Certified Gastroenterology Registered Nurse (CGRN) — Questions and Answers

Question 1: Which patient statement indicates correct understanding of proton pump inhibitor (PPI) therapy for GERD?

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

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

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

Question 2: Cholecystokinin (CCK) stimulates which response after a fatty meal?

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

Correct answer: Gallbladder contraction and pancreatic enzyme release

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

Question 3: What is the correct sequence for removing contaminated personal protective equipment?

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

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

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

Question 4: During leak testing, bubbles emerge continuously from the distal bending section of an endoscope. What should the technician do?

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

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

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

Question 5: During PEG tube placement, the patient's abdomen becomes rigid and the transillumination point is lost. What should the team suspect?

Expected post-placement ileus
Normal gastric insufflation
Malposition with possible injury to an interposed organ or peritoneal leakage (Correct answer)
Simple wound-site bleeding

Correct answer: Malposition with possible injury to an interposed organ or peritoneal leakage

Loss of transillumination and a rigid abdomen suggest the tract is misplaced or another organ, such as the colon, is interposed.

Question 6: Which type of fiber is most effective for managing diarrhea in GI patients?

Insoluble fiber
Bran
Soluble fiber (Correct answer)
Cellulose

Correct answer: Soluble fiber

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

Question 7: An endoscope is tested with an adenosine triphosphate (ATP) bioluminescence assay after manual cleaning but before high-level disinfection. The result is a 'FAIL,' indicating a high level of residual organic material. What is the priority action for the reprocessing technician?

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

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

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

Question 8: Which condition involves transmural inflammation with skip lesions anywhere from mouth to anus?

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

Correct answer: Crohn's disease

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

Question 9: During ERCP, the patient develops severe epigastric pain radiating to the back before leaving the procedure room. Which lab values should the nurse anticipate the provider ordering to evaluate the most common ERCP complication?

Serum amylase and lipase (Correct answer)
Ammonia and AFP
Troponin and CK-MB
TSH and free T4

Correct answer: Serum amylase and lipase

Post-ERCP pancreatitis is the most common ERCP complication and is assessed with amylase and lipase.

Question 10: A nurse should hold pancrelipase and notify the provider if the patient reports taking the capsules in which way?

Crushing and chewing the enteric-coated beads (Correct answer)
Swallowing them whole with water
Taking them with applesauce
Taking them with every meal and snack

Correct answer: Crushing and chewing the enteric-coated beads

Crushing or chewing destroys the enteric coating, inactivating enzymes in gastric acid and irritating oral mucosa.

Question 11: A patient with chronic hepatitis B on entecavir must be counseled about which risk if the drug is abruptly discontinued?

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

Correct answer: Severe hepatitis flare

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

Question 12: A patient develops sudden bradycardia (HR 38) and hypotension during colonoscope insertion through the sigmoid colon. What is the most likely cause?

Hypoglycemia
Anaphylaxis to lubricant
Vasovagal response to bowel stretching (Correct answer)
Air embolism

Correct answer: Vasovagal response to bowel stretching

Mesenteric stretching during scope advancement commonly triggers a vagal response with bradycardia and hypotension.

Question 13: A patient becomes agitated with a heart rate of 130 and rigidity after receiving sedation, and the endoscopy suite thermometer shows a rapidly rising temperature. Which emergency medication should be ready?

Naloxone
Atropine
Dantrolene (Correct answer)
Protamine sulfate

Correct answer: Dantrolene

Rapid temperature rise with rigidity suggests malignant hyperthermia, treated with dantrolene.

Question 14: How should reprocessed endoscopes be stored to maintain their clean status?

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

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

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

Question 15: Which finding during a routine screening colonoscopy carries the highest risk of progression to colorectal cancer?

A 15 mm sessile serrated lesion with dysplasia (Correct answer)
Scattered diverticula in the sigmoid colon
A 4 mm hyperplastic polyp in the rectum
Small internal hemorrhoids

Correct answer: A 15 mm sessile serrated lesion with dysplasia

Large sessile serrated lesions with dysplasia are advanced precancerous lesions with significant malignant potential.

