardiology and GI teams can weigh bleeding vs. thrombosis risk (Correct answer)
Proceed with the procedure since clopidogrel does not affect bleeding

Correct answer: Notify the provider so the cardiology and GI teams can weigh bleeding vs. thrombosis risk

Antiplatelet management after recent stenting requires coordinated provider decision-making because stopping clopidogrel risks stent thrombosis.

Question 84: Ten individuals were affected by a 2-week-long epidemic of Clostridium difficile infections in the gastroenterology unit. Which of the following should staff members focus their efforts on in order to stop the spread of the infection?

Limiting patient contacts
Testing patient stool specimen
Contact precautions/hand hygiene (Correct answer)
Antibiotic stewardship

Correct answer: Contact precautions/hand hygiene

Clostridium difficile (C. diff) is highly contagious and spread through the fecal-oral route, often via contaminated surfaces and healthcare workers' hands. Implementing strict contact precautions, including gown and glove use, and meticulous hand hygiene with soap and water are the most critical interventions to prevent its spread in a healthcare setting. These measures directly interrupt the transmission chain during an outbreak.

Question 85: Portal hypertension in cirrhosis most commonly leads to which serious complication?

Esophageal varices (Correct answer)
Appendicitis
Gastric ulcer
Hiatal hernia

Correct answer: Esophageal varices

Increased portal pressure diverts blood into collateral vessels, producing esophageal varices prone to bleeding.

Question 86: A biofilm on an endoscope channel is best described as what?

A harmless soap residue
A layer of disinfectant
A protective layer of microorganisms adhered to the surface, resistant to disinfection (Correct answer)
The manufacturer's lubricant coating

Correct answer: A protective layer of microorganisms adhered to the surface, resistant to disinfection

Biofilm is a community of microbes embedded in a protective matrix that shields them from disinfectants.

Question 87: A patient presents with steatorrhea (fatty stools), weight loss, and vitamin deficiencies. An intestinal biopsy reveals blunting of the villi in the duodenum. This finding is most characteristic of which GI disorder?

Diverticulitis
Celiac disease (Correct answer)
Crohn's disease
Ulcerative colitis

Correct answer: Celiac disease

Celiac disease is an autoimmune disorder triggered by the ingestion of gluten in genetically susceptible individuals. The inflammatory response to gluten primarily affects the small intestine, leading to damage and atrophy (blunting) of the villi. This significantly reduces the surface area available for nutrient absorption, resulting in malabsorption of fats, vitamins, and other nutrients.

Question 88: Which patient is the most appropriate candidate for discharge from the endoscopy recovery unit?

Oxygen saturation 88% on room air but alert
Vomiting repeatedly but has a driver waiting
Aldrete score of 5 but insists on leaving
Aldrete score of 9, tolerating fluids, accompanied by a responsible adult (Correct answer)

Correct answer: Aldrete score of 9, tolerating fluids, accompanied by a responsible adult

A high recovery score, tolerated intake, and a responsible escort meet standard discharge criteria after sedation.

Question 89: A patient with chronic pancreatitis reports bulky, foul-smelling stools. Which intervention addresses this problem?

Pancreatic enzyme replacement with meals (Correct answer)
Loperamide before each meal
Increasing dietary fat to 50% of calories
Daily magnesium citrate

Correct answer: Pancreatic enzyme replacement with meals

Steatorrhea from exocrine insufficiency is treated with pancreatic enzyme replacement taken with food.

Question 90: Which organism is a leading cause of peptic ulcer disease?

Clostridioides difficile
Helicobacter pylori (Correct answer)
Escherichia coli
Salmonella

Correct answer: Helicobacter pylori

H. pylori infection is a major cause of peptic ulcers.

Question 91: Which position is standard for initiating a colonoscopy?

Prone position
Left lateral (Sims') position (Correct answer)
Supine with legs elevated
Right lateral position

Correct answer: Left lateral (Sims') position

Colonoscopy is typically started with the patient in the left lateral position to facilitate scope insertion and advancement.

Question 92: Which laboratory value most directly reflects the synthetic function of the liver?

AST
Amylase
Alkaline phosphatase
Serum albumin (Correct answer)

Correct answer: Serum albumin

Albumin is synthesized by the liver, so low levels reflect impaired hepatic synthetic capacity.

Question 93: Which diet is most appropriate for a patient with newly diagnosed Celiac disease?

High-fiber diet
Gluten-free diet (Correct answer)
Low-residue diet
Low-fat diet

Correct answer: Gluten-free diet

Celiac disease requires a strict lifelong gluten-free diet to prevent intestinal damage caused by immune reaction to gluten.

Question 94: A patient receiving total parenteral nutrition (TPN) develops elevated liver enzymes. The nurse should recognize this as a sign of which complication?

TPN-associated liver disease (Correct answer)
Hypoglycemia
Line sepsis
Fluid overload

Correct answer: TPN-associated liver disease

TPN-associated liver disease (TPNALD) is a well-recognized complication of long-term TPN, characterized by hepatic steatosis and cholestasis.

Question 95: After ERCP, a patient reports severe epigastric pain radiating to the back with nausea. The nurse should suspect which complication?

