CGRN Certification Exam — Questions and Answers

Question 1: What is the primary purpose of chromoendoscopy during upper endoscopy?

Improve general visualization
Measure esophageal pH
Treat mucosal lesions
Enhance detection and characterization of mucosal lesions by highlighting surface patterns (Correct answer)

Correct answer: Enhance detection and characterization of mucosal lesions by highlighting surface patterns

Chromoendoscopy uses dye agents to enhance visualization of mucosal surface patterns for better lesion detection.

Question 2: Which electrolyte abnormality is characteristic of bilious vomiting from a high intestinal obstruction in a neonate?

Hypernatremia with normal pH
Metabolic acidosis with hyperkalemia
Respiratory acidosis
Metabolic alkalosis with hypokalemia and hypochloremia (Correct answer)

Correct answer: Metabolic alkalosis with hypokalemia and hypochloremia

Loss of acidic gastric and intestinal secretions through bilious vomiting causes metabolic alkalosis with hypokalemia and hypochloremia.

Question 3: Two to four hours after eating, a 38-year-old lady complains of melena and a searing sensation in the middle of her stomach. Additionally, nighttime reports of abdominal discomfort exist. Consuming food typically reduces pain. The patient is being treated for:

Gastric ulcer
Duodenal ulcer (Correct answer)
Chronic gastritis
Dumping syndrome

Correct answer: Duodenal ulcer

The described symptoms—epigastric pain occurring 2-4 hours after eating, nighttime abdominal discomfort, relief of pain by consuming food, and melena (indicating GI bleeding)—are classic manifestations of a duodenal ulcer. Unlike gastric ulcers, which often cause pain worsened by eating, duodenal ulcer pain is typically alleviated by food or antacids, and often recurs several hours later or at night.

Question 4: A patient calls the gastroenterology unit three days after a colonoscopy with snare polypectomy, reporting several episodes of bright red blood per rectum. The CGRN understands this is most likely which type of adverse event?

Delayed post-polypectomy hemorrhage (Correct answer)
Irritable bowel syndrome flare-up
Acute diverticulitis
Post-procedure infection

Correct answer: Delayed post-polypectomy hemorrhage

Delayed post-polypectomy hemorrhage can occur from hours to several weeks (up to 30 days) after the procedure, typically when the eschar over the polypectomy site sloughs off. The presentation of hematochezia days after the procedure is characteristic of this complication. Infection, diverticulitis, and IBS are less likely to present in this specific manner directly related to the procedure timing.

Question 5: A patient with a Mallampati score of IV is scheduled for upper endoscopy. What does this indicate?

Potentially difficult airway management if intervention is needed (Correct answer)
Low aspiration risk
No sedation is needed
The procedure should be cancelled

Correct answer: Potentially difficult airway management if intervention is needed

Mallampati IV (only hard palate visible) indicates a potentially difficult airway.

Question 6: What is the mechanism by which sucralfate promotes gastric ulcer healing?

Neutralizes gastric acid
Enhances gastric motility
Forms a protective barrier over the ulcer crater (Correct answer)
Inhibits the proton pump

Correct answer: Forms a protective barrier over the ulcer crater

Sucralfate polymerizes in acidic pH and binds to proteins at the ulcer base, forming a physical barrier.

Question 7: Which of the following time frames should multi-use vials accessed and used be thrown away within unless otherwise indicated by the manufacturer?

One week
60 days
14 days
28 days (Correct answer)

Correct answer: 28 days

Multi-use vials accessed and used should be disposed of within 28 days unless the manufacturer specifies otherwise. Preservatives are included in multi-use vials. However, they are susceptible to bacterial contamination and do not offer virus protection. To avoid accidental contamination, multi-use vials should, wherever feasible, be designated for just one patient and kept in a different location from the treatment area. A fresh needle and syringe should be used each time the vial is accessed.

Question 8: A GI nurse witnesses a breach in sterile technique during endoscopy. The physician dismisses the concern. What should the nurse do?

Accept the physician's decision
Advocate for the patient by escalating through the chain of command (Correct answer)
Wait to see if infection develops
Document but take no further action

Correct answer: Advocate for the patient by escalating through the chain of command

The nurse must advocate for patient safety by escalating through the chain of command.

Question 9: Which bowel preparation outcome is adequate according to the Boston Bowel Preparation Scale?

Total score of 9 (perfect)
Total score of 6 or higher with each segment at least 2 (Correct answer)
Total score of 3 or higher
Any score where the cecum is reached

Correct answer: Total score of 6 or higher with each segment at least 2

An adequate preparation requires a total score ≥6 with each of three segments scoring at least 2.

Question 10: In inflammatory bowel disease, omega-3 fatty acid supplementation is thought to be beneficial due to which mechanism?

Enhancing iron absorption
Increasing mucosal prostaglandin production
Stimulating intestinal motility
Reducing pro-inflammatory leukotriene production (Correct answer)

Correct answer: Reducing pro-inflammatory leukotriene production

Omega-3 fatty acids compete with arachidonic acid and reduce pro-inflammatory leukotrienes, potentially decreasing IBD inflammation.

Question 11: To ensure the efficacy of a reusable high-level disinfectant (e.g., glutaraldehyde, peracetic acid) in an Automated Endoscope Reprocessor (AER) or a manual soaking basin, what quality control measure is essential prior to each use?

Documenting the date the solution was first poured into the basin.
Verifying the solution's temperature is above 25°C (77°F).
Checking the pH of the solution to ensure it is within neutral range.
Testing the solution for its Minimum Effective Concentration (MEC) with a chemical test strip. (Correct answer)

Correct answer: Testing the solution for its Minimum Effective Concentration (MEC) with a chemical test strip.

High-level disinfectant solutions can be diluted by water or inactivated by organic material over time. Professional guidelines require testing the solution for its Minimum Effective Concentration (MEC) before each use or, at a minimum, daily. This ensures the chemical is still potent enough to achieve high-level disinfection.

Question 12: Which complication of acute pancreatitis involves liquefied necrotic pancreatic tissue enclosed in a fibrous wall?

Peripancreatic abscess
Pancreatic pseudocyst
Walled-off necrosis (WON) (Correct answer)
Pancreatic ductal disruption

Correct answer: Walled-off necrosis (WON)

Walled-off necrosis (WON) is a mature, encapsulated collection containing both liquid and solid necrotic debris that develops after necrotizing pancreatitis, distinct from a pseudocyst which contains only fluid.

Question 13: What is the significance of the adenoma detection rate (ADR) as a quality measure?

It measures patient satisfaction
It measures scope insertion speed
It is relevant only to research
It is the proportion of screening colonoscopies finding at least one adenoma, with higher rates correlating with lower interval cancer risk (Correct answer)

Correct answer: It is the proportion of screening colonoscopies finding at least one adenoma, with higher rates correlating with lower interval cancer risk

Each 1% increase in ADR is associated with a 3% decrease in interval colorectal cancer.

Question 14: After an ERCP on a patient with a known Carbapenem-resistant Enterobacteriaceae (CRE) infection, which step in reprocessing the duodenoscope is most critical for preventing transmission due to the complex design of the elevator mechanism?

Automated high-level disinfection, as it provides a standardized, validated cycle.
Manual cleaning, which includes meticulous brushing of the elevator wire channel and elevator recess. (Correct answer)
Final alcohol flush and forced air drying to prevent waterborne pathogen growth.
Leak testing to ensure the integrity of the endoscope's internal channels.

Correct answer: Manual cleaning, which includes meticulous brushing of the elevator wire channel and elevator recess.

The complex elevator mechanism of a duodenoscope is a known site for harboring biofilm and bacteria like CRE, and has been linked to outbreaks. Manual cleaning is the most essential step in removing the heavy bioburden from these hard-to-reach areas. If manual cleaning is inadequate, the subsequent high-level disinfection or sterilization process can fail. Meticulous brushing of the elevator mechanism and its channels is paramount.

Question 15: During ERCP for suspected choledocholithiasis, the nurse notices the patient's oxygen saturation drops to 88%. What is the first action?

Document the finding and continue monitoring
Notify the physician and apply supplemental oxygen (Correct answer)
Increase IV fluid rate
Pause the procedure and administer reversal agents

Correct answer: Notify the physician and apply supplemental oxygen

Desaturation during ERCP is a sedation-related adverse event; the nurse must immediately notify the physician and apply supplemental oxygen to prevent hypoxic injury.

Question 16: During ERCP, the patient develops severe epigastric pain radiating to the back with elevated lipase. What complication has occurred?

Cholangitis
Post-ERCP pancreatitis (Correct answer)
Duodenal perforation
Sphincter of Oddi spasm

Correct answer: Post-ERCP pancreatitis

Post-ERCP pancreatitis is the most common significant ERCP complication, occurring in 3-10% of cases.

Question 17: A patient is undergoing an upper endoscopy with biopsy. Which of the following is an absolute contraindication for this procedure?

Recent myocardial infarction
Patient refusal
Severe coagulopathy
Suspected bowel perforation (Correct answer)

Correct answer: Suspected bowel perforation

A suspected or confirmed bowel perforation is an absolute contraindication to an upper endoscopy because insufflating air into the GI tract can worsen the perforation and lead to life-threatening peritonitis. While the other conditions are relative contraindications and require careful consideration and management, a perforation poses an immediate and severe risk.

Question 18: What is the initial management for acute esophageal food bolus impaction?

Barium swallow to localize
Emergent surgery
IV glucagon trial, then flexible endoscopy if unsuccessful (Correct answer)
Observation for 72 hours

Correct answer: IV glucagon trial, then flexible endoscopy if unsuccessful

Start with IV glucagon 1 mg, then endoscopic removal if the bolus does not pass.

Question 19: A patient with an Automatic Implantable Cardioverter-Defibrillator (AICD) is scheduled for a colonoscopy where electrocautery will be used for a large polypectomy. Which nursing action is most critical to ensure patient safety?

Placing the electrocautery grounding pad on the patient's upper back.
Confirming that the device's antitachycardia functions have been disabled by a qualified professional. (Correct answer)
Administering a prophylactic dose of antibiotics one hour before the procedure.
Verifying the patient has been NPO for at least 8 hours.

Correct answer: Confirming that the device's antitachycardia functions have been disabled by a qualified professional.

Electromagnetic interference (EMI) from electrocautery can be misinterpreted by an AICD as a fatal arrhythmia, which could trigger an inappropriate and dangerous shock. Standard safety protocol requires that the device's antitachycardia functions be temporarily suspended or disabled before the procedure, typically by a cardiology or device specialist, and then re-enabled afterward.

Question 20: A patient presenting with severe epigastric pain radiating to the back, elevated lipase, and grey-Turner sign most likely has which condition?

Peptic ulcer perforation
Mesenteric ischemia
Acute cholecystitis
Acute hemorrhagic pancreatitis (Correct answer)

Correct answer: Acute hemorrhagic pancreatitis

Grey-Turner sign (flank ecchymosis) indicates retroperitoneal hemorrhage, which combined with elevated lipase and epigastric pain is consistent with acute hemorrhagic pancreatitis.

Question 21: A nurse is educating a patient newly diagnosed with celiac disease. Which statement accurately describes the underlying pathophysiology of this condition?