Question 16: Where does the majority of nutrient absorption occur in the GI tract?

Stomach
Small intestine (Correct answer)
Sigmoid colon
Cecum

Correct answer: Small intestine

The small intestine, with its villi and microvilli, is the primary site of nutrient absorption.

Question 17: A patient recovering from a colonoscopy with polypectomy reports severe abdominal pain, distension, and a fever of 101.2°F. What should the gastroenterology nurse suspect first?

Food intolerance
Urinary tract infection
Bowel perforation (Correct answer)
Normal post-procedure gas pain

Correct answer: Bowel perforation

Severe pain, distension, and fever after polypectomy are classic warning signs of bowel perforation, a surgical emergency.

Question 18: Hepatic encephalopathy is largely attributed to the accumulation of which substance?

Glucose
Ammonia (Correct answer)
Bilirubin
Sodium

Correct answer: Ammonia

A failing liver cannot convert ammonia to urea, and elevated ammonia crosses into the brain.

Question 19: A biofilm on an endoscope channel is best described as what?

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

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

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

Question 20: Diverticulitis is inflammation of outpouchings most commonly located in which structure?

Duodenum
Sigmoid colon (Correct answer)
Stomach
Terminal ileum

Correct answer: Sigmoid colon

Diverticula and diverticulitis occur most often in the sigmoid colon.

Question 21: During moderate sedation, capnography monitoring is valuable primarily because it detects which problem earliest?

Hypotension
Cardiac ischemia
Hypoventilation and apnea (Correct answer)
Fluid overload

Correct answer: Hypoventilation and apnea

End-tidal CO2 changes reveal hypoventilation or apnea before pulse oximetry shows desaturation.

Question 22: A patient with a permanent pacemaker is scheduled for snare polypectomy. Which electrosurgical precaution is most appropriate?

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

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

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

Question 23: A patient scheduled for colonoscopy reports taking clopidogrel daily after cardiac stent placement 2 months ago. What is the gastroenterology nurse's best action?

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

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

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

Question 24: A GI nurse sustains a needlestick injury from a used needle. What is the immediate first action?

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

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

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

Question 25: Which finding most reliably indicates hemodynamic instability in a patient with suspected GI bleeding?

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

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

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

Question 26: Which patient statement indicates a need for further teaching before endoscopic ultrasound (EUS) with fine-needle aspiration?

"I will need someone to drive me home"
"I will have nothing by mouth before the test"
"I can keep taking my warfarin since no cutting is involved" (Correct answer)
"A needle may sample tissue through the scope"

Correct answer: "I can keep taking my warfarin since no cutting is involved"

FNA carries bleeding risk, so anticoagulants like warfarin generally must be held per provider instructions before the procedure.

Question 27: Manual cleaning of an endoscope must be completed within what timeframe to be most effective?

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

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

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

Question 28: Which baseline test is required before starting a patient on infliximab?

Echocardiogram in all patients
Tuberculosis screening (Correct answer)
Pulmonary function tests
Colonoscopy within 1 week

Correct answer: Tuberculosis screening

Anti-TNF therapy can reactivate latent tuberculosis, so TB screening is mandatory before initiation.

Question 29: Which diet is most appropriate for a patient with newly diagnosed Celiac disease?

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

Correct answer: Gluten-free diet

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

Question 30: A patient with esophageal varices is prescribed octreotide. What is the primary purpose of this medication?

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

Correct answer: Reduce portal venous pressure

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

Question 31: A GI unit implements a new endoscope tracking system to improve patient safety. This is an example of which type of quality improvement approach?

Process improvement through technology integration (Correct answer)
Corrective action plan
Sentinel event review
Retrospective chart audit

Correct answer: Process improvement through technology integration

Implementing a tracking system is a proactive process improvement strategy that uses technology to prevent errors and enhance patient safety in the GI setting.

