Certified Gastroenterology Registered Nurse (CGRN) — Questions and Answers

Question 1: A patient with obstructive sleep apnea is scheduled for moderate sedation during colonoscopy. Which precaution is most appropriate?

Cancel the procedure since sedation is contraindicated
Double the initial midazolam dose to ensure adequate sedation
Skip supplemental oxygen to preserve hypoxic drive
Have airway equipment ready and titrate sedatives cautiously with capnography (Correct answer)

Correct answer: Have airway equipment ready and titrate sedatives cautiously with capnography

OSA patients are prone to airway obstruction, so cautious titration, capnography, and ready airway equipment are the standard precautions.

Question 2: Which type of precaution is appropriate for a patient with active pulmonary tuberculosis undergoing endoscopy?

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

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

Avoid all dietary fiber for 6 weeks following discharge
Take NSAIDs with milk to reduce gastric irritation
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)

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 4: During assessment, the nurse notes a positive Murphy's sign. This finding is most associated with which condition?

Splenic rupture
Acute appendicitis
Acute cholecystitis (Correct answer)
Diverticulitis

Correct answer: Acute cholecystitis

Murphy's sign, inspiratory arrest during palpation of the right upper quadrant, indicates gallbladder inflammation.

Question 5: A nurse is administering lactulose to a patient with hepatic encephalopathy. What is the primary therapeutic goal of this medication in this specific condition?

To treat chronic constipation
To restore normal gut flora
To reduce serum ammonia levels (Correct answer)
To prevent gastrointestinal bleeding

Correct answer: To reduce serum ammonia levels

In patients with hepatic encephalopathy, the liver is unable to metabolize ammonia, leading to toxic buildup in the blood. Lactulose, an osmotic laxative, works by acidifying the colon, which traps ammonia (as ammonium ions) in the stool and promotes its excretion through defecation, thereby lowering serum ammonia levels and improving mental status.

Question 6: A patient with chronic hepatitis B on entecavir must be counseled about which risk if the drug is abruptly discontinued?

Adrenal crisis
Severe hepatitis flare (Correct answer)
Rebound hypertension
Serotonin syndrome

Correct answer: Severe hepatitis flare

Stopping nucleoside analogs can trigger severe acute exacerbation of hepatitis B, so patients need close monitoring after discontinuation.

Question 7: 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)
Supine with legs elevated 30 degrees
High Fowler's at 90 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 8: Which assessment finding indicates a patient receiving enteral tube feeding is at risk for aspiration?

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

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 9: 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)
The NG tube has migrated into the duodenum
The bleeding has definitively ceased and the NG tube should be removed immediately
A new lower GI bleed has developed

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 10: Which organ has both endocrine and exocrine digestive functions?

Spleen
Pancreas (Correct answer)
Liver
Gallbladder

Correct answer: Pancreas

The pancreas secretes digestive enzymes (exocrine) and hormones like insulin (endocrine).

Question 11: What is the primary purpose of a low-residue diet for a patient preparing for a colonoscopy?

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

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 12: A patient with chronic hepatitis C asks about alcohol use. What is the most accurate teaching?

"Alcohol only matters after cirrhosis develops."
"Only liquor is harmful; beer and wine are fine."
"Alcohol should be avoided because it accelerates liver fibrosis." (Correct answer)
"Moderate drinking is safe with hepatitis C."

Correct answer: "Alcohol should be avoided because it accelerates liver fibrosis."

Alcohol synergistically accelerates fibrosis progression in chronic hepatitis C and should be avoided entirely.

Question 13: A patient scheduled for colonoscopy at 10 AM asks when to take the second half of a split-dose bowel prep. What should the nurse advise?

Complete it 4-6 hours before the procedure (Correct answer)
Take it immediately before leaving home
Take both doses the evening before
Skip it if stools are already clear

Correct answer: Complete it 4-6 hours before the procedure

Split-dose prep is most effective when the second dose is finished 4-6 hours before the procedure, improving mucosal visualization.