Esophageal stricture
Post-ERCP pancreatitis (Correct answer)
Normal post-procedure gas pain
Dumping syndrome

Correct answer: Post-ERCP pancreatitis

Epigastric pain radiating to the back with nausea after ERCP is the classic presentation of post-ERCP pancreatitis.

Question 96: Which assessment finding indicates a patient receiving enteral tube feeding is at risk for aspiration?

Elevated head of bed at 30 degrees
Absent bowel sounds with distension (Correct answer)
Gastric residual of 100 mL
Blood glucose of 110 mg/dL

Correct answer: Absent bowel sounds with distension

Absent bowel sounds with abdominal distension suggest delayed gastric emptying, which significantly increases the risk of aspiration during tube feeding.

Question 97: After esophageal dilation, which symptom should the patient be taught to report immediately?

Mild sore throat for a day
Temporary hoarseness
Feeling tired the evening of the procedure
Chest pain with fever or difficulty breathing (Correct answer)

Correct answer: Chest pain with fever or difficulty breathing

Chest pain with fever or dyspnea after dilation suggests esophageal perforation with possible mediastinitis.

Question 98: During an initial assessment of a patient with cirrhosis, which of the following signs and symptoms would be most indicative of hepatic encephalopathy?

Jaundice and pruritus.
Palmar erythema and spider angiomas.
Asterixis and confusion. (Correct answer)
Ascites and peripheral edema.

Correct answer: Asterixis and confusion.

Hepatic encephalopathy is a decline in brain function that occurs as a result of severe liver disease. The classic signs are changes in mental status, such as confusion, and the presence of asterixis (a flapping tremor of the hands). The other options are signs of cirrhosis but are not specific to encephalopathy.

Question 99: A patient with acute pancreatitis classically presents with pain that:

Is worse in the right shoulder
Radiates to the back (Correct answer)
Improves with fatty meals
Only occurs after fasting

Correct answer: Radiates to the back

Acute pancreatitis causes epigastric pain that radiates to the back.

Question 100: A patient on room air under moderate sedation shows an ETCO2 waveform that flattens on capnography before any change in SpO2. What should the nurse do first?

Increase IV fluid rate
Administer flumazenil immediately
Stimulate the patient and assess airway patency (Correct answer)
Wait for the pulse oximeter to confirm desaturation

Correct answer: Stimulate the patient and assess airway patency

Loss of ETCO2 waveform indicates apnea or obstruction and warrants immediate stimulation and airway assessment, since capnography detects hypoventilation before SpO2 falls.

Question 101: Which condition involves transmural inflammation with skip lesions anywhere from mouth to anus?

Ulcerative colitis
Crohn's disease (Correct answer)
Celiac disease
Diverticulitis

Correct answer: Crohn's disease

Crohn's disease causes patchy, full-thickness (transmural) inflammation with skip lesions.

Question 102: A patient with inflammatory bowel disease (IBD) is most likely to require supplementation with which mineral due to chronic diarrhea?

Selenium
Calcium
Iron (Correct answer)
Zinc

Correct answer: Iron

Chronic GI blood loss from IBD combined with poor absorption leads to iron deficiency anemia, making iron the most commonly deficient mineral in these patients.

Question 103: How is the effectiveness of a steam sterilizer definitively verified?

With a biological indicator containing bacterial spores (Correct answer)
By visual inspection of the load
By counting the number of instruments
By checking the room temperature

Correct answer: With a biological indicator containing bacterial spores

Biological indicators use resistant spores to confirm the sterilizer actually killed microorganisms.

Question 104: During a procedure, blood-tinged fluid is continuously suctioned from the stomach and the patient's heart rate climbs from 72 to 118. Which additional finding would most support developing hypovolemia?

Flushed warm skin
Bounding peripheral pulses
Bradypnea
Narrowing pulse pressure with falling blood pressure (Correct answer)

Correct answer: Narrowing pulse pressure with falling blood pressure

Tachycardia with narrowed pulse pressure and hypotension reflects progressive volume loss from bleeding.

Question 105: Why is a leak test performed during endoscope reprocessing?

To detect damage to the scope's exterior or internal channels before immersion (Correct answer)
To verify the disinfectant concentration
To measure water temperature in the channels
To confirm the drying cabinet is functioning

Correct answer: To detect damage to the scope's exterior or internal channels before immersion

Leak testing identifies breaches in the scope so a damaged instrument is not immersed and further contaminated or damaged.

Question 106: A patient scheduled for an EGD with moderate sedation reports eating a full breakfast 2 hours ago. What should the nurse do?

Notify the provider because the procedure may need to be delayed (Correct answer)
Give metoclopramide and proceed immediately
Have the patient induce vomiting before the procedure
Proceed since EGD does not require fasting

Correct answer: Notify the provider because the procedure may need to be delayed

Solid food within 6 hours increases aspiration risk, so the provider must be notified to consider delaying the elective procedure.

Question 107: Which portion of the small intestine absorbs vitamin B12 and bile salts?

Jejunum
Terminal ileum (Correct answer)
Pylorus
Duodenum

Correct answer: Terminal ileum

The terminal ileum is the site of B12 and bile salt reabsorption.

Question 108: The hormone cholecystokinin (CCK) plays a crucial role in digestion. Which of the following is a primary action of CCK?