"A bacterial enzyme deficiency prevents the breakdown of gluten, leading to fermentation and bloating."
"The stomach's parietal cells are unable to produce the intrinsic factor needed to digest gluten."
"Ingestion of gluten triggers an autoimmune response that damages the villi of the small intestine." (Correct answer)
"An allergic reaction to gluten causes the release of histamine, leading to gastric upset."

Correct answer: "Ingestion of gluten triggers an autoimmune response that damages the villi of the small intestine."

Celiac disease is an autoimmune disorder where the ingestion of gluten in genetically susceptible individuals leads to an immune-mediated attack on the small intestine. This inflammatory response specifically damages the villi, which are crucial for nutrient absorption, leading to malabsorption and various gastrointestinal and systemic symptoms.

Question 22: Which indicator should be checked daily to verify that an AER is functioning correctly?

Patient infection rates
Biological indicator (spore test)
Staff compliance scores
Minimum effective concentration (MEC) of the disinfectant (Correct answer)

Correct answer: Minimum effective concentration (MEC) of the disinfectant

The MEC must be verified before each use or at least daily using chemical test strips.

Question 23: A 52-year-old patient undergoes an average-risk screening colonoscopy. The findings are limited to two tubular adenomas, both less than 10 mm, which are completely removed. Based on the 2020 U.S. Multi-Society Task Force (USMSTF) guidelines, what is the appropriate recommendation for the next surveillance colonoscopy?

1 year
10 years
7-10 years (Correct answer)
3-5 years

Correct answer: 7-10 years

The 2020 USMSTF guidelines updated the surveillance interval for patients with 1 or 2 small (<10 mm) low-risk adenomas. The recommended interval was extended to 7-10 years, reflecting data that shows this group has a low risk of developing advanced neoplasia, similar to patients with a normal baseline colonoscopy. The 3-5 year interval is reserved for patients with higher-risk findings, such as 3 or more adenomas or a single larger adenoma.

Question 24: What is the primary advantage of CO2 insufflation over room air during endoscopy?

CO2 eliminates the need for sedation
CO2 is less expensive
Better visualization
CO2 is absorbed 150 times faster than nitrogen, reducing post-procedure bloating (Correct answer)

Correct answer: CO2 is absorbed 150 times faster than nitrogen, reducing post-procedure bloating

CO2 is absorbed 150 times faster than nitrogen, dramatically reducing post-procedure distention and pain.

Question 25: A newly certified CGRN is asked to precept a new graduate nurse. Which mentoring practice best supports professional development?

Immediately assign full patient loads without oversight
Provide graduated responsibility with constructive feedback and competency validation (Correct answer)
Have the orientee observe only for the entire orientation
Focus exclusively on technical skills

Correct answer: Provide graduated responsibility with constructive feedback and competency validation

Effective precepting involves graduated responsibility, regular feedback, and formal competency validation.

Question 26: A cirrhotic patient develops sudden onset fever, abdominal pain, and ascitic fluid with PMN count >250 cells/mm³. What is the diagnosis?

Hepatic encephalopathy
Portal hypertensive gastropathy
Secondary bacterial peritonitis
Spontaneous bacterial peritonitis (SBP) (Correct answer)

Correct answer: Spontaneous bacterial peritonitis (SBP)

Spontaneous bacterial peritonitis is defined by an ascitic fluid PMN count ≥250 cells/mm³ without an evident surgically treatable source, and is a life-threatening complication of cirrhosis.

Question 27: A 58-year-old male is scheduled for an EGD to evaluate dysphagia. He has a history of type 2 diabetes and takes metformin. Which pre-procedure instruction by the CGRN is most appropriate?

"You must arrange for a responsible adult to drive you home after the procedure." (Correct answer)
"You can eat a light breakfast, but stop all liquids 4 hours before the EGD."
"Take your metformin with a small sip of water the morning of the procedure."
"Discontinue your aspirin for one day before the procedure."

Correct answer: "You must arrange for a responsible adult to drive you home after the procedure."

Due to the administration of sedation during an EGD, the patient's judgment and reflexes will be impaired. It is a standard safety protocol that the patient must have a responsible adult to drive them home. Patients are typically NPO for 6-8 hours for solids and at least 2 hours for clear liquids. Instructions regarding medications like metformin and aspirin require specific physician orders based on the patient's condition.

Question 28: A patient taking rivaroxaban is scheduled for upper endoscopy. What is the recommended holding time?

24 hours
5-7 days
48 hours (Correct answer)
No need to hold

Correct answer: 48 hours

Rivaroxaban should be held for at least 48 hours before high-risk endoscopic procedures.

Question 29: What additional capability does EUS provide compared to standard EGD?

Therapeutic dilation
Better mucosal surface visualization
Faster procedure time
Cross-sectional imaging of GI wall layers and surrounding structures for submucosal lesion evaluation and cancer staging (Correct answer)

Correct answer: Cross-sectional imaging of GI wall layers and surrounding structures for submucosal lesion evaluation and cancer staging

EUS combines endoscopy with high-frequency ultrasound to visualize individual wall layers and adjacent structures.

Question 30: What is the minimum monitoring requirement during the recovery phase after moderate sedation?

Heart rate monitoring only
Pulse oximetry until discharge
No monitoring required once the procedure ends
Vital signs every 5 minutes until discharge criteria are met (Correct answer)

Correct answer: Vital signs every 5 minutes until discharge criteria are met

Post-procedure monitoring should include vital signs at least every 5 minutes until discharge criteria are met.

Question 31: A CGRN is preparing a 70-year-old patient with a history of Stage 4 chronic kidney disease and congestive heart failure for a colonoscopy. Which type of bowel preparation regimen is absolutely contraindicated for this patient due to the risk of acute phosphate nephropathy and severe electrolyte shifts?

A preparation containing magnesium citrate.
An oral sodium phosphate (OSP) based solution. (Correct answer)
A split-dose, low-volume PEG based solution.
A large-volume polyethylene glycol (PEG) based solution.

Correct answer: An oral sodium phosphate (OSP) based solution.

Oral sodium phosphate (OSP) preparations are absolutely contraindicated in patients with moderate to severe chronic kidney disease (Stage 3-5), heart failure, or liver disease. They can cause significant fluid shifts and electrolyte disturbances, including hyperphosphatemia, which can lead to acute phosphate nephropathy and worsening renal failure. Polyethylene glycol (PEG) based solutions are the safest alternative as they are iso-osmotic and not absorbed systemically.

Question 32: What is the minimum contact time required for high-level disinfection of endoscopes using 2% glutaraldehyde at 25°C?

45 minutes
10 minutes
5 minutes
20 minutes (Correct answer)

Correct answer: 20 minutes

High-level disinfection with 2% glutaraldehyde requires a minimum of 20 minutes at 25°C.

Question 33: What is the primary purpose of continuing education for maintaining CGRN certification?

To ensure ongoing competency and currency in GI nursing practice (Correct answer)
To increase certification cost
To satisfy hospital HR requirements
To limit the number of certified nurses

Correct answer: To ensure ongoing competency and currency in GI nursing practice

CE requirements ensure certified nurses maintain current knowledge in the rapidly evolving field of GI nursing.

Question 34: What is the primary risk associated with electrocautery polypectomy in the right colon compared to the left?

Increased polyp recurrence
Higher perforation rate due to thinner wall (Correct answer)
Greater patient discomfort
Higher bleeding rate

Correct answer: Higher perforation rate due to thinner wall

The right colon has a thinner wall, increasing perforation risk with electrocautery.

Question 35: A patient complains of fever, flatulence, left lower quadrant stomach discomfort that worsens with coughing and straining, and feverish symptoms. Also mentioned are changes in bowel habits. Upon physical examination, a palpable, sensitive rectal tumor is discovered. Intestinal mucosal inflammation and outpouchings are seen on a CT scan of the sigmoid colon. The most likely diagnosis for the patient is:

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

Correct answer: Diverticulitis

The patient's symptoms—left lower quadrant pain, fever, flatulence, changes in bowel habits, and especially the CT scan findings of intestinal mucosal inflammation and 'outpouchings' (diverticula) in the sigmoid colon—are classic indicators of diverticulitis. This condition occurs when small pouches in the colon wall become inflamed or infected. The palpable rectal tumor could be an inflammatory mass or abscess related to the diverticulitis.

Question 36: Which type of biliary stricture is most likely to develop after laparoscopic cholecystectomy?

Bismuth type I — low common bile duct stricture (Correct answer)
Hilum stricture with hepatic duct involvement
Cystic duct remnant stricture
Intrahepatic biliary stricture

Correct answer: Bismuth type I — low common bile duct stricture

Post-cholecystectomy bile duct injury most commonly occurs at the distal common bile duct, classified as Bismuth type I, due to clip misplacement or thermal injury during surgery.

Question 37: The human liver can regenerate to its original size after losing what percentage of its mass?

Up to 75% (Correct answer)
50%
25%
10%

Correct answer: Up to 75%

The liver can regrow from as little as 25% of its original tissue, enabling living donor liver transplantation.

Question 38: Which finding on liver biopsy is most characteristic of nonalcoholic steatohepatitis (NASH) compared to simple steatosis?

Lobular inflammation with hepatocyte ballooning (Correct answer)
Periportal fibrosis alone
Bile duct proliferation
Macrovesicular fat deposition

Correct answer: Lobular inflammation with hepatocyte ballooning

NASH is distinguished from simple steatosis by the presence of lobular inflammation and hepatocyte ballooning injury, often with pericellular fibrosis. These features indicate active liver injury and progression risk, whereas steatosis alone lacks these inflammatory components.

Question 39: A patient takes bisphosphonates (alendronate). Why is this relevant to pre-endoscopy assessment?

They interact with sedation medications
They have no GI relevance
Bisphosphonates improve endoscopy visibility
They can cause esophageal erosions and ulcers that may be seen during EGD (Correct answer)

Correct answer: They can cause esophageal erosions and ulcers that may be seen during EGD

Oral bisphosphonates can cause esophageal irritation, erosions, and ulcers.

Question 40: Which esophageal foreign body is considered a medical emergency requiring immediate removal?

Coin in the stomach for <24 hours
Button battery lodged in the esophagus (Correct answer)
Blunt object in the stomach for <48 hours
Food bolus in the stomach

Correct answer: Button battery lodged in the esophagus

A button battery in the esophagus causes rapid electrochemical burns and must be removed immediately.

Question 41: A medical device malfunctions during endoscopy, causing minor patient injury. What reporting obligations apply?

Internal incident report, risk management notification, and FDA MedWatch if device caused/contributed to injury (Correct answer)
No reporting for minor injuries
Report only if patient requests
Report to manufacturer only

Correct answer: Internal incident report, risk management notification, and FDA MedWatch if device caused/contributed to injury

Device-related injuries require internal reporting, risk management notification, and FDA MedWatch reporting.

Question 42: The dementia that Janis Long, an 88-year-old customer, is suffering from is advanced. The nurse chooses to attach a bed exit safety monitoring device to the patient on a particularly busy day. The advantages of this gadget are as follows, with the exception of:

Prevents nighttime wandering
Alerts the nurse if the client is attempting to get out of bed
Decreases the risk of client falls
Safely limits the mobility of the client (Correct answer)

Correct answer: Safely limits the mobility of the client

The client can move about without being constrained by a bed exit safety monitoring system. A bed exit safety monitoring system lowers the possibility of client falls and instantly alerts the medical staff if the client attempts to escape the bed. Additionally, it is a tool that can stop a case of nighttime roaming. The nurse should explain to the client and accompanying family members that this device does not restrict the client's movement. When the client requires help getting out of bed, the client should be told to telephone the nurse.