Question 32: Which assessment finding in a patient with a new ileostomy requires immediate provider notification?

A dusky, purple-tinged stoma (Correct answer)
Liquid effluent in the pouch
Mild peristomal skin redness
Stoma protruding about 2 cm

Correct answer: A dusky, purple-tinged stoma

A dusky or purple stoma indicates compromised blood supply and possible necrosis, which is a surgical emergency.

Question 33: Following an EGD with topical throat anesthetic, when may the patient safely resume oral intake?

After the gag reflex returns (Correct answer)
Only after passing flatus
After 24 hours NPO
Immediately upon waking

Correct answer: After the gag reflex returns

Oral intake must wait until the gag reflex returns to prevent aspiration.

Question 34: Before an EGD with moderate sedation, which patient statement requires the nurse to notify the provider?

"I took my blood pressure pill with a sip of water"
"I ate a full breakfast an hour ago" (Correct answer)
"I had a glass of water 2 hours ago"
"I stopped my fish oil last week"

Correct answer: "I ate a full breakfast an hour ago"

A recent full meal violates fasting guidelines and creates a significant aspiration risk during sedation.

Question 35: A patient with active GI bleeding is anticoagulated with warfarin and has an INR of 4.8. The most appropriate reversal strategy is:

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

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

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

Question 36: Following ERCP, which symptom combination should prompt evaluation for post-ERCP pancreatitis?

New epigastric pain radiating to the back with elevated lipase (Correct answer)
Itching at the IV site
Single episode of belching
Mild sore throat and hoarseness

Correct answer: New epigastric pain radiating to the back with elevated lipase

Post-ERCP pancreatitis presents with typical pancreatic pain and lipase elevation, usually within hours of the procedure.

Question 37: A patient is admitted to the hospital with an acute, uncomplicated episode of diverticulitis. Which of the following initial orders should the nurse anticipate?

High-fiber diet and increased fluid intake.
Administration of a stimulant laxative to prevent constipation.
Bowel rest (NPO or clear liquids) and intravenous antibiotics. (Correct answer)
Immediate preparation for a screening colonoscopy.

Correct answer: Bowel rest (NPO or clear liquids) and intravenous antibiotics.

The initial management of acute, uncomplicated diverticulitis involves resting the colon to reduce inflammation and treating the infection. This is achieved through bowel rest (NPO or clear liquids), intravenous fluids for hydration, and intravenous antibiotics. A high-fiber diet is recommended for prevention of future episodes (diverticulosis), not during an acute flare. Laxatives and colonoscopy are contraindicated in the acute phase due to the risk of increasing intraluminal pressure and perforation.

Question 38: Which drug interaction is most concerning for a patient taking omeprazole with clopidogrel?

Severe hypoglycemia
Reduced antiplatelet effect via CYP2C19 inhibition (Correct answer)
Increased risk of QT prolongation
Enhanced clopidogrel absorption causing bleeding

Correct answer: Reduced antiplatelet effect via CYP2C19 inhibition

Omeprazole inhibits CYP2C19, which is required to convert clopidogrel into its active antiplatelet metabolite.

Question 39: Which laboratory value is the best indicator of a patient's long-term nutritional status?

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

Correct answer: Serum albumin

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

Question 40: A nurse is administering lactulose to a patient with hepatic encephalopathy. What is the primary therapeutic goal of this medication in this specific condition?

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

Correct answer: To reduce serum ammonia levels

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

Question 41: A patient returns from colonoscopy with polypectomy and reports increasing abdominal pain, fever, and tachycardia 12 hours later without rebound tenderness or free air on imaging. What should the nurse suspect?

Irritable bowel exacerbation
Post-polypectomy electrocoagulation syndrome (Correct answer)
Routine gas distension
Splenic rupture

Correct answer: Post-polypectomy electrocoagulation syndrome

Transmural burn from cautery can cause localized peritoneal irritation with fever and pain without frank perforation.