Inhibiting all pancreatic secretions
Stimulating gallbladder contraction and pancreatic enzyme release (Correct answer)
Increasing the rate of gastric emptying
Stimulating gastric acid secretion

Correct answer: Stimulating gallbladder contraction and pancreatic enzyme release

Cholecystokinin (CCK) is secreted by enteroendocrine cells in the duodenum in response to the presence of fats and proteins. Its main functions are to stimulate the contraction of the gallbladder to release bile and to stimulate the pancreas to secrete digestive enzymes, both of which are essential for the digestion of fats and proteins.

Question 109: A patient on long-term omeprazole therapy should be monitored for deficiency of which nutrient?

Folic acid
Vitamin B12 (Correct answer)
Vitamin C
Vitamin K

Correct answer: Vitamin B12

Chronic acid suppression from PPIs impairs vitamin B12 absorption, which requires gastric acid to release B12 from food proteins.

Question 110: Angiographic embolization is most commonly used in GI bleeding management when:

The bleeding source is clearly identified and treated during colonoscopy
Endoscopic hemostasis has failed and the patient is not a surgical candidate (Correct answer)
Variceal bleeding has been controlled with band ligation
The patient has a severe coagulation disorder limiting procedural options

Correct answer: Endoscopic hemostasis has failed and the patient is not a surgical candidate

Angiographic embolization is an interventional radiology option used as a bridge or alternative when endoscopic hemostasis fails and surgery carries prohibitive operative risk.

Question 111: A patient is being discharged after variceal band ligation. Which instruction is most important?

Resume aspirin the next morning
Avoid all fluids for 48 hours
Eat a high-fiber, rough-textured diet today
Report black tarry stools or vomiting blood immediately (Correct answer)

Correct answer: Report black tarry stools or vomiting blood immediately

Melena or hematemesis after banding signals rebleeding, which is life-threatening and needs emergency care.

Question 112: Celiac disease causes malabsorption due to damage of what structure?

Gastric parietal cells
Esophageal mucosa
Small intestinal villi (Correct answer)
Colonic crypts

Correct answer: Small intestinal villi

Gluten triggers an immune response that flattens small intestinal villi, impairing absorption.

Question 113: A patient with C. difficile infection is most appropriately treated first-line with which oral agent?

Amoxicillin
Vancomycin (Correct answer)
Ciprofloxacin
Azithromycin

Correct answer: Vancomycin

Oral vancomycin (or fidaxomicin) is first-line for C. difficile because it achieves high colonic concentrations without systemic absorption.

Question 114: Which pre-procedure finding requires the nurse to notify the provider before an elective EGD with sedation?

The patient has been NPO for 9 hours
The patient signed the consent form
The patient ate a full breakfast 2 hours ago (Correct answer)
The patient removed dentures as instructed

Correct answer: The patient ate a full breakfast 2 hours ago

Recent solid food intake violates fasting requirements and creates aspiration risk under sedation.

Question 115: For endoscopic hemostasis of an actively bleeding peptic ulcer, which approach is considered most effective by current guidelines?

Argon plasma coagulation as the sole treatment
Thermal therapy alone with a heater probe
Combination of injection therapy plus a second modality such as thermal or mechanical clips (Correct answer)
Epinephrine injection therapy alone

Correct answer: Combination of injection therapy plus a second modality such as thermal or mechanical clips

Combining epinephrine injection with a second hemostatic modality (thermal or mechanical) achieves superior hemostasis and lower rebleeding rates than either method alone.

Question 116: According to Spaulding classification, how are flexible GI endoscopes categorized because they contact intact mucous membranes?

Critical items requiring sterilization
Environmental items requiring cleaning only
Semi-critical items requiring high-level disinfection (Correct answer)
Noncritical items requiring low-level disinfection

Correct answer: Semi-critical items requiring high-level disinfection

Endoscopes touch mucous membranes but not sterile tissue, making them semi-critical items that require at least high-level disinfection.

Question 117: Barrett's esophagus is characterized by which cellular change?

Hyperkeratosis
Fatty infiltration
Columnar to squamous change
Squamous to columnar metaplasia (Correct answer)

Correct answer: Squamous to columnar metaplasia

Chronic reflux causes normal squamous epithelium to become columnar (intestinal) metaplasia, raising cancer risk.

Question 118: Which communication tool is most effective for transferring patient care responsibility during a shift handoff in the GI unit?

Written note in the chart
Verbal report only
Incident report form
SBAR (Situation, Background, Assessment, Recommendation) (Correct answer)

Correct answer: SBAR (Situation, Background, Assessment, Recommendation)

SBAR provides a structured, standardized framework for communication during care transitions, reducing the risk of miscommunication and handoff errors.

Question 119: Manual cleaning of an endoscope must be completed within what timeframe to be most effective?

Whenever the reprocessing room is free
Within the manufacturer-specified time, generally as soon as possible after use (Correct answer)
Only after 24 hours of soaking
Exactly one week after the procedure

Correct answer: Within the manufacturer-specified time, generally as soon as possible after use

Prompt cleaning per the manufacturer's instructions prevents debris from drying and biofilm from forming.

Question 120: Ulcerative colitis inflammation is characteristically:

Continuous and limited to the mucosa of the colon (Correct answer)
Confined to the small bowel
Located mainly in the stomach
Transmural with skip lesions

Correct answer: Continuous and limited to the mucosa of the colon

UC produces continuous mucosal inflammation beginning in the rectum and extending proximally in the colon.