Question 43: Which finding is most concerning for eosinophilic esophagitis (EoE) in a school-age child?

Rectal prolapse
Painless jaundice
Recurrent food impaction and dysphagia (Correct answer)
Intermittent watery diarrhea

Correct answer: Recurrent food impaction and dysphagia

EoE presents with food impaction and dysphagia in children and adolescents due to eosinophilic infiltration causing esophageal remodeling.

Question 44: A patient with hemochromatosis is found to have a serum ferritin of 2,800 ng/mL and transferrin saturation of 72%. What is the first-line treatment?

Therapeutic phlebotomy weekly until ferritin < 50 ng/mL (Correct answer)
Dietary iron restriction alone
Intravenous deferoxamine chelation therapy
Liver transplant evaluation

Correct answer: Therapeutic phlebotomy weekly until ferritin < 50 ng/mL

Therapeutic phlebotomy is the cornerstone treatment for hereditary hemochromatosis, removing approximately 250 mg of iron per unit of blood until ferritin is normalized to below 50 ng/mL.

Question 45: What is the role of simethicone when administered before upper endoscopy?

To reduce surface tension of gas bubbles, improving mucosal visualization (Correct answer)
To reduce gastric acid secretion
To provide local anesthesia
To promote gastric emptying

Correct answer: To reduce surface tension of gas bubbles, improving mucosal visualization

Simethicone is an anti-foaming agent that disperses gas bubbles to improve mucosal visualization.

Question 46: The ligament of Treitz marks the transition between which two portions of the GI tract?

Stomach and duodenum
Jejunum and ileum
Ileum and cecum
Duodenum and jejunum (Correct answer)

Correct answer: Duodenum and jejunum

The ligament of Treitz marks the duodenojejunal junction and is an important anatomic landmark separating upper from lower GI bleeding.

Question 47: What is the recommended hand hygiene practice immediately before and after every endoscopic procedure?

Handwashing with plain soap for 15 seconds
Alcohol-based hand rub or handwashing with antimicrobial soap for at least 20 seconds (Correct answer)
Donning sterile surgical gloves without hand hygiene
Rinsing hands with water only

Correct answer: Alcohol-based hand rub or handwashing with antimicrobial soap for at least 20 seconds

CDC and WHO recommend alcohol-based hand rub or antimicrobial soap handwashing for at least 20 seconds before and after patient contact.

Question 48: During endoscopy, which transmission-based precaution is required for a patient with active pulmonary tuberculosis?

Airborne precautions with N95 respirator (Correct answer)
Standard precautions are sufficient
Contact precautions only
Droplet precautions

Correct answer: Airborne precautions with N95 respirator

Active pulmonary TB requires airborne precautions including N95 respirator and negative-pressure room.

Question 49: What is the correct sequence of steps in manual endoscope reprocessing?

Clean, sterilize, rinse, use
Disinfect, clean, rinse, dry
Pre-clean, leak test, manual clean, rinse, HLD, rinse, dry (Correct answer)
Rinse, disinfect, clean, store

Correct answer: Pre-clean, leak test, manual clean, rinse, HLD, rinse, dry

The correct sequence ensures each step builds on the previous one to maximize reprocessing efficacy.

Question 50: Which organism is the most frequently reported pathogen associated with endoscope-related infections due to inadequate reprocessing?

Staphylococcus aureus
Pseudomonas aeruginosa (Correct answer)
Escherichia coli
Clostridium difficile

Correct answer: Pseudomonas aeruginosa

Pseudomonas aeruginosa is most commonly reported due to its ability to thrive in moist environments and form resilient biofilms.

Question 51: A patient presents with steatorrhea and fat-soluble vitamin deficiencies. Which portion of the small intestine is most likely affected?

Duodenum
Jejunum (Correct answer)
Cecum
Ileum

Correct answer: Jejunum

The jejunum is the primary site for absorption of fats, carbohydrates, and proteins.

Question 52: Which type of polyp has the highest malignant potential in the colon?

Tubular adenoma
Hyperplastic polyp
Villous adenoma (Correct answer)
Inflammatory polyp

Correct answer: Villous adenoma

Villous adenomas have the highest malignant potential among colonic polyps, with a 15-40% risk of containing carcinoma.

Question 53: A patient undergoing upper endoscopy is found to have Barrett's esophagus without dysplasia. What is the recommended surveillance interval?

Every 1 year
Every 6 months
Every 3–5 years (Correct answer)
No further surveillance needed

Correct answer: Every 3–5 years

Non-dysplastic Barrett's esophagus carries a low risk of progression to adenocarcinoma. Current guidelines (ACG/AGA) recommend surveillance endoscopy every 3–5 years rather than more frequent intervals, which are reserved for low-grade or high-grade dysplasia.

Question 54: During the manual cleaning phase, a reprocessing technician performs a leak test on a colonoscope and discovers a continuous stream of bubbles emerging from the bending section. What is the most appropriate immediate action?

Abort reprocessing, remove the scope from water while still pressurized, and send it for immediate repair. (Correct answer)
Submerge the scope deeper and angulate the controls to confirm the leak's exact location.
Finish the manual cleaning, but skip high-level disinfection and send the scope for repair.
Continue the reprocessing cycle but label the scope for repair after disinfection.

Correct answer: Abort reprocessing, remove the scope from water while still pressurized, and send it for immediate repair.

A positive leak test indicates a breach in the endoscope's integrity. Continuing to immerse the scope will allow fluid to enter internal mechanisms, causing significant damage and creating a potential source for infection that cannot be reached by disinfectant. The correct action is to stop the reprocessing, remove the scope from the water, and send it for repair according to facility protocol.

Question 55: Which nutritional support route is preferred when a patient's GI tract is functional but oral intake is insufficient?

Total parenteral nutrition (TPN)
Enteral nutrition via nasogastric tube (Correct answer)
IV dextrose only
Peripheral parenteral nutrition

Correct answer: Enteral nutrition via nasogastric tube

Enteral nutrition is preferred over parenteral nutrition when the GI tract is functional because it preserves gut mucosal integrity.

Question 56: A patient asks what Helicobacter pylori is. Which response is most accurate?

A virus causing stomach flu
A bacterium that colonizes the stomach and is the primary cause of peptic ulcers and a risk factor for gastric cancer (Correct answer)
A normal part of the gut microbiome
A fungal infection of the esophagus

Correct answer: A bacterium that colonizes the stomach and is the primary cause of peptic ulcers and a risk factor for gastric cancer

H. pylori is a gram-negative bacterium causing peptic ulcers and classified as a WHO Group 1 carcinogen.

Question 57: Docusate sodium is prescribed to an older patient. The drug's therapeutic effect is felt by the patient if they are going through any of the following:

Reduction of steatorrhea
Relief of diarrhea
Relief of abdominal pain
Softer stools during bowel movements (Correct answer)

Correct answer: Softer stools during bowel movements

A stool softener called docusate sodium prevents water from being absorbed, enabling regular bowel movements. The alternate choices are incorrect.

Question 58: Which of the following dairy products has the LOWEST CONTENT for lactose intolerant people?

Greek-style whole-fat yogurt (Correct answer)
Whole milk
Cheese
Regular whole-fat yogurt

Correct answer: Greek-style whole-fat yogurt

People who are lactose intolerant are more likely to accept Greek yogurt than other dairy products because it is thicker than conventional whole-fat yogurt, more of the whey is eliminated, and the lactose is part of the whey. Due to a lack of the enzyme required to digest lactose, those lactose intolerant experience stomach pain, gas, distention, and diarrhea after consuming dairy products. Today, certain dairy products are lactose-free, and Lactaid® can be used to supplement lost enzymes.

Question 59: Which organization administers the CGRN certification examination?

National Board of Surgical Technology
Certifying Board of Gastroenterology Nurses and Associates (CBGNA/ABCGN) (Correct answer)
ANCC
AGA

Correct answer: Certifying Board of Gastroenterology Nurses and Associates (CBGNA/ABCGN)

CBGNA/ABCGN is the sole organization administering the CGRN certification examination.

Question 60: A patient on phenytoin is given IV diazepam for endoscopy. What interaction should the nurse anticipate?

Phenytoin levels may increase, leading to toxicity (Correct answer)
Phenytoin will be inactivated
Diazepam will have no sedative effect
No significant interaction

Correct answer: Phenytoin levels may increase, leading to toxicity

Diazepam and phenytoin compete for protein binding and metabolic pathways, potentially increasing free phenytoin.

Question 61: A patient with a history of chronic liver disease is being evaluated for complications related to portal hypertension. Which pathophysiological mechanism is the primary cause of increased pressure in the portal venous system?

A decreased production of albumin by the hepatocytes, leading to fluid shifts.
An increased resistance to blood flow within the cirrhotic liver. (Correct answer)
Splanchnic vasodilation leading to a decrease in systemic blood pressure.
The formation of extensive portosystemic collateral veins.

Correct answer: An increased resistance to blood flow within the cirrhotic liver.

The primary cause of portal hypertension in cirrhosis is the increased resistance to portal blood flow within the liver. This resistance is due to both structural changes (fibrosis, regenerative nodules) and a dynamic component (intrahepatic vasoconstriction). While splanchnic vasodilation and collateral formation are consequences that exacerbate the condition, they are not the initial cause. Decreased albumin production contributes to ascites but is not the primary driver of the increased pressure itself.

Question 62: According to the Spaulding classification, endoscopes that contact intact mucous membranes are categorized as which level of device?

Semi-critical (Correct answer)
Non-critical
Critical
Sterile

Correct answer: Semi-critical

Semi-critical devices contact intact mucous membranes and require high-level disinfection at minimum.

Question 63: Which finding on a liver biopsy is most characteristic of primary biliary cholangitis (PBC)?

Bridging fibrosis without bile duct changes
Granulomatous destruction of bile ducts (Correct answer)
Steatosis with lobular inflammation
Centrilobular necrosis

Correct answer: Granulomatous destruction of bile ducts

PBC is characterized by autoimmune granulomatous destruction of interlobular and septal bile ducts, which is pathognomonic for this condition.

Question 64: A patient with Crohn's disease is at highest risk for deficiency of which vitamin due to terminal ileum involvement?

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

Correct answer: Vitamin B12

Vitamin B12 is absorbed exclusively in the terminal ileum, which is frequently diseased in Crohn's disease.

Question 65: A patient with Crohn's disease presents with a new perianal fistula. Which medication class is most effective for inducing closure of perianal fistulas in Crohn's disease?

5-aminosalicylates (5-ASA)
Azathioprine monotherapy
Anti-TNF biologics (Correct answer)
Corticosteroids

Correct answer: Anti-TNF biologics

Anti-TNF agents such as infliximab have demonstrated efficacy specifically for inducing and maintaining perianal fistula closure in Crohn's disease in landmark trials. 5-ASA agents are not effective for fistulizing disease, and corticosteroids may worsen fistulas.

Question 66: Who is credited with performing the first complete colonoscopy reaching the cecum, in 1969?