Question 42: Which assessment finding suggests peritonitis in a patient with diverticulitis?

Soft abdomen with mild left lower quadrant tenderness
Rigid, board-like abdomen with rebound tenderness (Correct answer)
Increased appetite and flatulence
Hyperactive bowel sounds in all quadrants

Correct answer: Rigid, board-like abdomen with rebound tenderness

Abdominal rigidity and rebound tenderness indicate peritoneal inflammation from possible perforation.

Question 43: When providing education to a patient about using a large-volume polyethylene glycol (PEG) solution for colonoscopy preparation, which of the following instructions is most appropriate?

Mix the powder with a dark-colored soda or sports drink to improve the flavor.
You must drink only the prep solution; no other clear liquids are permitted during this time.
Chilling the solution and drinking it through a straw may improve tolerance and reduce nausea. (Correct answer)
Drink the entire solution as quickly as possible, ideally within one hour, to ensure the best result.

Correct answer: Chilling the solution and drinking it through a straw may improve tolerance and reduce nausea.

Many patients find the large volume of PEG solutions difficult to tolerate due to taste and volume, which can cause nausea and vomiting. Standard evidence-based tips to improve palatability and tolerance include chilling the solution and using a straw to bypass some taste buds. Dark-colored liquids are contraindicated as they can stain the colon, and drinking the solution too quickly can cause severe cramping and vomiting. Patients are encouraged to drink other approved clear liquids to stay hydrated.

Question 44: When educating a patient who has recovered from an NSAID-induced GI bleed, which discharge instruction is most important?

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

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

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

Question 45: A patient with pancreatitis who is transitioning from NPO status should begin with which diet?

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

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

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

Question 46: A patient presents with hematemesis and coffee-ground emesis. These findings are most consistent with bleeding that originates:

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

Correct answer: Proximal to the ligament of Treitz

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

Question 47: Lactulose is prescribed for a patient with hepatic encephalopathy. The nurse knows the therapeutic goal is which outcome?

One formed stool per week
Complete cessation of bowel movements
Watery diarrhea 10 times daily
Two to three soft stools daily with improved mentation (Correct answer)

Correct answer: Two to three soft stools daily with improved mentation

Lactulose is titrated to 2-3 soft stools per day to trap and excrete ammonia without causing dehydration.

Question 48: After high-level disinfection, why are endoscope channels flushed with alcohol and dried with forced air?

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

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

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

Question 49: Which of the following is a primary indication for emergency surgical intervention in a patient with upper GI bleeding?

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

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

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

Question 50: Which post-procedure instruction is correct for a patient after band ligation of esophageal varices?

Resume a regular diet including toast immediately
Take aspirin for throat discomfort
Follow the ordered diet progression and report vomiting blood or black stools at once (Correct answer)
Perform vigorous exercise to aid healing

Correct answer: Follow the ordered diet progression and report vomiting blood or black stools at once

Post-banding patients need gradual diet advancement and must report signs of rebleeding immediately.

Question 51: What surveillance practice helps detect endoscope reprocessing failures early?

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

Correct answer: Periodic microbiological culturing of endoscope channels

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

Question 52: When using a 0.55% ortho-phthalaldehyde (OPA) solution for manual high-level disinfection of a flexible endoscope, which parameters are most commonly cited in manufacturer and professional guidelines for efficacy in the United States?

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

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

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

Question 53: A patient reports dysphagia to solids that has progressed to liquids over 3 months, with a 15-pound weight loss. The nurse recognizes this pattern is most concerning for which condition?

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

Correct answer: Esophageal malignancy

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

Question 54: A GI nurse observes that a patient's nasogastric aspirate has changed from bloody to bilious/clear. This most appropriately indicates:

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

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

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

Question 55: Which electrolyte imbalance is most commonly associated with prolonged diarrhea in GI patients?