Question 14: The primary function of the large intestine is:

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

Correct answer: Water and electrolyte reabsorption

The colon reabsorbs water and electrolytes and forms stool.

Question 15: A sterile package is found to be wet upon removal from storage. What should the nurse do?

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

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 16: 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 10 minutes, with the solution heated to 30°C (86°F).
A minimum soak time of 12 minutes at or above 20°C (68°F). (Correct answer)
A minimum soak time of 20 minutes at or above 25°C (77°F).
A minimum soak time of 5 minutes at any room temperature.

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

Iron (Correct answer)
Selenium
Calcium
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 18: During abdominal assessment, in what order should the nurse perform the examination techniques?

Auscultation, inspection, palpation, percussion
Inspection, auscultation, percussion, palpation (Correct answer)
Inspection, palpation, percussion, auscultation
Palpation, percussion, auscultation, inspection

Correct answer: Inspection, auscultation, percussion, palpation

Auscultation is performed before percussion and palpation because manipulating the abdomen can alter bowel sounds.

Question 19: What is the most common indication for a screening colonoscopy?

Appendicitis
Hernia repair
Colorectal cancer screening (Correct answer)
Gallstone removal

Correct answer: Colorectal cancer screening

Colonoscopy is primarily used to screen for and prevent colorectal cancer.

Question 20: 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
Report black tarry stools or vomiting blood immediately (Correct answer)
Eat a high-fiber, rough-textured diet today

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

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

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 22: A patient with suspected C. difficile infection is admitted. Which infection control measure is essential?

Alcohol-based hand rub alone after patient contact
Contact precautions with soap-and-water handwashing (Correct answer)
Droplet precautions with surgical mask
No special precautions once antibiotics start

Correct answer: Contact precautions with soap-and-water handwashing

C. difficile spores resist alcohol, so gowns, gloves, and mechanical handwashing with soap and water are required.

Question 23: A patient with esophageal varices is prescribed octreotide. What is the primary purpose of this medication?

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

Correct answer: Reduce portal venous pressure

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

Question 24: A patient with active GI bleeding is anticoagulated with warfarin and has an INR of 4.8. The most appropriate reversal strategy is:

Idarucizumab IV
Vitamin K plus fresh frozen plasma or 4-factor prothrombin complex concentrate (PCC) (Correct answer)
Protamine sulfate IV
Andexanet alfa 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 25: 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?

GI bleeding
Tardive dyskinesia (Correct answer)
Excessive sedation
Tachycardia

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 26: The organization SGNA that supports GI nurses stands for what?

Society of Gastroenterology Nurses and Associates (Correct answer)
Society of General Nursing Assistants
Standard GI Nursing Alliance
Surgical GI Nursing Association

Correct answer: Society of Gastroenterology Nurses and Associates

SGNA is the Society of Gastroenterology Nurses and Associates.

Question 27: After a paracentesis removing 6 liters of ascitic fluid, which medication does the nurse anticipate administering?

Oral lactulose
Subcutaneous heparin
IV pantoprazole
IV albumin (Correct answer)

Correct answer: IV albumin

Albumin is given after large-volume paracentesis to prevent post-paracentesis circulatory dysfunction.

Question 28: Which multidrug-resistant organism has been linked to contaminated duodenoscopes during ERCP procedures?

Carbapenem-resistant Enterobacteriaceae (CRE) (Correct answer)
Rhinovirus
Group A Streptococcus
Methicillin-sensitive Staphylococcus aureus

Correct answer: Carbapenem-resistant Enterobacteriaceae (CRE)

CRE outbreaks have been associated with the complex elevator mechanism of duodenoscopes that is difficult to clean.

Question 29: 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?

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

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

Stomach
Duodenum
Terminal ileum
Sigmoid colon (Correct answer)

Correct answer: Sigmoid colon

Diverticula and diverticulitis occur most often in the sigmoid colon.

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.

Questions

35 min

Time Limit

70%

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