Basil Hirschowitz
William Wolff and Hiromi Shinya (Correct answer)
Allen Whipple
Rudolf Schindler

Correct answer: William Wolff and Hiromi Shinya

William Wolff and Hiromi Shinya performed the first complete colonoscopy to the cecum at Beth Israel Medical Center in New York in 1969, a landmark achievement in endoscopic medicine.

Question 67: A patient develops severe abdominal pain, rigidity, and free air on X-ray after colonoscopy with polypectomy. What is the diagnosis?

Colonic perforation (Correct answer)
Acute pancreatitis
Post-polypectomy syndrome
Ileus

Correct answer: Colonic perforation

Free air (pneumoperitoneum) with peritoneal signs after colonoscopy indicates colonic perforation.

Question 68: A CGRN spends time discussing a patient's fears about a recommended surveillance colonoscopy, provides educational materials, and respects the patient's ultimate decision to refuse the procedure at this time. This nurse's actions primarily uphold which ethical principle?

Non-maleficence
Justice
Autonomy (Correct answer)
Beneficence

Correct answer: Autonomy

Autonomy is the ethical principle that recognizes an individual's right to self-determination and to make their own informed decisions about their healthcare, free from coercion. By providing information and then supporting the patient's informed choice to refuse treatment, the nurse is respecting their autonomy.

Question 69: During colonoscopy, a 1.5 cm sessile polyp is encountered. Which removal technique is most appropriate?

Cold forceps biopsy
Observation only
Cold snare polypectomy
Endoscopic mucosal resection (EMR) (Correct answer)

Correct answer: Endoscopic mucosal resection (EMR)

For sessile polyps 10-20 mm, EMR using submucosal injection and snare is preferred.

Question 70: A patient with chronic sinusitis experiences inadequate ventilation as a result of the nasal airways being constrained or blocked. The nurse is aware that inadequate ventilation might result in inadequate nasal drainage. Which of the following comfort care procedures did the nurse NOT apply to this client?

Apply warm wrap or compress over the sinuses.
Encourage increase oral fluid intake.
Increase the humidity of the environment.
Encourage plenty of rest in the day. (Correct answer)

Correct answer: Encourage plenty of rest in the day.

To prevent getting too little sleep at night, the nurse should rather discourage getting much of rest during the day. Chronic sinusitis patients frequently express weariness from a lack of sleep. Breathing problems, persistent headaches, and periorbital discomfort frequently interfere with sleep habits. Nasal stuffiness is worst in the morning. Better nasal drainage is encouraged by increasing oral fluid intake and humidity. Warm compresses applied to the sinuses would cause the sinuses to open up, reducing nasal congestion.

Question 71: A colleague has been charting vital signs as stable without actually checking the patient during sedation recovery. What is the appropriate first action?

Address the colleague directly and report to the charge nurse/supervisor (Correct answer)
Ignore it
Document in the patient's chart
Report directly to the state board

Correct answer: Address the colleague directly and report to the charge nurse/supervisor

Address the unsafe practice directly and report to the charge nurse to ensure immediate patient safety.

Question 72: What is the most common cause of acute pancreatitis?

Hypertriglyceridemia
Alcohol consumption
Gallstones (Correct answer)
Medications

Correct answer: Gallstones

Gallstones account for approximately 40% of acute pancreatitis cases.

Question 73: During colonoscopy with CO2 insufflation, the patient develops abdominal distention and discomfort. What is the most likely cause?

Bowel perforation
Normal response to CO2
CO2 toxicity
Excessive insufflation rate (Correct answer)

Correct answer: Excessive insufflation rate

Even with CO2, excessive insufflation can cause distention if the rate exceeds absorption.

Question 74: How often should AERs be validated for proper function?

Annually only
Monthly visual inspection is sufficient
Only when an infection is reported
At installation, after maintenance/repair, and at regular intervals per manufacturer recommendations (Correct answer)

Correct answer: At installation, after maintenance/repair, and at regular intervals per manufacturer recommendations

AERs require validation at multiple points in their lifecycle, not just on a single schedule.

Question 75: Which one of the following is a benzodiapine reversal medication for an overly sedated patient?

Romazicon (Flumazenil) (Correct answer)
N=acetylcysteine
Atropine
Naloxone (Narcan)

Correct answer: Romazicon (Flumazenil)

Although it does not cure respiratory depression, Romazicon (Flumazenil®) is a reversal medication for excessive sedation of a patient who has received a benzodiazepine. Romazicon is injected intravenously in increments of 0.2 mg over 30 seconds, with further doses given as necessary at one-minute intervals. The third and subsequent dosages are 0.5 mg, with the second dose being 0.3 mg. Naloxone is used to treat opioid overdoses, epinephrine treats asystole, VF, and PEA urgently, and N-acetylcysteine treats acetaminophen overdose.

Question 76: Absorption of carbohydrates' most typical disorder.

Choledocholithiasis
Lactose Intolerance (Correct answer)
Rectal Prolapse
Weakness and malaise

Correct answer: Lactose Intolerance

Lactose intolerance is the most prevalent disorder of carbohydrate absorption. It results from a deficiency of lactase, the enzyme needed to break down lactose (a sugar in dairy products) into absorbable glucose and galactose. Without sufficient lactase, undigested lactose ferments in the colon, leading to characteristic symptoms like bloating, gas, abdominal pain, and diarrhea after consuming dairy.

Question 77: A child with celiac disease who is non-compliant with a gluten-free diet is at increased long-term risk for which GI complication?

Diverticular disease
Appendicitis
Enteropathy-associated T-cell lymphoma (Correct answer)
Hemorrhoids

Correct answer: Enteropathy-associated T-cell lymphoma

Persistent gluten exposure in celiac disease causes chronic intestinal inflammation that increases the risk of enteropathy-associated T-cell lymphoma.

Question 78: What is the most common indication for performing an EGD?

Annual cancer surveillance
Weight loss surgery planning
Evaluation of persistent upper GI symptoms refractory to medical therapy (Correct answer)
Routine health screening

Correct answer: Evaluation of persistent upper GI symptoms refractory to medical therapy

EGD is most commonly indicated for upper GI symptoms that persist despite appropriate medical therapy or present with alarm features.

Question 79: Which ancient civilization is credited with the earliest known descriptions of GI diseases on medical papyri?

Ancient Rome
Ancient Egypt (Correct answer)
Ancient China
Ancient Greece

Correct answer: Ancient Egypt

Ancient Egypt's Ebers Papyrus (circa 1550 BCE) contains some of the earliest known medical descriptions of GI conditions.

Question 80: Which PPI has the strongest CYP2C19 inhibition and highest drug interaction potential?

Omeprazole (Correct answer)
Pantoprazole
Esomeprazole
Rabeprazole

Correct answer: Omeprazole

Omeprazole has the strongest CYP2C19 inhibitory effect, particularly affecting clopidogrel.

Question 81: One potentially dangerous consequence of ____ is toxic mega colon.

Crohn's disease
Irritable bowel syndrome (ibs)
Celiac disease
Ulcerative colitis (UC) (Correct answer)

Correct answer: Ulcerative colitis (UC)

Toxic megacolon is a severe and life-threatening complication characterized by acute, non-obstructive dilation of the colon accompanied by systemic toxicity. It is most commonly associated with severe inflammatory bowel diseases, particularly ulcerative colitis (UC). The intense inflammation in UC can lead to paralysis of the colonic musculature, causing it to distend significantly and increasing the risk of perforation and sepsis.

Question 82: Which assessment finding suggests total parenteral nutrition (TPN) line sepsis?

Temperature 38.9°C with chills and erythema at the catheter site (Correct answer)
Serum albumin of 3.2 g/dL
Mild peripheral edema
Blood glucose of 110 mg/dL

Correct answer: Temperature 38.9°C with chills and erythema at the catheter site

Fever, chills, and local site inflammation are classic signs of central line-associated bloodstream infection (CLABSI) in TPN patients.

Question 83: During the reprocessing of a colonoscope, the CGRN discovers a small crack in the insertion tube's sheath that was not noted prior to the last procedure. Which of the following actions best demonstrates professional accountability?

Informing the endoscopist who last used the scope about the potential for cross-contamination.
Immediately quarantining the scope, completing an incident report, and notifying the nurse manager and risk management. (Correct answer)
Discussing the finding with a senior colleague to determine if it is a significant problem.
Documenting the equipment malfunction in the unit's internal maintenance log.

Correct answer: Immediately quarantining the scope, completing an incident report, and notifying the nurse manager and risk management.

Professional accountability involves taking responsibility for actions and ensuring patient safety. The most comprehensive and accountable action is to immediately remove the faulty equipment from service, formally document the event through an incident report for tracking and investigation, and notify the appropriate leadership (nurse manager) and departments (risk management). This ensures a thorough investigation into any potential patient impact and adherence to safety protocols.

Question 84: During a flexible sigmoidoscopy on an unsedated patient, the patient suddenly becomes pale, diaphoretic, and complains of nausea. The monitor shows a heart rate of 45 bpm and a blood pressure of 88/50 mmHg. What is the nurse's priority intervention?

Administer atropine as per standing orders
Place the patient in a Trendelenburg or supine position with legs elevated (Correct answer)
Administer a rapid fluid bolus
Prepare for emergency intubation

Correct answer: Place the patient in a Trendelenburg or supine position with legs elevated

The patient is exhibiting classic signs of a vasovagal response (bradycardia, hypotension, pallor, diaphoresis). The immediate priority is to increase cerebral perfusion and venous return to the heart. Placing the patient in a Trendelenburg or supine position with legs elevated is the fastest, non-pharmacological first-line intervention. While atropine and IV fluids may be necessary if the condition persists, they are subsequent steps after initial positioning.

Question 85: A patient on warfarin develops melena 5 days after sphincterotomy with INR 4.2. What is the priority?

Administer vitamin K and FFP, correct INR, assess for repeat endoscopy (Correct answer)
Observe and recheck INR in 24 hours
Initiate heparin bridge therapy
Repeat ERCP immediately

Correct answer: Administer vitamin K and FFP, correct INR, assess for repeat endoscopy

Correct coagulopathy with vitamin K and FFP while preparing for possible endoscopic intervention.

Question 86: A CGRN is preparing a room for a patient with a confirmed, active Clostridioides difficile infection. In addition to standard and contact precautions, which environmental cleaning measure is required?

Ensuring the room is under negative pressure ventilation.
Using an EPA-registered sporicidal disinfectant for daily and terminal cleaning. (Correct answer)
Wiping all high-touch surfaces with a standard quaternary ammonium-based disinfectant.
Placing an air purifier with a HEPA filter in the room.

Correct answer: Using an EPA-registered sporicidal disinfectant for daily and terminal cleaning.

*C. difficile* forms spores that are resistant to standard hospital disinfectants, including alcohol and quaternary ammonium compounds. Guidelines from the CDC mandate the use of an EPA-registered sporicidal agent (List K) to effectively kill these spores on environmental surfaces and prevent transmission.

Question 87: A patient taking clopidogrel for a recent coronary stent needs elective colonoscopy with polypectomy. How should the medication be managed?

Switch to aspirin 5 days before
Continue without interruption
Hold for 24 hours before
Discontinue 7 days before (Correct answer)

Correct answer: Discontinue 7 days before

Guidelines recommend discontinuing clopidogrel 5-7 days before high-risk endoscopic procedures, coordinated with the cardiologist.