Hypernatremia
Hypercalcemia
Hyperkalemia
Hypokalemia (Correct answer)

Correct answer: Hypokalemia

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

Question 56: GERD results primarily from dysfunction of which structure?

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

Correct answer: Lower esophageal sphincter

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

Question 57: A patient with GERD has failed lifestyle changes and once-daily PPI therapy. Before escalating therapy, which nursing assessment is most important?

Checking whether the patient drinks milk at bedtime
Asking if the patient chews gum after meals
Confirming the patient sleeps flat without pillows
Verifying the PPI is taken 30-60 minutes before the first meal (Correct answer)

Correct answer: Verifying the PPI is taken 30-60 minutes before the first meal

PPIs work on actively secreting proton pumps, so incorrect timing relative to meals is the most common cause of apparent treatment failure.

Question 58: A nurse is providing discharge instructions to a patient who underwent a colonoscopy with polypectomy. Which symptoms should the nurse instruct the patient to report immediately as potential signs of a post-procedure infection or perforation?

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

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

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

Question 59: Which statement about colorectal cancer screening for average-risk adults in the United States is correct?

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

Correct answer: Screening should begin at age 45

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

Question 60: Which type of feeding is preferred in a critically ill patient with a functioning GI tract?

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

Correct answer: Enteral nutrition

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

Question 61: A patient with hemochromatosis-related liver disease will most likely be managed with which therapy?

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

Correct answer: Scheduled therapeutic phlebotomy

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

Question 62: A patient develops hives, wheezing, and hypotension minutes after receiving pre-procedure IV antibiotics. What is the nurse's priority action?

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

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

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

Question 63: A patient with liver cirrhosis presents with acute variceal hemorrhage. Which vasoactive medication is most commonly administered as a continuous infusion to reduce portal pressure?

Neostigmine
Octreotide (Correct answer)
Metoclopramide
Pantoprazole

Correct answer: Octreotide

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

Question 64: Standard Precautions in the GI lab are based on which principle?

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

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

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

Question 65: A patient taking sulfasalazine for inflammatory bowel disease should be advised to supplement which nutrient?

Vitamin A
Vitamin K
Zinc
Folic acid (Correct answer)

Correct answer: Folic acid

Sulfasalazine impairs folate absorption, so folic acid supplementation is recommended.

Question 66: A patient receiving a PEG tube feeding suddenly develops coughing, dyspnea, and crackles. What is the nurse's priority action?

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

Correct answer: Stop the feeding and assess for aspiration

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

Question 67: What is the primary purpose of a low-residue diet for a patient preparing for a colonoscopy?

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

Correct answer: Minimize stool production for better visualization

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

Question 68: During polypectomy, immediate arterial spurting is noted at the resection site. Which intervention is typically attempted first?

Immediate blood transfusion
Endoscopic hemoclip or coagulation at the bleeding site (Correct answer)
Emergency laparotomy
Systemic IV vasopressin

Correct answer: Endoscopic hemoclip or coagulation at the bleeding site

Immediate post-polypectomy bleeding is usually controlled endoscopically with clips, coagulation, or epinephrine injection.

Question 69: A patient with suspected C. difficile infection is admitted. Which infection control measure is essential?

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

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

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

Question 70: A patient with Crohn's disease is experiencing an acute flare. Which nutritional intervention is most appropriate?

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

Correct answer: Enteral nutrition via nasogastric tube

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

Question 71: Celiac disease causes malabsorption due to damage of what structure?

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

Correct answer: Small intestinal villi

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

Question 72: Argon Plasma Coagulation (APC) is a non-contact thermal modality used for hemostasis in the GI tract. What is the primary mechanism of action for APC?

It injects a sclerosing agent to harden the vessel walls.
It deploys a mechanical clip to ligate the bleeding vessel.
It delivers a high-frequency electrical current to tissue via ionized argon gas. (Correct answer)
It uses a focused laser beam to vaporize superficial tissue.