Question 121: A patient with type 2 diabetes, managed with daily long-acting insulin and metformin, is scheduled for an 8:00 AM colonoscopy. Which instruction regarding their diabetes medications is most appropriate for the morning of the procedure?

Take both your metformin and long-acting insulin as usual with a small sip of water.
Take your metformin as prescribed but hold all insulin doses for the day.
Hold both medications completely without consulting the provider since you are NPO.
Hold the metformin and consult the prescribing provider for instructions on adjusting the long-acting insulin dose. (Correct answer)

Correct answer: Hold the metformin and consult the prescribing provider for instructions on adjusting the long-acting insulin dose.

Metformin is typically held for 24-48 hours before a procedure involving potential renal stress or contrast media due to the risk of lactic acidosis. Long-acting insulin doses often need to be reduced (e.g., by 30-50%) to prevent hypoglycemia while the patient is NPO, but this adjustment requires a specific provider order. Therefore, the safest action is to hold the metformin and obtain clear instructions for the insulin dose.

Question 122: What surveillance practice helps detect endoscope reprocessing failures early?

Weighing the scopes
Counting the number of procedures performed
Periodic microbiological culturing of endoscope channels (Correct answer)
Random patient interviews

Correct answer: Periodic microbiological culturing of endoscope channels

Routine culturing of scope channels can detect persistent contamination and reprocessing breakdowns before patient harm.

Question 123: During ERCP, the patient becomes hypoxic and the nurse notes crepitus over the neck and chest. What complication does this finding suggest?

Perforation with subcutaneous emphysema (Correct answer)
Laryngospasm
Aspiration pneumonia
Pulmonary embolism

Correct answer: Perforation with subcutaneous emphysema

Crepitus indicates air tracking into subcutaneous tissue from a perforation, often duodenal or esophageal.

Question 124: Which nutritional supplement is recommended for patients with hepatic encephalopathy to help manage ammonia levels?

Iron supplements
Medium-chain triglycerides
High-protein shakes
Branched-chain amino acids (BCAAs) (Correct answer)

Correct answer: Branched-chain amino acids (BCAAs)

BCAAs are metabolized in muscle rather than the liver, helping to reduce ammonia production and improve hepatic encephalopathy.

Question 125: A patient is admitted with Clostridioides difficile. Which hand hygiene method is required after care?

Alcohol-based hand rub only
Soap and water washing (Correct answer)
Waterless foam sanitizer
No hand hygiene if gloves were worn

Correct answer: Soap and water washing

C. difficile spores are not killed by alcohol, so mechanical removal with soap and water is required.

Question 126: A patient taking sucralfate should be instructed to take the medication at what time?

Only at bedtime with a snack
With meals
Immediately after meals
On an empty stomach, 1 hour before meals (Correct answer)

Correct answer: On an empty stomach, 1 hour before meals

Sucralfate requires an acidic empty stomach to form its protective barrier over ulcerated mucosa.

Question 127: Which sphincter must relax to allow gastric contents to pass into the duodenum?

Ileocecal valve
Pyloric sphincter (Correct answer)
Sphincter of Oddi
Lower esophageal sphincter

Correct answer: Pyloric sphincter

The pyloric sphincter regulates emptying of gastric chyme into the duodenum.

Question 128: What discharge instruction is essential for a patient who received moderate sedation?

Take a double dose of home sedatives to aid sleep
Resume all normal activities immediately
Do not drive, operate machinery, or make legal decisions for 24 hours (Correct answer)
Avoid all oral fluids for 12 hours

Correct answer: Do not drive, operate machinery, or make legal decisions for 24 hours

Residual sedative effects impair judgment and coordination for up to 24 hours after moderate sedation.

Question 129: Which patient position is recommended for a patient actively vomiting blood to minimize the risk of aspiration?

Left lateral decubitus (left-side down) (Correct answer)
High Fowler's at 90 degrees
Supine with legs elevated 30 degrees
Prone position

Correct answer: Left lateral decubitus (left-side down)

The left lateral decubitus position reduces aspiration risk by pooling blood in the dependent stomach and keeping it away from the airway.

Question 130: The Glasgow-Blatchford score is used in the management of upper GI bleeding to:

Grade the severity of portal hypertension
Identify low-risk patients who may be safely managed as outpatients (Correct answer)
Predict mortality from lower GI hemorrhage
Assess sedation depth during emergency endoscopy

Correct answer: Identify low-risk patients who may be safely managed as outpatients

The Glasgow-Blatchford score identifies patients with upper GI bleeding at sufficiently low risk to avoid hospital admission and urgent endoscopy.

Question 131: A sedated patient develops laryngospasm during endoscopy. Which early intervention should the nurse anticipate?

Trendelenburg positioning only
Immediate cricothyrotomy
Oral fluids to soothe the larynx
Positive pressure ventilation with 100% oxygen and jaw thrust (Correct answer)

Correct answer: Positive pressure ventilation with 100% oxygen and jaw thrust

Gentle positive pressure with 100% oxygen and airway repositioning often breaks laryngospasm before paralytics are needed.

Question 132: A patient with short bowel syndrome after extensive ileal resection is at greatest risk for which deficiency?