Question 88: Which laboratory value is most important before endoscopic variceal band ligation?

Hemoglobin A1C
Serum creatinine
Platelet count and INR/coagulation studies (Correct answer)
Serum albumin

Correct answer: Platelet count and INR/coagulation studies

Platelet count and coagulation studies are essential to assess bleeding risk in patients with portal hypertension.

Question 89: Immediately following an upper endoscopy, the CGRN begins the first step of endoscope reprocessing at the point of use. Which of the following actions is correct?

Wiping the insertion tube with a detergent-soaked cloth and flushing air/water and suction channels with an enzymatic solution. (Correct answer)
Detaching all valves and placing them in a separate bag for transport.
Transporting the scope in a covered basin directly to the decontamination room.
Immersing the entire endoscope in a basin of sterile water to prevent drying.

Correct answer: Wiping the insertion tube with a detergent-soaked cloth and flushing air/water and suction channels with an enzymatic solution.

The first and most critical step, known as point-of-use treatment or pre-cleaning, must occur at the bedside immediately after the procedure. This involves wiping the exterior and flushing the channels with a detergent/enzymatic solution to prevent bioburden from drying, which would make subsequent cleaning steps less effective.

Question 90: What is the difference between diagnostic and therapeutic endoscopy?

Diagnostic is by nurses, therapeutic by physicians
Diagnostic uses sedation while therapeutic does not
No difference
Diagnostic examines and biopsies; therapeutic treats conditions like bleeding, strictures, or removes lesions (Correct answer)

Correct answer: Diagnostic examines and biopsies; therapeutic treats conditions like bleeding, strictures, or removes lesions

Diagnostic endoscopy focuses on visualization and biopsy; therapeutic involves interventional treatment.

Question 91: Which vitamin deficiency is most likely in a patient who has had a total gastrectomy?

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

Correct answer: Vitamin B12

Total gastrectomy eliminates intrinsic factor production, making B12 absorption impossible without supplementation.

Question 92: What is the significance of the AAMI ST91 standard in endoscope reprocessing?

Applies only to surgical instruments
Provides comprehensive guidelines for flexible endoscope reprocessing including water quality, chemical selection, monitoring, and facility design (Correct answer)
Governs medical waste disposal
Regulates pharmaceutical manufacturing

Correct answer: Provides comprehensive guidelines for flexible endoscope reprocessing including water quality, chemical selection, monitoring, and facility design

AAMI ST91 is the comprehensive national standard governing all aspects of endoscope reprocessing.

Question 93: During EGD, a Forrest Ia bleeding ulcer is identified. What does this classification indicate?

Clean-based ulcer
Visible vessel without active bleeding
Adherent clot on ulcer base
Active spurting arterial hemorrhage (Correct answer)

Correct answer: Active spurting arterial hemorrhage

Forrest Ia indicates active spurting hemorrhage, carrying the highest rebleeding risk.

Question 94: What is the recommended minimum withdrawal time during a screening colonoscopy?

6 minutes (Correct answer)
2 minutes
4 minutes
10 minutes

Correct answer: 6 minutes

A minimum 6-minute withdrawal time is recommended to maximize adenoma detection rates.

Question 95: Which diabetes medications should be held on the morning of endoscopy?

ACE inhibitors
Sulfonylureas and prandial insulin doses (Correct answer)
Beta-blockers
Calcium channel blockers

Correct answer: Sulfonylureas and prandial insulin doses

Sulfonylureas and prandial insulin stimulate insulin release or cover meals, risking hypoglycemia during fasting.

Question 96: Which statement about probiotics in GI nursing is most accurate?

Probiotics are only beneficial for ulcerative colitis
Probiotics are contraindicated in all immunocompromised patients
Probiotics require a prescription in the United States
Probiotics have strong evidence for preventing C. difficile-associated diarrhea (Correct answer)

Correct answer: Probiotics have strong evidence for preventing C. difficile-associated diarrhea

Evidence supports probiotic use (especially Saccharomyces boulardii and Lactobacillus) for reducing antibiotic-associated and C. difficile diarrhea.

Question 97: Which scoring system assesses mortality risk from upper GI bleeding after endoscopy?

Glasgow-Blatchford Score
APACHE II Score
Complete Rockall Score (Correct answer)
MELD Score

Correct answer: Complete Rockall Score

The complete Rockall score incorporates clinical parameters and endoscopic findings to assess rebleeding and mortality risk.

Question 98: 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)
GI bleeding
Tachycardia
Excessive sedation

Correct answer: Tardive dyskinesia

Patients who combine metoclopramide with haloperidol are more likely to get tardive dyskinesia due to this medication interaction. Both medications can potentially create uncontrolled movement problems, and their combination can have a fatal neuroleptic malignant syndrome. With metoclopramide medication lasting more than 12 weeks, there is an increased chance of developing tardive dyskinesia. Numerous additional medications, such as phenothiazines and other antipsychotics, as well as metoclopramide, may interact with one another.

Question 99: A patient with a lacunar cerebrovascular accident nine days ago is undergoing passive range-of-motion exercises. The nurse feels muscle stiffness in the afflicted extremity, the left arm. What does the nurse do after that?

Continue with the range of motion exercises
Notify the physician
Administer PRN pain medication, if there is any
Apply gentle pressure on the spastic part (Correct answer)

Correct answer: Apply gentle pressure on the spastic part

After a cerebrovascular accident (stroke), muscle stiffness and spasticity are common in affected limbs. When performing passive range-of-motion exercises and encountering stiffness, applying gentle, sustained pressure or a slow, controlled stretch to the spastic muscle can help to relax it and reduce resistance. This technique is a standard part of neurological rehabilitation to manage spasticity and prevent contractures, promoting better movement without causing harm.

Question 100: In a patient with hepatic encephalopathy, which dietary modification is recommended?

Eliminate all fats from the diet
Moderate protein intake with preference for branched-chain amino acids (Correct answer)
Protein restriction to 20 g/day
High-protein diet to promote healing

Correct answer: Moderate protein intake with preference for branched-chain amino acids

Current guidelines recommend moderate protein (1.2–1.5 g/kg/day) with branched-chain amino acids rather than severe protein restriction.

Question 101: What is the significance of Mackler's triad (vomiting, lower thoracic pain, subcutaneous emphysema)?

Mallory-Weiss tear
Esophageal variceal rupture
Aortoesophageal fistula
Boerhaave syndrome (spontaneous esophageal rupture) (Correct answer)

Correct answer: Boerhaave syndrome (spontaneous esophageal rupture)

Mackler's triad is the classic presentation of Boerhaave syndrome.

Question 102: An 85-year-old patient with mild dementia is scheduled for an EGD. The healthcare proxy (the patient's son) has signed the consent. In the pre-procedure area, the patient becomes agitated and repeatedly states, "I don't want this, leave me alone." Which action by the CGRN best demonstrates patient advocacy?

Administer the prescribed anxiolytic to calm the patient and facilitate the procedure.
Pause the pre-procedure process and immediately notify the gastroenterologist of the patient's refusal. (Correct answer)
Gently remind the patient that their son has already provided consent on their behalf.
Proceed with the preparation because a valid, legal consent has already been obtained from the proxy.

Correct answer: Pause the pre-procedure process and immediately notify the gastroenterologist of the patient's refusal.

Patient advocacy requires the nurse to protect the patient's rights and dignity. Even when a legal proxy has given consent, the patient's expressed refusal at the time of the procedure must be taken seriously. The most ethical action is to halt the process and inform the physician. Proceeding against the patient's active and repeated refusal could be considered battery. The physician must then reassess the situation with the healthcare proxy.

Question 103: According to the professional standards for gastroenterology nursing, which of the following tasks falls outside the scope of practice for a Certified Gastroenterology Registered Nurse (CGRN)?

Administering moderate sedation under the direct supervision of a physician.
Performing an initial assessment of a patient's readiness for a procedure.
Providing post-procedure discharge instructions regarding diet and activity.
Interpreting histologic findings from a biopsy specimen to the patient. (Correct answer)

Correct answer: Interpreting histologic findings from a biopsy specimen to the patient.

Interpreting histologic (pathology) results is a diagnostic function that falls exclusively within the scope of practice of a licensed physician, such as a pathologist or the gastroenterologist. While a CGRN can reinforce information already provided by the physician, they cannot provide the initial interpretation or diagnosis to the patient. The other options are core competencies of a GI nurse.

Question 104: A nurse is assisting with a pediatric colonoscopy when the patient develops bradycardia and oxygen desaturation. What is the priority intervention?

Stop the procedure, remove the scope, administer oxygen, and notify the physician (Correct answer)
Document the finding and continue monitoring
Increase the sedation dose to prevent patient movement
Administer atropine IV immediately and continue the procedure

Correct answer: Stop the procedure, remove the scope, administer oxygen, and notify the physician

Bradycardia with desaturation represents a potential airway/sedation emergency; the procedure must stop and resuscitation measures initiated immediately.

Question 105: What does informed consent require for endoscopic procedures?

Consent is implied when the patient arrives
The physician explains risks, benefits, alternatives and the patient demonstrates understanding and agrees voluntarily (Correct answer)
The patient signs a form
The nurse explains the procedure

Correct answer: The physician explains risks, benefits, alternatives and the patient demonstrates understanding and agrees voluntarily

Informed consent is a process requiring disclosure, understanding, voluntariness, and capacity — not just a signed form.

Question 106: What is the primary purpose of using enzymatic detergent during endoscope cleaning?

To neutralize the previous disinfectant
To break down proteins, lipids, and carbohydrates in organic soil (Correct answer)
To lubricate the insertion tube
To sterilize the endoscope channels

Correct answer: To break down proteins, lipids, and carbohydrates in organic soil

Enzymatic detergents contain proteases, lipases, and amylases that chemically break down organic soil.

Question 107: During an advanced endoscopic procedure, the use of gas insufflation carries a rare but life-threatening risk of venous air embolism. Which of the following is a classic sign of this complication?

Pinpoint pupils and muscle rigidity
Severe hypertension and bradycardia
A sudden, sustained increase in end-tidal CO2 (ETCO2)
A "mill wheel" murmur heard on cardiac auscultation (Correct answer)

Correct answer: A "mill wheel" murmur heard on cardiac auscultation

A venous air embolism occurs when gas enters the venous system and travels to the right side of the heart, creating an airlock that obstructs outflow. The churning of blood and air in the right ventricle produces a characteristic splashing or "mill wheel" murmur. Other critical signs include a sudden drop in blood pressure and a precipitous decrease (not increase) in end-tidal CO2.

Question 108: During pediatric upper endoscopy, which complication is more likely in infants compared to adults?

Bleeding from esophageal varices
Aspiration of bile
Respiratory compromise and airway obstruction due to smaller airway diameter (Correct answer)
Perforation only

Correct answer: Respiratory compromise and airway obstruction due to smaller airway diameter

Infants have proportionally smaller airways; sedation, the endoscope, and positioning can easily compromise ventilation, making respiratory monitoring critical.

Question 109: A patient in the recovery area following an EGD with polypectomy begins to complain of a new-onset, sharp, substernal chest pain that worsens with swallowing. The patient's vital signs are: BP 100/60, HR 115, RR 22, Temp 100.8°F. The nurse's immediate priority is to suspect which complication?