Correct answer: It delivers a high-frequency electrical current to tissue via ionized argon gas.

APC works by directing a jet of argon gas toward the target tissue. A high-frequency electrical current then ionizes the gas, creating a plasma that conducts the current to the tissue without direct contact. [16, 25] This results in superficial coagulation and is effective for controlling bleeding from various lesions. [22, 25]

Question 73: The appendix projects from which part of the GI tract?

Ascending colon at the cecum (Correct answer)
Jejunum
Duodenum
Sigmoid colon

Correct answer: Ascending colon at the cecum

The appendix is a blind pouch attached to the cecum at the start of the ascending colon.

Question 74: A GI nurse is educating a patient with lactose intolerance. Which food would be most appropriate to recommend?

Hard aged cheese (Correct answer)
Cream soup
Soft-serve ice cream
Whole milk

Correct answer: Hard aged cheese

Hard aged cheeses like cheddar contain very little lactose due to the fermentation process, making them generally well tolerated by patients with lactose intolerance.

Question 75: When preparing a patient for an endoscopic procedure with moderate sedation, which of the following is the MOST critical component of the pre-procedure nursing assessment?

Reviewing the patient's last meal and fluid intake
Confirming the patient's insurance information
Evaluating the patient’s history for snoring, stridor, or diagnosed sleep apnea (Correct answer)
Assessing the patient's past surgical history for any abdominal surgeries

Correct answer: Evaluating the patient’s history for snoring, stridor, or diagnosed sleep apnea

Assessing for a history of snoring, stridor, or sleep apnea is critical as these conditions significantly increase the risk of airway compromise and respiratory depression during sedation. While NPO status and past surgical history are important, a compromised airway presents the most immediate life-threatening risk during the procedure.

Question 76: Why is a leak test performed during endoscope reprocessing?

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

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

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

Question 77: A patient with short bowel syndrome after extensive ileal resection is at greatest risk for deficiency of which nutrient?

Iron
Vitamin B12 (Correct answer)
Vitamin C
Folate

Correct answer: Vitamin B12

Vitamin B12 is absorbed exclusively in the terminal ileum, so its resection mandates lifelong supplementation.

Question 78: What is the primary purpose of an Automated Endoscope Reprocessor (AER)?

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

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

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

Question 79: A patient with liver cirrhosis and ascites should be placed on which dietary restriction?

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

Correct answer: Low-sodium diet

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

Question 80: Angiographic embolization is most commonly used in GI bleeding management when:

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

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

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

Question 81: Which cells of the gastric mucosa secrete hydrochloric acid?

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

Correct answer: Parietal cells

Parietal cells secrete HCl and intrinsic factor.

Question 82: Which IV access is most appropriate for the initial resuscitation of a patient with active GI bleeding?

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

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

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

Question 83: What is the primary purpose of high-level disinfection of GI endoscopes?

Reduce cost
Improve image quality
Eliminate all microorganisms except high spore counts (Correct answer)
Sterilize permanently

Correct answer: Eliminate all microorganisms except high spore counts

High-level disinfection kills all microorganisms except large numbers of bacterial spores.

Question 84: Which organ has both endocrine and exocrine digestive functions?

Pancreas (Correct answer)
Spleen
Liver
Gallbladder

Correct answer: Pancreas

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

Question 85: A patient preparing for a capsule endoscopy asks what to expect. Which teaching point is correct?

You will be under general anesthesia for the entire study
You cannot eat or drink anything for 24 hours after swallowing the capsule
You will swallow a pill-sized camera that transmits images as it passes through the small bowel (Correct answer)
The capsule must be retrieved from stool and returned to the lab

Correct answer: You will swallow a pill-sized camera that transmits images as it passes through the small bowel

Capsule endoscopy uses a swallowed wireless camera to image the small intestine, and the disposable capsule passes naturally.

Question 86: During an EGD, the nurse notes the patient's heart rate drop from 78 to 42 beats/min as the scope is advanced. What is the most likely cause?