Hypernatremia
Iron overload
Vitamin B12 deficiency (Correct answer)
Vitamin C deficiency

Correct answer: Vitamin B12 deficiency

Vitamin B12 is absorbed in the terminal ileum, so ileal resection causes B12 deficiency.

Question 133: How should reprocessed endoscopes be stored to maintain their clean status?

Hung vertically in a ventilated cabinet with caps and valves removed (Correct answer)
Coiled tightly in the transport case
Immersed in disinfectant solution
Lying flat on a countertop covered with a towel

Correct answer: Hung vertically in a ventilated cabinet with caps and valves removed

Vertical hanging in a ventilated cabinet allows drainage and drying, reducing contamination risk.

Question 134: Which vital sign change during sedation most urgently signals respiratory depression?

Falling oxygen saturation (Correct answer)
Increased temperature
Rising blood pressure
Bradycardia only

Correct answer: Falling oxygen saturation

A drop in SpO2 is the key early indicator of respiratory depression under sedation.

Question 135: During leak testing, bubbles emerge continuously from the distal bending section of an endoscope. What should the technician do?

Seal the leak with waterproof tape
Run it through the automated reprocessor twice
Proceed with manual cleaning as usual
Remove the scope from service and send it for repair (Correct answer)

Correct answer: Remove the scope from service and send it for repair

A failed leak test indicates a breach that allows fluid invasion and infection risk, so the scope must be removed from service.

Question 136: Which endoscopic finding on a peptic ulcer (Forrest classification) carries the highest risk of rebleeding and mandates immediate hemostasis?

Clean-based ulcer with no stigmata
Flat pigmented spot within the ulcer base
Adherent clot overlying the ulcer without a visible vessel
Actively spurting arterial hemorrhage (Correct answer)

Correct answer: Actively spurting arterial hemorrhage

Actively spurting arterial hemorrhage (Forrest class Ia) carries the highest rebleeding risk (>80% without treatment) and requires immediate endoscopic intervention.

Question 137: When assessing bowel sounds in a patient with a suspected early mechanical small bowel obstruction, the nurse would expect to hear:

Normal soft gurgles every 5 to 15 seconds
Completely absent sounds in all quadrants immediately
High-pitched, tinkling sounds above the obstruction (Correct answer)
A continuous venous hum over the epigastrium

Correct answer: High-pitched, tinkling sounds above the obstruction

Early mechanical obstruction produces high-pitched, tinkling, hyperactive sounds proximal to the blockage.

Question 138: A patient becomes paradoxically agitated and combative after receiving midazolam. What should the nurse suspect?

Malignant hyperthermia
A paradoxical reaction to the benzodiazepine (Correct answer)
Normal expected response to sedation
Anaphylaxis to the drug

Correct answer: A paradoxical reaction to the benzodiazepine

Benzodiazepines occasionally cause paradoxical agitation, especially in children and the elderly.

Question 139: During moderate sedation for endoscopy, a patient's oxygen saturation drops to 86% and respirations are shallow. What should the nurse do first?

Stimulate the patient and perform a chin lift or jaw thrust to open the airway (Correct answer)
Increase the propofol infusion
Document and continue monitoring
Administer flumazenil immediately

Correct answer: Stimulate the patient and perform a chin lift or jaw thrust to open the airway

Airway repositioning and stimulation are the first interventions for sedation-related hypoventilation before reversal agents are considered.

Question 140: During the reprocessing of a flexible colonoscope, which of the following steps is MOST critical to perform immediately after pre-cleaning and before manual submersion cleaning?

Manually brushing the biopsy channel.
Soaking the scope in a high-level disinfectant.
Drying all channels with compressed air.
Performing a pressure leak test. (Correct answer)

Correct answer: Performing a pressure leak test.

Performing a pressure leak test is a critical safety step that must be done after pre-cleaning but before the endoscope is submerged for manual cleaning. [13] This test pressurizes the internal channels to detect any breaks or holes in the scope's sheath. [13] If a leak is present, submerging the scope would allow fluid to invade the internal components, leading to catastrophic and expensive damage. [13]

Question 141: Which type of precaution is appropriate for a patient with active pulmonary tuberculosis undergoing endoscopy?

Droplet precautions only
Standard precautions only
Contact precautions only
Airborne precautions with an N95 respirator and negative-pressure room (Correct answer)

Correct answer: Airborne precautions with an N95 respirator and negative-pressure room

Pulmonary TB requires airborne precautions including a fit-tested N95 respirator and a negative-pressure environment.

Question 142: Which statement about colorectal cancer screening for average-risk adults in the United States is correct?

Screening is only needed if symptoms develop
Colonoscopy must be repeated every year if normal
Screening should begin at age 45 (Correct answer)
Screening stops being recommended at age 50

Correct answer: Screening should begin at age 45

U.S. guidelines recommend beginning average-risk colorectal cancer screening at age 45.

Question 143: An endoscope is tested with an adenosine triphosphate (ATP) bioluminescence assay after manual cleaning but before high-level disinfection. The result is a 'FAIL,' indicating a high level of residual organic material. What is the priority action for the reprocessing technician?

Rinse the endoscope with sterile water and re-test immediately.
Document the failed result and send the endoscope for ethylene oxide (EtO) sterilization.
Reclean the endoscope manually and repeat the ATP test to verify cleanliness before proceeding. (Correct answer)
Proceed directly to high-level disinfection, as this step will eliminate any remaining bioburden.