Myocardial infarction
Aspiration pneumonia
Post-sedation delirium
Esophageal perforation (Correct answer)

Correct answer: Esophageal perforation

The combination of chest pain, dysphagia, tachycardia, and low-grade fever following an endoscopic procedure are classic signs of an esophageal perforation. While other complications are possible, perforation is a life-threatening emergency directly related to the instrumentation of the esophagus and requires immediate recognition and intervention.

Question 110: What is the most effective pharmacologic measure to prevent post-ERCP pancreatitis?

Rectal indomethacin 100 mg (Correct answer)
IV octreotide
IV somatostatin
Sublingual nitroglycerin

Correct answer: Rectal indomethacin 100 mg

Rectal indomethacin 100 mg is the gold standard pharmacologic PEP prophylaxis.

Question 111: A gastroenterologist offers tickets to a sporting event in exchange for scheduling his patients preferentially. What ethical principle is violated?

Justice and professional integrity (anti-kickback) (Correct answer)
Beneficence
Fidelity
Autonomy

Correct answer: Justice and professional integrity (anti-kickback)

Accepting gifts for preferential treatment violates justice and professional integrity, and may violate anti-kickback regulations.

Question 112: At what age should the CGRN nurse anticipate that pediatric colonoscopy requires general anesthesia rather than conscious sedation?

Only neonates require general anesthesia
All pediatric patients regardless of age require general anesthesia
Age is not a factor; weight is the only determinant
Typically children under 12 years require general anesthesia or deep sedation (Correct answer)

Correct answer: Typically children under 12 years require general anesthesia or deep sedation

Children under 12 years typically require deep sedation or general anesthesia for colonoscopy due to inability to cooperate and higher anxiety compared to adults.

Question 113: Which step in endoscope reprocessing is considered the most critical for reducing bioburden?

Manual cleaning (brushing and enzymatic detergent) (Correct answer)
High-level disinfection
Drying with forced air
Rinsing with sterile water

Correct answer: Manual cleaning (brushing and enzymatic detergent)

Manual cleaning physically removes organic material and bioburden that can interfere with disinfection efficacy.

Question 114: What is post-polypectomy electrocoagulation syndrome?

Delayed hemorrhage from the polypectomy site
Transmural thermal injury causing peritoneal irritation without full perforation (Correct answer)
Infection at the polypectomy site
Allergic reaction to the electrosurgical pad

Correct answer: Transmural thermal injury causing peritoneal irritation without full perforation

Electrocautery causes full-thickness thermal injury producing peritoneal irritation without frank perforation.

Question 115: A patient undergoing an EGD (esophagogastroduodenoscopy) is found to have atrophic gastritis. The nurse understands that this condition primarily affects the function of which cells in the stomach lining?

Parietal cells (Correct answer)
Mucous neck cells
G-cells
Chief cells

Correct answer: Parietal cells

Atrophic gastritis involves the chronic inflammation and loss of gastric glandular cells. Parietal cells, which are responsible for secreting hydrochloric acid and intrinsic factor, are significantly affected. Their destruction leads to decreased acid production (achlorhydria) and can cause pernicious anemia due to the lack of intrinsic factor, which is necessary for vitamin B12 absorption.

Question 116: A GI nurse notices an endoscope channel is clogged during brushing. What is the appropriate action?

Skip that channel and proceed with disinfection
Force the brush through the channel
Flush with high-pressure air to dislodge debris
Remove the scope from service and report for repair (Correct answer)

Correct answer: Remove the scope from service and report for repair

A clogged channel should result in removing the scope from service for professional inspection and repair.

Question 117: An endoscope was used without completing the full reprocessing cycle. What steps should be taken?

Document and continue using the scope
Discard immediately
Reprocess and resume without notification
Remove from service, notify patient and infection control, initiate risk assessment, file incident report (Correct answer)

Correct answer: Remove from service, notify patient and infection control, initiate risk assessment, file incident report

An incompletely reprocessed endoscope requires immediate removal from service, patient notification, infection control involvement, and incident reporting.

Question 118: A patient scheduled for endoscopy has a known history of Creutzfeldt-Jakob disease (CJD). What is the recommended approach?

Use a disposable endoscope or quarantine the scope after use (Correct answer)
Autoclave the flexible endoscope at 134°C
Extended soaking in glutaraldehyde for 1 hour
Standard high-level disinfection is sufficient

Correct answer: Use a disposable endoscope or quarantine the scope after use

Prions are resistant to standard disinfection. Guidelines recommend disposable endoscopes or quarantining/destroying the scope.

Question 119: During colonoscopy, bright red blood obscures the view. What is the nurse's priority action?

Immediately withdraw the scope
Apply abdominal pressure
Increase sedation depth
Irrigate the area and assist with hemostasis while monitoring vital signs (Correct answer)

Correct answer: Irrigate the area and assist with hemostasis while monitoring vital signs

Irrigate to restore visualization, assist with hemostasis, and monitor vital signs.

Question 120: What is the onset time and peak effect of IV midazolam for endoscopic sedation?

Onset 1-2 minutes, peak 3-5 minutes (Correct answer)
Onset 10 minutes, peak 30 minutes
Onset 5 minutes, peak 15 minutes
Onset 30 seconds, peak 1 minute

Correct answer: Onset 1-2 minutes, peak 3-5 minutes

IV midazolam has onset of 1-2 minutes with peak at 3-5 minutes.

Question 121: Dumping syndrome after gastric bypass is best managed initially by which dietary intervention?

Drinking fluids with every meal
Consuming large, frequent liquid meals
Eating small, frequent meals and avoiding simple sugars (Correct answer)
Increasing fiber intake with each meal

Correct answer: Eating small, frequent meals and avoiding simple sugars

Small, frequent meals low in simple carbohydrates and separating fluids from solids reduces rapid gastric emptying that causes dumping syndrome.

Question 122: What does ERCP stand for, and what is its primary purpose?

Esophageal Reflux Clinical Pathway
Endoscopic Rectal Cancer Profiling
Emergency Rapid Care Protocol
Endoscopic Retrograde Cholangiopancreatography — diagnosis and treatment of bile/pancreatic duct disorders (Correct answer)

Correct answer: Endoscopic Retrograde Cholangiopancreatography — diagnosis and treatment of bile/pancreatic duct disorders

ERCP combines endoscopy with fluoroscopy to diagnose and treat biliary and pancreatic ductal conditions.

Question 123: A patient develops acute cholangitis after failed ERCP. What is the management priority?

Schedule elective repeat ERCP in one week
Urgent biliary drainage with IV antibiotics (Correct answer)
CT-guided gallbladder aspiration
Oral antibiotics and outpatient follow-up

Correct answer: Urgent biliary drainage with IV antibiotics

Acute cholangitis requires urgent biliary drainage combined with IV antibiotics.

Question 124: The portal vein is formed by the confluence of which two veins?

Left gastric vein and right gastric vein
Superior mesenteric vein and splenic vein (Correct answer)
Inferior mesenteric vein and hepatic vein
Hepatic vein and inferior vena cava

Correct answer: Superior mesenteric vein and splenic vein

The portal vein is formed behind the neck of the pancreas by the union of the superior mesenteric vein and the splenic vein.

Question 125: An infant with necrotizing enterocolitis (NEC) on X-ray will most likely show which finding?

Dilated stomach with no distal gas
Calcified meconium
Intraluminal air-fluid levels only
Pneumatosis intestinalis (Correct answer)

Correct answer: Pneumatosis intestinalis

Pneumatosis intestinalis — air within the bowel wall — is the pathognomonic radiographic finding of necrotizing enterocolitis.

Question 126: A patient undergoing a colonoscopy with moderate sedation using midazolam and fentanyl becomes unresponsive with a respiratory rate of 6 breaths/minute and an SpO2 of 85%. Which of the following is the most appropriate initial pharmacological intervention?

Administer flumazenil
Prepare for endotracheal intubation
Administer naloxone (Correct answer)
Increase the intravenous fluid rate

Correct answer: Administer naloxone

The patient's clinical presentation of respiratory depression (bradypnea, hypoxia, unresponsiveness) is most characteristic of opioid overdose from fentanyl. Naloxone is a competitive opioid antagonist that rapidly reverses the effects of opioids like fentanyl. While midazolam can also cause respiratory depression, its effects are typically less profound than opioids in this context. Flumazenil would reverse midazolam but not the fentanyl. Increasing fluids or preparing for intubation are not the correct initial pharmacological actions.

Question 127: During ERCP, what is the purpose of sphincterotomy?

Dilate the esophagus
Biopsy the duodenal papilla
Cut the sphincter of Oddi to allow access for stone extraction or stent placement (Correct answer)
Remove the gallbladder

Correct answer: Cut the sphincter of Oddi to allow access for stone extraction or stent placement

Sphincterotomy uses electrocautery to enlarge the papillary orifice for therapeutic interventions.

Question 128: What is the recommended storage method for reprocessed endoscopes to prevent recontamination?

Hung vertically in a ventilated cabinet with valves removed (Correct answer)
Coiled in a closed container with disinfectant
Wrapped in sterile towels in a closed drawer
Stored flat in a padded case

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

Reprocessed endoscopes should be stored vertically in a ventilated cabinet with all valves and caps removed to facilitate drying.

Question 129: A patient requests that endoscopy results not be shared with their spouse in the waiting room. What is the nurse's obligation?

Share results since they are family
Require a signed refusal form
Share only if results are normal
Respect the patient's wishes and protect confidentiality under HIPAA (Correct answer)

Correct answer: Respect the patient's wishes and protect confidentiality under HIPAA

Under HIPAA, the patient controls who receives their health information regardless of family relationship.

Question 130: According to the Spaulding classification system, which is fundamental to device reprocessing guidelines, flexible endoscopes that contact mucous membranes are classified as:

Non-critical devices requiring low-level disinfection.
Semi-critical devices requiring sterilization.
Semi-critical devices requiring, at a minimum, high-level disinfection (HLD). (Correct answer)
Critical devices requiring sterilization.

Correct answer: Semi-critical devices requiring, at a minimum, high-level disinfection (HLD).

Flexible endoscopes, such as colonoscopes and gastroscopes, contact intact mucous membranes but do not penetrate sterile body tissues. The Spaulding classification system categorizes these instruments as semi-critical. The minimum required standard of reprocessing for semi-critical devices is high-level disinfection (HLD).

Question 131: A nurse is preparing a patient for a colonoscopy who takes warfarin for atrial fibrillation. The planned procedure includes polypectomy. What is the most appropriate anticoagulation management?

Administer vitamin K the night before
Hold warfarin 5 days before the procedure (Correct answer)
Continue warfarin at current dose throughout
Switch to heparin infusion the morning of procedure

Correct answer: Hold warfarin 5 days before the procedure

For high-risk procedures such as polypectomy, warfarin should be held approximately 5 days prior to allow the INR to normalize. This is standard peri-procedural management to minimize bleeding risk while the half-life of warfarin clears.

Question 132: A patient with cirrhosis develops spontaneous bacterial peritonitis. What is the most common causative agent?

Clostridium perfringens
Staphylococcus aureus
Bacteroides fragilis
Escherichia coli (Correct answer)

Correct answer: Escherichia coli

E. coli accounts for approximately 40% of SBP cases via bacterial translocation from the gut.

Question 133: A biopsy channel brush emerges with frayed bristles. What action should be taken?