Malignant hyperthermia
Hyperthyroid crisis
Vasovagal response to esophageal stimulation (Correct answer)
Fentanyl allergy

Correct answer: Vasovagal response to esophageal stimulation

Scope passage can trigger a vagal response causing bradycardia, requiring close monitoring and possible atropine.

Question 87: Infliximab, a biologic response modifier, will be used as the first step in treating a patient with Crohn's disease. Which of the following tests should be performed on the patient before starting treatment?

Diabetes and hepatitis C
Anemia
Hepatitis A and B
TB and hepatitis B (Correct answer)

Correct answer: TB and hepatitis B

Infliximab, a TNF-alpha inhibitor, suppresses the immune system, significantly increasing the risk of reactivating latent infections like tuberculosis (TB) and hepatitis B. Therefore, it is crucial to screen patients for these infections before initiating treatment with infliximab. Positive results would require appropriate treatment or prophylaxis to prevent severe complications.

Question 88: The nurse assesses a patient 2 hours after a colonoscopy with polypectomy. Which finding requires immediate provider notification?

Passage of a small amount of flatus
Severe abdominal pain with a rigid, distended abdomen (Correct answer)
Drowsiness that improves with stimulation
Mild abdominal cramping relieved by walking

Correct answer: Severe abdominal pain with a rigid, distended abdomen

Severe pain with rigidity and distention suggests bowel perforation, a post-polypectomy emergency.

Question 89: What function does the small intestine have?

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

Correct answer: Absorb nutrients

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

Question 90: Which enzyme, secreted as pepsinogen, initiates protein digestion in the stomach?

Trypsin
Amylase
Lipase
Pepsin (Correct answer)

Correct answer: Pepsin

Pepsinogen is converted to pepsin by acid and begins protein digestion.

Question 91: Which finding after esophageal dilation requires immediate notification of the provider?

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

Correct answer: Subcutaneous crepitus in the neck

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

Question 92: A patient with inflammatory bowel disease (IBD) is most likely to require supplementation with which mineral due to chronic diarrhea?

Iron (Correct answer)
Selenium
Calcium
Zinc

Correct answer: Iron

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

Question 93: Which staff protection is required by law and reduces occupational risk of hepatitis B in GI nurses?

Annual chest X-rays
Employer-provided hepatitis B vaccination series (Correct answer)
Daily antibiotic prophylaxis
Mandatory quarterly blood transfusions

Correct answer: Employer-provided hepatitis B vaccination series

OSHA requires employers to offer the hepatitis B vaccine to at-risk healthcare workers at no cost.

Question 94: Which nutritional supplement is recommended for patients with hepatic encephalopathy to help manage ammonia levels?

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

Correct answer: Branched-chain amino acids (BCAAs)

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

Question 95: Which statement about omega-3 fatty acid supplementation is most accurate for patients with inflammatory bowel disease?

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

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

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

Question 96: If reprocessing documentation for a specific scope is incomplete, what is the appropriate action before patient use?

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

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

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

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

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

Correct answer: Chest pain with fever or difficulty breathing

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

Question 98: According to the Spaulding classification system, flexible GI endoscopes that contact intact mucous membranes are categorized as which type of device, and what is the minimum required level of reprocessing?

Critical; Sterilization
Semi-critical; High-level disinfection (Correct answer)
Non-critical; Low-level disinfection
Semi-critical; Sterilization

Correct answer: Semi-critical; High-level disinfection

The Spaulding classification system categorizes medical devices based on the risk of infection. Flexible endoscopes contact mucous membranes but do not typically breach sterile tissue, classifying them as semi-critical devices. The minimum standard of reprocessing for semi-critical devices is high-level disinfection (HLD), which eliminates all vegetative microorganisms, mycobacteria, and viruses, but not necessarily high numbers of bacterial spores.

Question 99: A patient on high-dose loperamide abuse is at risk for which cardiac complication?