Correct answer: Reclean the endoscope manually and repeat the ATP test to verify cleanliness before proceeding.

ATP testing is a quality control measure to verify the effectiveness of the manual cleaning step. A failed result indicates that the manual cleaning was inadequate and that organic debris, which can shield microorganisms from disinfectants, remains. The required action is to repeat the most critical step—manual cleaning—and then re-verify its effectiveness before the endoscope can proceed to high-level disinfection.

Question 144: Which lab elevation is most specific for acute pancreatitis?

Serum lipase (Correct answer)
Alkaline phosphatase
Blood urea nitrogen
Serum albumin

Correct answer: Serum lipase

Serum lipase is the most specific marker for acute pancreatitis.

Question 145: A patient with gastroesophageal reflux disease (GERD) is advised to avoid certain foods and lifestyle habits. The underlying pathophysiology of GERD involves the dysfunction of which anatomical structure?

Diaphragmatic cruise
Upper esophageal sphincter
Lower esophageal sphincter (LES) (Correct answer)
Pyloric sphincter

Correct answer: Lower esophageal sphincter (LES)

GERD is primarily caused by the inappropriate or transient relaxation of the lower esophageal sphincter (LES). The LES is a ring of muscle at the junction of the esophagus and stomach that normally prevents the backflow of acidic stomach contents into the esophagus. When the LES is weak or relaxes improperly, reflux occurs, leading to symptoms like heartburn and potential esophageal mucosal injury.

Question 146: The primary function of the large intestine is:

Enzyme secretion
Protein digestion
Water and electrolyte reabsorption (Correct answer)
Bile production

Correct answer: Water and electrolyte reabsorption

The colon reabsorbs water and electrolytes and forms stool.

Question 147: Which patient statement indicates correct understanding of split-dose bowel prep for colonoscopy?

"I'll drink the second half of the prep four to six hours before my procedure." (Correct answer)
"I should eat a full breakfast after the second dose."
"I'll finish all the prep the night before so I can sleep in."
"I can skip the second dose if my stools look clear."

Correct answer: "I'll drink the second half of the prep four to six hours before my procedure."

Split-dose prep with the second dose taken 4-6 hours before the procedure produces superior colon cleansing.

Question 148: A patient with esophageal varices is prescribed octreotide. What is the primary purpose of this medication?

Stimulate esophageal peristalsis
Increase gastric acid secretion
Prevent Clostridioides difficile infection
Reduce portal venous pressure (Correct answer)

Correct answer: Reduce portal venous pressure

Octreotide causes splanchnic vasoconstriction, lowering portal pressure and reducing variceal bleeding.

Question 149: A patient with a permanent pacemaker is scheduled for snare polypectomy. Which electrosurgical precaution is most appropriate?

Use only cold biopsy forceps for all polyps regardless of size
Cancel the procedure permanently
Place the grounding pad over the pacemaker
Use bipolar cautery or short bursts of monopolar current with cardiology consultation (Correct answer)

Correct answer: Use bipolar cautery or short bursts of monopolar current with cardiology consultation

Bipolar current or brief monopolar bursts with device interrogation planning minimizes electromagnetic interference with pacemakers.

Question 150: During a focused GI history, a patient reports unintentional weight loss of 12 pounds in two months, progressive dysphagia to solids, and fatigue. The nurse recognizes these as:

Alarm symptoms requiring prompt diagnostic evaluation (Correct answer)
Normal age-related changes in swallowing
Typical manifestations of irritable bowel syndrome
Expected findings of uncomplicated GERD

Correct answer: Alarm symptoms requiring prompt diagnostic evaluation

Weight loss with progressive dysphagia is a red-flag combination that warrants urgent endoscopic evaluation for malignancy.

Question 151: During a colonoscopy with moderate sedation, a patient's oxygen saturation drops from 98% to 88%. What is the nurse's FIRST action?

Stimulate the patient and open the airway with a chin lift or jaw thrust (Correct answer)
Administer flumazenil immediately
Increase the IV fluid rate
Document the reading and continue monitoring

Correct answer: Stimulate the patient and open the airway with a chin lift or jaw thrust

Airway repositioning and stimulation are the first-line interventions for sedation-related desaturation before reversal agents are considered.

Question 152: Which patient with chronic constipation warrants urgent diagnostic evaluation rather than routine laxative therapy?

A 30-year-old with constipation during a sedentary work week
A 25-year-old with constipation after starting iron supplements
A 58-year-old with new constipation, weight loss, and blood in the stool (Correct answer)
A 40-year-old with constipation while taking opioids post-surgery

Correct answer: A 58-year-old with new constipation, weight loss, and blood in the stool

New-onset constipation with weight loss and rectal bleeding after age 50 are alarm features for colorectal cancer.

Question 153: What is the primary purpose of an Automated Endoscope Reprocessor (AER)?

To provide standardized, reproducible high-level disinfection after manual cleaning (Correct answer)
To dry the scope only
To store scopes long-term
To replace the need for any manual cleaning

Correct answer: To provide standardized, reproducible high-level disinfection after manual cleaning

An AER standardizes high-level disinfection but does not eliminate the required manual precleaning step.