Soak in disinfectant to restore
Trim the bristles and reuse
Continue using until scheduled replacement
Discard immediately and inspect the scope channel for damage (Correct answer)

Correct answer: Discard immediately and inspect the scope channel for damage

A damaged brush must be discarded and the scope channel inspected for damage that may have caused the fraying.

Question 134: After consuming vegetables contaminated with E. coli (O157:H7), a 76-year-old woman experienced non-bloody diarrhea for 48 hours before turning bloody for four days. Which of the following conditions is the PATIENT'S HIGHEST RISK for developing?

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

Correct answer: Hemolytic uremic syndrome

The patient is at risk for developing hemolytic uremic syndrome (HUS), which can result in renal failure, after consuming (O157.H7)-contaminated vegetables and experiencing cramping in the abdomen and non-bloody diarrhea that continued for 48 hours before becoming bloody for four days. The risk of developing HUS is highest in children under five or older. Microangiopathic hemolytic anemia, thrombocytopenia, and severe renal failure are the hallmarks of HUS.

Question 135: Which hepatic condition is characterized by copper accumulation due to defective biliary copper excretion?

Hemochromatosis
Primary biliary cholangitis
Wilson's disease (Correct answer)
Gilbert syndrome

Correct answer: Wilson's disease

Wilson's disease is caused by mutations in the ATP7B gene, leading to impaired biliary excretion of copper and its accumulation in the liver, brain, and cornea.

Question 136: What is the therapeutic mechanism of endoscopic variceal band ligation?

Thermal coagulation
Chemical sclerosis
Cyanoacrylate glue injection
Mechanical strangulation with elastic bands causing thrombosis and fibrosis (Correct answer)

Correct answer: Mechanical strangulation with elastic bands causing thrombosis and fibrosis

Elastic bands mechanically strangulate varices, causing thrombosis, ischemic necrosis, and fibrosis.

Question 137: A patient receiving continuous enteral tube feeding develops diarrhea. Which intervention should the nurse consider first?

Switch to parenteral nutrition
Immediately discontinue the tube feeding
Increase the infusion rate to flush the gut
Assess for medications that may cause diarrhea, such as sorbitol-containing liquid medications (Correct answer)

Correct answer: Assess for medications that may cause diarrhea, such as sorbitol-containing liquid medications

Many liquid medications contain sorbitol as a vehicle, which is a common overlooked cause of diarrhea in tube-fed patients.

Question 138: What is the nurse's role in ensuring cultural competence during informed consent?

Defer to the social worker
Cultural considerations are not relevant
Only provide materials in English
Ensure language interpretation, respect cultural health beliefs, and verify understanding culturally appropriately (Correct answer)

Correct answer: Ensure language interpretation, respect cultural health beliefs, and verify understanding culturally appropriately

Cultural competence requires providing qualified interpretation, respecting diverse health beliefs, and verifying understanding through culturally appropriate methods.

Question 139: Which serum marker is most useful for monitoring ulcerative colitis disease activity?

CA 19-9
Alpha-fetoprotein
CEA
Fecal calprotectin (Correct answer)

Correct answer: Fecal calprotectin

Fecal calprotectin directly reflects intestinal inflammation and correlates closely with endoscopic disease activity.

Question 140: The SGNA Standards of Clinical Practice define which aspect of GI nursing?

Endoscope manufacturer guidelines
Hospital accreditation requirements
The scope, standards of practice, and professional performance expectations (Correct answer)
Salary requirements

Correct answer: The scope, standards of practice, and professional performance expectations

SGNA Standards define the scope of practice, standards of care, and professional performance expectations for GI nursing.

Question 141: When assessing a patient with a suspected colonic perforation, which physical examination finding is most indicative of peritonitis?

Visible peristaltic waves across the abdomen
Hyperactive, high-pitched bowel sounds
A rigid, board-like abdomen with rebound tenderness (Correct answer)
A soft, non-tender abdomen

Correct answer: A rigid, board-like abdomen with rebound tenderness

Colonic perforation leads to the leakage of bowel contents into the sterile peritoneal cavity, causing inflammation known as peritonitis. The classic signs of peritonitis are a rigid, board-like abdomen due to involuntary muscle guarding, severe diffuse pain, and rebound tenderness. Bowel sounds are typically diminished or absent.

Question 142: The first successful endoscopic polypectomy using a wire snare was performed in what decade?

1970s (Correct answer)
1980s
1960s
1950s

Correct answer: 1970s

In 1971, Hiromi Shinya and William Wolff performed the first successful colonoscopic polypectomy at Beth Israel Medical Center.

Question 143: Which medication is first-line therapy for primary sclerosing cholangitis (PSC) to slow bile duct fibrosis?

Prednisolone
Cholestyramine
Ursodeoxycholic acid (UDCA)
No proven disease-modifying therapy currently exists (Correct answer)

Correct answer: No proven disease-modifying therapy currently exists

Unlike PBC, PSC has no proven disease-modifying medical therapy; management focuses on symptom control, surveillance, and liver transplant evaluation for end-stage disease.

Question 144: The CGRN is overseeing the manual high-level disinfection (HLD) process. To ensure the chemical disinfectant's potency, the reprocessing technician must test the solution's minimum effective concentration (MEC). According to multi-society guidelines, how often should this MEC test be performed?

Once at the beginning of each shift.
Only when a new container of disinfectant is opened.
Prior to each endoscope immersion or at least daily, whichever is more frequent. (Correct answer)
After every five endoscopes have been processed in the solution.

Correct answer: Prior to each endoscope immersion or at least daily, whichever is more frequent.

Professional guidelines from organizations like the CDC and SGNA mandate that the Minimum Effective Concentration (MEC) of a reusable high-level disinfectant must be tested before each use (or each cycle) or at a minimum, daily. This quality control step is critical to verify that the solution's potency has not been compromised by dilution or inactivation, ensuring it remains effective.

Question 145: A patient with non-alcoholic fatty liver disease (NAFLD) is progressing to NASH with fibrosis. Which intervention has the strongest evidence for improving liver histology?

Strict carbohydrate restriction without calorie reduction
Initiation of statin therapy
Daily vitamin E supplementation alone
Sustained weight loss of ≥ 7-10% body weight (Correct answer)

Correct answer: Sustained weight loss of ≥ 7-10% body weight

Sustained weight loss of at least 7-10% body weight is the most effective intervention for reducing hepatic steatosis, inflammation, and fibrosis in NASH.

Question 146: Which of the following is a primary characteristic of propofol that makes it a popular agent for sedation in gastroenterology procedures?

It has a long duration of action, requiring less frequent dosing.
It has a rapid onset and a short recovery profile. (Correct answer)
It has a specific pharmacological reversal agent.
It possesses significant analgesic properties.

Correct answer: It has a rapid onset and a short recovery profile.

Propofol is favored in endoscopy due to its rapid onset of action (typically within a minute) and very short duration, which allows for a quick recovery and patient discharge. It has minimal analgesic (pain-relieving) effects and does not have a specific reversal agent; adverse effects are managed by supporting ventilation and circulation.

Question 147: What is the recommended surveillance interval for non-dysplastic Barrett's esophagus?

Every 6 months
Every 3-5 years (Correct answer)
Every 1 year
No surveillance needed

Correct answer: Every 3-5 years

Non-dysplastic Barrett's requires surveillance EGD every 3-5 years with systematic biopsies.

Question 148: In what year did Barry Marshall drink a Petri dish of H. pylori culture to prove it caused gastritis?

1994
2001
1975
1984 (Correct answer)

Correct answer: 1984

In 1984, Marshall drank H. pylori to prove Koch's postulates, developing gastritis and curing himself with antibiotics.

Question 149: A nurse is preparing a 7-year-old for upper endoscopy. Which age-appropriate preparation strategy is most effective?

Administer anxiolytics without explanation
Use play therapy and age-appropriate explanation of the procedure (Correct answer)
Involve parents but exclude the child from education
Withhold all information to avoid increasing anxiety

Correct answer: Use play therapy and age-appropriate explanation of the procedure

Age-appropriate preparation using play therapy and simple explanations reduces procedural anxiety and improves cooperation in school-age children.

Question 150: What ethical framework guides decisions about allocation of limited endoscopy resources?

Distributive justice — fair allocation based on clinical need, urgency, and equity (Correct answer)
Physician preference only
First come, first served only
Revenue-based prioritization

Correct answer: Distributive justice — fair allocation based on clinical need, urgency, and equity

Distributive justice requires fair allocation based on clinical need, urgency, and equitable principles.

Question 151: A CGRN is reviewing a procedure report that describes the patient's colonoscopy preparation using the Boston Bowel Preparation Scale (BBPS). The scores are: Right colon=2, Transverse colon=1, Left colon=2. How should the nurse interpret this finding?

The preparation is adequate because two of the three segments scored a 2.
The total score of 5 is considered adequate for detecting polyps greater than 10 mm.
The total score of 5 indicates an inadequate preparation, requiring a shorter interval for repeat examination. (Correct answer)
A total score of 6 is the minimum for adequacy, so the procedure should have been aborted.

Correct answer: The total score of 5 indicates an inadequate preparation, requiring a shorter interval for repeat examination.

The Boston Bowel Preparation Scale (BBPS) scores each of three colon segments from 0 (unprepared) to 3 (excellent). A score of 1 in any segment indicates that portions of the mucosa could not be seen, rendering the overall preparation inadequate. A total score of 5 or less is considered poor, which is associated with a lower polyp detection rate and necessitates a repeat colonoscopy at a shorter interval than standard guidelines would otherwise suggest.

Question 152: Which condition is most strongly associated with the development of primary sclerosing cholangitis (PSC)?

Crohn's disease with ileal involvement
Ulcerative colitis (Correct answer)
Autoimmune hepatitis
Celiac disease

Correct answer: Ulcerative colitis

Approximately 70-80% of PSC patients have concurrent ulcerative colitis, making it the strongest associated inflammatory bowel disease condition.

Question 153: A CGRN is witnessing a patient's signature on a consent form for a colonoscopy. The patient states, "I'm not really sure what a polypectomy is, but the doctor said I should just sign this." What is the CGRN's most appropriate action?

Explain the polypectomy procedure to the patient using a simple anatomical diagram.
Reassure the patient that a polypectomy is a routine and safe part of the procedure.
Document the patient's statement in the chart and proceed with pre-procedure preparations.
Notify the gastroenterologist that the patient requires further explanation before signing. (Correct answer)

Correct answer: Notify the gastroenterologist that the patient requires further explanation before signing.

The nurse's role in the informed consent process is to act as a patient advocate and witness, which includes verifying the patient's understanding. If the patient expresses confusion or a lack of understanding, it is the nurse's professional and ethical duty to pause the process and notify the physician. The physician who is performing the procedure is responsible for providing the primary explanation of the procedure, its risks, benefits, and alternatives to ensure the consent is truly informed.

Question 154: A patient presents with coffee-ground emesis and hemoglobin of 7.2 g/dL. What is the Blatchford score used for?

Determining sedation dose
Stratifying upper GI bleeding risk pre-endoscopically (Correct answer)
Classifying peptic ulcer type
Predicting variceal size

Correct answer: Stratifying upper GI bleeding risk pre-endoscopically

The Glasgow-Blatchford Score predicts the need for intervention before endoscopy is performed.