Question 154: Which finding in a patient with acute pancreatitis indicates possible retroperitoneal hemorrhage?

Rovsing sign
Murphy sign
McBurney point tenderness
Grey Turner sign (flank ecchymosis) (Correct answer)

Correct answer: Grey Turner sign (flank ecchymosis)

Grey Turner sign, bruising of the flanks, suggests retroperitoneal bleeding in severe hemorrhagic pancreatitis.

Question 155: Standard Precautions in the GI lab are based on which principle?

They apply only during colonoscopies
They apply only to patients with known infections
Only airborne organisms require precautions
All blood and body fluids are treated as potentially infectious (Correct answer)

Correct answer: All blood and body fluids are treated as potentially infectious

Standard Precautions assume every patient's blood and body fluids may carry infectious agents regardless of diagnosis.

Question 156: A patient with active GI bleeding is anticoagulated with warfarin and has an INR of 4.8. The most appropriate reversal strategy is:

Andexanet alfa IV
Vitamin K plus fresh frozen plasma or 4-factor prothrombin complex concentrate (PCC) (Correct answer)
Protamine sulfate IV
Idarucizumab IV

Correct answer: Vitamin K plus fresh frozen plasma or 4-factor prothrombin complex concentrate (PCC)

Warfarin is reversed with vitamin K (for sustained effect) combined with FFP or 4-factor PCC (for immediate factor replacement) in the setting of life-threatening bleeding.

Question 157: A patient with pancreatitis who is transitioning from NPO status should begin with which diet?

Full liquid diet with milkshakes
Low-fat, low-fiber soft diet (Correct answer)
High-protein diet
High-fat soft diet

Correct answer: Low-fat, low-fiber soft diet

A low-fat, low-fiber soft diet minimizes pancreatic enzyme stimulation while providing adequate nutrition during pancreatitis recovery.

Question 158: Which waste is classified as regulated medical (biohazardous) waste in the endoscopy unit?

Disposable gowns with no visible soil
Empty paper packaging
Blood-saturated dressings and used sharps (Correct answer)
Clean unused gauze

Correct answer: Blood-saturated dressings and used sharps

Items saturated with blood or body fluids and used sharps are regulated medical waste requiring special disposal.

Question 159: What function does the small intestine have?

Absorb food
Absorb nutrients (Correct answer)
Produce Chyme
Absorb water

Correct answer: Absorb nutrients

The small intestine is the primary site for the chemical digestion and absorption of nutrients from digested food. Its long, convoluted structure and specialized lining with villi and microvilli maximize the surface area for efficient absorption of carbohydrates, proteins, fats, vitamins, and minerals into the bloodstream. Water absorption primarily occurs in the large intestine.

Question 160: A Dieulafoy lesion is best characterized as:

A linear mucosal tear at the gastroesophageal junction
A perforated gastric ulcer with active arterial hemorrhage
An ectatic submucosal artery that erodes through the overlying mucosa without an ulcer (Correct answer)
Multiple small angiodysplasias scattered throughout the colon

Correct answer: An ectatic submucosal artery that erodes through the overlying mucosa without an ulcer

A Dieulafoy lesion is an abnormally large caliber submucosal artery that erodes through the mucosa, causing massive bleeding from a small, subtle defect.

Question 161: A patient with liver cirrhosis and ascites should be placed on which dietary restriction?

Low-potassium diet
High-protein diet
Low-carbohydrate diet
Low-sodium diet (Correct answer)

Correct answer: Low-sodium diet

Sodium restriction (typically 2,000 mg/day) reduces fluid retention and helps manage ascites in patients with liver cirrhosis.

Question 162: GERD results primarily from dysfunction of which structure?

Ileocecal valve
Lower esophageal sphincter (Correct answer)
Pyloric sphincter
Sphincter of Oddi

Correct answer: Lower esophageal sphincter

An incompetent lower esophageal sphincter allows acid reflux into the esophagus.

Question 163: A patient scheduled for colonoscopy reports taking a GLP-1 receptor agonist weekly. Why is this significant for pre-procedure planning?

Delayed gastric emptying may increase aspiration risk under sedation (Correct answer)
It causes false-positive biopsy results
It reverses the effect of sedatives
It intensifies bowel prep effects

Correct answer: Delayed gastric emptying may increase aspiration risk under sedation

GLP-1 agonists slow gastric emptying, so retained gastric contents can raise aspiration risk and may require medication holds or extended fasting.

Question 164: A patient with a new ileostomy has an output of 1,800 mL of liquid stool in 24 hours. What is the nurse's primary concern?

Stoma prolapse
Peristomal hernia
Fluid and electrolyte depletion (Correct answer)
Constipation

Correct answer: Fluid and electrolyte depletion

High-output ileostomies rapidly cause dehydration and losses of sodium and potassium.

Question 165: Which laboratory finding is most indicative of significant upper GI bleeding?

INR of 1.2
Platelet count of 200,000/μL
BUN-to-creatinine ratio greater than 20:1 (Correct answer)
Hemoglobin of 11 g/dL

Correct answer: BUN-to-creatinine ratio greater than 20:1

A BUN:creatinine ratio >20:1 indicates digested blood being absorbed from the GI tract, which significantly raises blood urea nitrogen levels.

Question 166: During a liver biopsy recovery, the nurse positions the patient on the right side. What is the rationale?

To improve venous return to the heart
To relieve referred shoulder pain
To prevent aspiration of secretions
To apply pressure to the biopsy site and reduce bleeding risk (Correct answer)

Correct answer: To apply pressure to the biopsy site and reduce bleeding risk

Right side-lying compresses the liver against the chest wall, tamponading the puncture site.

Question 167: A patient with ulcerative colitis is started on infliximab. Which pre-treatment screening is essential?

24-hour urine collection
Tuberculosis screening (Correct answer)
Pulmonary function testing
Colonoscopy repeat within 24 hours

Correct answer: Tuberculosis screening

Anti-TNF agents like infliximab can reactivate latent tuberculosis, so TB screening is required before starting therapy.

Question 168: The pancreatic enzyme responsible for carbohydrate digestion is:

Lipase
Chymotrypsin
Amylase (Correct answer)
Trypsin

Correct answer: Amylase

Pancreatic amylase breaks down carbohydrates in the small intestine.

Question 169: During a pediatric-sized balloon dilation of a stricture, the nurse's role includes monitoring balloon inflation pressure. Why is exceeding the recommended pressure dangerous?

It causes the balloon to migrate into the airway
It interferes with ECG monitoring
It increases the risk of mucosal tearing and perforation at the stricture (Correct answer)
It reduces the effectiveness of dilation

Correct answer: It increases the risk of mucosal tearing and perforation at the stricture

Overinflation beyond rated pressure can tear the mucosa or perforate the wall at the stricture site.

Question 170: During colonoscopy with CO2 insufflation unavailable, prolonged room-air insufflation increases the risk of which intra-procedure problem?

Painful luminal distension and vasovagal events from slowly absorbed gas (Correct answer)
Hypercapnia from rapid CO2 absorption
Methane combustion during cautery in a prepped colon
Immediate tension pneumothorax

Correct answer: Painful luminal distension and vasovagal events from slowly absorbed gas

Room air absorbs far more slowly than CO2, causing painful distension that can provoke vagal reactions.

Question 171: Which agent is commonly used as a high-level disinfectant for flexible endoscopes?

Quaternary ammonium compound
Chlorhexidine gluconate
Ortho-phthalaldehyde (OPA) (Correct answer)
70% isopropyl alcohol

Correct answer: Ortho-phthalaldehyde (OPA)

Ortho-phthalaldehyde is a widely used high-level disinfectant effective for GI endoscopes.

Question 172: Which statement about omega-3 fatty acid supplementation is most accurate for patients with inflammatory bowel disease?

It is contraindicated in IBD
It worsens GI inflammation
It may have anti-inflammatory benefits and help reduce disease activity (Correct answer)
It increases risk of GI bleeding

Correct answer: It may have anti-inflammatory benefits and help reduce disease activity

Omega-3 fatty acids have anti-inflammatory properties that may help reduce cytokine production and disease activity in IBD patients.

Question 173: What engineering control minimizes staff exposure to glutaraldehyde vapor during manual reprocessing?

Using covered soaking basins and adequate room ventilation with fume containment (Correct answer)
Increasing the room temperature
Opening all windows in the summer
Wearing only a surgical mask

Correct answer: Using covered soaking basins and adequate room ventilation with fume containment

Closed containers and proper ventilation reduce airborne vapor concentration below hazardous exposure limits.

Question 174: The Rockall score is primarily used to:

Determine the need for bowel preparation before colonoscopy
Predict rebleeding risk and mortality in upper GI bleeding (Correct answer)
Classify the degree of esophageal varices
Grade the severity of inflammatory bowel disease

Correct answer: Predict rebleeding risk and mortality in upper GI bleeding

The Rockall score stratifies risk and predicts rebleeding and mortality in patients with upper GI bleeding, guiding triage decisions.

Question 175: Which electrolyte imbalance is most commonly associated with prolonged diarrhea in GI patients?

Hypercalcemia
Hyperkalemia
Hypokalemia (Correct answer)
Hypernatremia

Correct answer: Hypokalemia

Prolonged diarrhea causes significant potassium loss through the GI tract, leading to hypokalemia.

Question 176: After high-level disinfection, why are endoscope channels flushed with alcohol and dried with forced air?

To lubricate the channels for the next use
To sterilize the outer sheath
To restore disinfectant potency
To remove residual water that promotes microbial growth during storage (Correct answer)

Correct answer: To remove residual water that promotes microbial growth during storage

Alcohol and forced-air drying eliminate moisture that would otherwise allow waterborne organisms to multiply.

Question 177: A patient with gastroparesis should be advised to eat meals that are:

Small, frequent, and low in fat and fiber (Correct answer)
Large and high in fat
High in fiber to promote motility
Two large meals per day

Correct answer: Small, frequent, and low in fat and fiber

Small, frequent meals that are low in fat and fiber reduce gastric emptying time and minimize symptoms of gastroparesis.

Certified Gastroenterology Registered Nurse (CGRN)

The CGRN certification, administered by ABCGN, validates specialized nursing knowledge in gastroenterology and endoscopy, covering GI procedures, patient care interventions, infection control, and general nursing care across the GI/endoscopy care continuum.

175

Questions

240 min

Time Limit

70%

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