Question 155: A patient with autoimmune hepatitis is most likely to have which serologic marker?

Hepatitis B surface antigen (HBsAg)
Anti-smooth muscle antibody (ASMA) (Correct answer)
Anti-neutrophil cytoplasmic antibody (ANCA)
Anti-mitochondrial antibody (AMA)

Correct answer: Anti-smooth muscle antibody (ASMA)

Anti-smooth muscle antibody (ASMA) is the hallmark serologic marker of type 1 autoimmune hepatitis, often accompanied by elevated IgG levels.

Question 156: A patient on warfarin for atrial fibrillation is scheduled for a screening colonoscopy with possible polypectomy. When reviewing the pre-procedure labs, which result is most critical for the gastroenterology nurse to assess and report?

Platelet count of 250,000/mm³
Serum creatinine of 1.0 mg/dL
Hemoglobin of 13.5 g/dL
International Normalized Ratio (INR) of 2.8 (Correct answer)

Correct answer: International Normalized Ratio (INR) of 2.8

The International Normalized Ratio (INR) measures the anticoagulant effect of warfarin. For a high-risk procedure like polypectomy, the INR must be within an acceptable range (typically <1.5) to minimize bleeding risk. An INR of 2.8 is therapeutic for atrial fibrillation but is too high for the procedure, indicating a significant bleeding risk that must be communicated to the provider.

Question 157: A patient is being prepared for an EGD. The nurse confirms that informed consent has been obtained. Which element is essential for the consent to be considered valid?

The patient's signature was witnessed by two healthcare providers.
The consent form was signed the day before the procedure.
A family member co-signed the consent form.
The patient was able to explain the procedure and its risks in their own words. (Correct answer)

Correct answer: The patient was able to explain the procedure and its risks in their own words.

Valid informed consent requires that the patient demonstrates an understanding of the procedure, its benefits, potential risks, and available alternatives. Having the patient verbalize this understanding is a key method for the nurse to verify comprehension. The number of witnesses, timing of the signature (as long as it's before the procedure and sedation), and family co-signatures (unless the patient is incapacitated) are not the primary determinants of valid consent.

Question 158: A CGRN is preparing reusable biopsy forceps for the next procedure. According to the Spaulding classification system, what is the required level of reprocessing for this accessory?

High-level disinfection (HLD)
Sterilization (Correct answer)
Low-level disinfection
Manual cleaning with an enzymatic detergent

Correct answer: Sterilization

The Spaulding classification categorizes medical devices based on infection risk. Biopsy forceps are considered 'critical' items because they break the mucosal barrier and enter sterile tissue. Critical items require sterilization, which is the complete destruction of all microbial life, including bacterial spores.

Question 159: During sedation monitoring, the capnography waveform becomes flat. What does this indicate?

Apnea — the patient has stopped breathing (Correct answer)
Equipment malfunction only
Hyperventilation
Normal breathing

Correct answer: Apnea — the patient has stopped breathing

A flat capnography waveform indicates apnea requiring immediate intervention.

Question 160: Which of the following should be done if a patient who is scheduled for a colonoscopy has a nose stud and an enclosed lip ring?

Leave both in place
Remove the lip ring and tape the nose stud securely
Remove the nose stud but leave the lip ring in place
Remove both prior to the procedure (Correct answer)

Correct answer: Remove both prior to the procedure

A nose stud and enclosing lip ring should be taken out of a patient who has a colonoscopy before the procedure because they increase the risk of trauma and aspiration if they get dislodged. Nose studs are removed by gently pressing down while pushing outward. Enclosed lip rings can be removed by applying pressure within the call to drive the ends apart. A bead on the back of jewelry of the barbell style unscrews counterclockwise.

Question 161: A nurse is preparing a patient for endoscopic ultrasound (EUS)-guided drainage of a pancreatic pseudocyst. Which nursing assessment is most important pre-procedure?

Assess bowel sounds and last bowel movement
Confirm patient has stopped all vitamins for 48 hours
Verify NPO status and review coagulation parameters including INR and platelet count (Correct answer)
Check hepatitis B surface antigen results

Correct answer: Verify NPO status and review coagulation parameters including INR and platelet count

EUS-guided drainage is an invasive procedure requiring adequate NPO status to minimize aspiration risk and normal coagulation to prevent bleeding complications.

Question 162: What is the rule of three as it applies to esophageal dilation?

Maximum three dilation sessions per year
No more than three sequential dilator sizes after encountering resistance (Correct answer)
Three minutes between each pass
Three different dilator types should be used

Correct answer: No more than three sequential dilator sizes after encountering resistance

After resistance is first felt, no more than three consecutive dilator sizes should be passed to minimize perforation risk.

Question 163: A patient with celiac disease must strictly avoid which protein?

Gluten (Correct answer)
Albumin
Casein
Lactalbumin

Correct answer: Gluten

Gluten, found in wheat, barley, and rye, triggers the autoimmune response that damages intestinal villi in celiac disease.

Question 164: What is the purpose of performing a leak test on an endoscope before reprocessing?

To measure residual bioburden
To verify the disinfectant concentration
To confirm the AER is functioning properly
To detect damage to the endoscope's internal channels and outer sheath (Correct answer)

Correct answer: To detect damage to the endoscope's internal channels and outer sheath

Leak testing detects holes or cracks that could allow fluid infiltration and damage internal components or harbor microorganisms.

Question 165: The vast surface area of the small intestine, critical for nutrient absorption, is primarily achieved through which combination of anatomical features?

Haustra, taeniae coli, and omental appendices
The greater omentum, lesser omentum, and mesentery
Plicae circulares, villi, and microvilli (Correct answer)
Rugae, gastric pits, and a thick mucus layer

Correct answer: Plicae circulares, villi, and microvilli

The remarkable absorptive surface area of the small intestine is created by three levels of folding. The plicae circulares (circular folds) are large, visible folds of the mucosa and submucosa. The villi are finger-like projections of the mucosa, and the microvilli (forming the brush border) are microscopic projections on the surface of the individual absorptive cells. Together, these structures increase the surface area by about 600-fold.

Question 166: A new GI technician has just finished assisting with an EGD. What is the most critical initial step they must perform in the procedure room to begin the reprocessing cycle and prevent biofilm formation?

Immerse the scope fully in a basin of high-level disinfectant.
Wipe the insertion tube and flush/suction all channels with an enzymatic detergent solution. (Correct answer)
Transport the scope in a covered container to the automated endoscope reprocessor (AER).
Perform a preliminary dry leak test on the endoscope.

Correct answer: Wipe the insertion tube and flush/suction all channels with an enzymatic detergent solution.

Bedside pre-cleaning is the crucial first step to remove gross organic debris and prevent the drying of bioburden, which can lead to biofilm formation. This step, which includes wiping the exterior and flushing/suctioning the channels with a detergent, must be performed immediately after the procedure and before the scope is transported to the reprocessing area.

Question 167: Which complication is most associated with prolonged use of proton pump inhibitors (PPIs)?

Iron overload
Hypercalcemia
Hyperkalemia
Clostridium difficile infection (Correct answer)

Correct answer: Clostridium difficile infection

Long-term PPI use is associated with an increased risk of Clostridium difficile infection due to the reduction of gastric acid, which normally serves as a barrier to colonization. Other associations include hypomagnesemia and vitamin B12 deficiency, but C. diff is a well-documented infectious complication.

Question 168: A patient with primary sclerosing cholangitis undergoes ERCP. What associated condition should the team know about?

Ulcerative colitis (Correct answer)
Rheumatoid arthritis
Type 1 diabetes
Chronic kidney disease

Correct answer: Ulcerative colitis

PSC is strongly associated with ulcerative colitis, occurring in 70-80% of PSC patients.

Question 169: A nurse is asked to perform a task outside the state nurse practice act. What should the nurse do?

Decline, citing scope limitations, and notify the supervisor (Correct answer)
Perform it if the physician ordered it
Perform it but document a protest
Ask another nurse to do it

Correct answer: Decline, citing scope limitations, and notify the supervisor

Nurses must practice within their state nurse practice act. A physician's order does not expand nursing scope.

Question 170: A patient presents for endoscopy with an insulin pump. How should it be managed?

Switch to an insulin drip
Remove the pump and hold all insulin
Continue at the current basal rate and monitor blood glucose (Correct answer)
Double the basal rate for NPO stress response

Correct answer: Continue at the current basal rate and monitor blood glucose

Insulin pumps should continue at the current or slightly reduced basal rate with frequent glucose monitoring.

Question 171: What is the primary function of the sphincter of Oddi?

Regulate the flow of bile and pancreatic juice into the duodenum (Correct answer)
Prevent reflux from the colon to the ileum
Separate the esophagus from the stomach
Control gastric emptying into the duodenum

Correct answer: Regulate the flow of bile and pancreatic juice into the duodenum

The sphincter of Oddi regulates the flow of bile and pancreatic secretions into the duodenum through the ampulla of Vater.

Question 172: What is the recommended reversal agent for midazolam oversedation during endoscopy?

Flumazenil (Correct answer)
Naloxone
Atropine
Epinephrine

Correct answer: Flumazenil

Flumazenil is the specific benzodiazepine antagonist for midazolam-induced oversedation.

Question 173: What is the recommended method for handling biopsy specimens during endoscopy?

Place all in a single container
The nurse does not handle specimens
Air-dry before placing in transport media
Separate labeled containers with formalin for each site, with accurate location documentation (Correct answer)

Correct answer: Separate labeled containers with formalin for each site, with accurate location documentation

Each biopsy site requires a separate, labeled container with appropriate fixative and accurate anatomic documentation.

Question 174: Which organ produces approximately 1-1.5 liters of bile per day?

Pancreas
Liver (Correct answer)
Small intestine
Gallbladder

Correct answer: Liver

The liver produces 500-1,500 mL of bile daily. The gallbladder only stores and concentrates bile.

Question 175: During a colonoscopy, the nurse notices the patient's oxygen saturation drops to 88% and the patient becomes difficult to arouse. What is the priority nursing intervention?

Increase the flow of CO2 insufflation
Stop the procedure, stimulate the patient, and apply supplemental oxygen (Correct answer)
Administer naloxone and continue the procedure
Administer flumazenil immediately

Correct answer: Stop the procedure, stimulate the patient, and apply supplemental oxygen

The priority intervention for hypoxia and decreased level of consciousness during endoscopy is to stop the procedure, stimulate the patient, and provide supplemental oxygen. Reversal agents such as flumazenil or naloxone may be considered if sedation-induced respiratory depression is confirmed, but airway support and oxygenation come first.

Question 176: The landmark 1932 paper first describing regional ileitis — now called Crohn's disease — was authored by how many physicians?

Four
One
Two
Three (Correct answer)

Correct answer: Three

The 1932 JAMA paper was co-authored by three physicians: Burrill Crohn, Leon Ginzburg, and Gordon Oppenheimer. The disease was named after Crohn because his name appeared first alphabetically.

CGRN Certification Exam

The CGRN (Certified Gastroenterology Registered Nurse) exam, administered by ABCGN, validates the specialized knowledge of nurses providing care to patients with gastroenterological conditions and undergoing GI procedures.

175

Questions

240 min

Time Limit

65%

To Pass

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