QT prolongation and torsades de pointes (Correct answer)
Coronary vasospasm
Pericardial effusion
Complete heart block from vagal tone

Correct answer: QT prolongation and torsades de pointes

Supratherapeutic loperamide blocks cardiac potassium channels, causing QT prolongation and life-threatening arrhythmias.

Question 100: Why does the duodenoscope elevator mechanism pose a special reprocessing challenge?

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

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

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

Question 101: Which agent is commonly used as a high-level disinfectant for flexible endoscopes?

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

Correct answer: Ortho-phthalaldehyde (OPA)

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

Question 102: A nurse is providing discharge instructions to a patient who just underwent an upper endoscopy (EGD) with biopsy. Which of the following should the nurse instruct the patient to report immediately?

Vomiting material that looks like coffee grounds. (Correct answer)
A mild sore throat and a feeling of bloating.
Drowsiness for several hours after the procedure.
One small streak of blood in the saliva shortly after the procedure.

Correct answer: Vomiting material that looks like coffee grounds.

Vomiting material that looks like coffee grounds (hematemesis) is a sign of a significant upper GI bleed, a potential complication of an EGD, especially after a biopsy. A mild sore throat, bloating, and drowsiness are expected side effects from the procedure and sedation. A small streak of blood can be normal from minor irritation.

Question 103: A Sengstaken-Blakemore tube is used as a temporizing measure for:

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

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

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

Question 104: A patient scheduled for capsule endoscopy asks when the capsule will be retrieved. What is the nurse's best response?

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

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

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

Question 105: During endoscopic mucosal resection (EMR), why is saline with dilute epinephrine injected submucosally before resection?

To shrink the polyp before removal
To lift the lesion away from the muscularis and reduce perforation and bleeding risk (Correct answer)
To sterilize the resection field
To anesthetize the bowel wall

Correct answer: To lift the lesion away from the muscularis and reduce perforation and bleeding risk

The submucosal cushion separates the lesion from deeper layers, lowering the chance of perforation and vessel injury.

Question 106: A restrictive transfusion threshold (hemoglobin <7 g/dL) is appropriate for most GI bleeding patients, but a HIGHER threshold is recommended for patients with:

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

Correct answer: Acute coronary syndrome or significant cardiac disease

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

Question 107: A patient is admitted with Clostridioides difficile. Which hand hygiene method is required after care?

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

Correct answer: Soap and water washing

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

Question 108: A patient with known diverticulosis presents with sudden, painless, large-volume bright red rectal bleeding. This presentation is most consistent with:

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

Correct answer: Diverticular bleeding

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

Question 109: A patient with acute pancreatitis classically presents with pain that:

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

Correct answer: Radiates to the back

Acute pancreatitis causes epigastric pain that radiates to the back.

Question 110: During sedation, the nurse administering medications and monitoring the patient should have which restriction on other duties?

May monitor two sedated patients simultaneously
May leave briefly to retrieve supplies from another room
No responsibilities that would leave the patient unattended or unmonitored (Correct answer)
May circulate and assist with biopsy specimen handling freely

Correct answer: No responsibilities that would leave the patient unattended or unmonitored

Standards require the monitoring nurse to have no duties that compromise continuous patient observation.

Question 111: Which type of precaution is appropriate for a patient with active pulmonary tuberculosis undergoing endoscopy?

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

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

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

Question 112: A patient with chronic pancreatitis reports bulky, foul-smelling stools. Which intervention addresses this problem?

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

Correct answer: Pancreatic enzyme replacement with meals

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

Question 113: A patient's blood pressure falls to 78/44 after sedation is administered. After stopping further sedative doses, which intervention should the nurse anticipate first?

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

Correct answer: An IV fluid bolus

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

Question 114: What is the single most effective measure to prevent transmission of infection in the endoscopy suite?

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

Correct answer: Proper hand hygiene

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

Question 115: What is the antidote for opioid-induced respiratory depression during sedation?

Atropine
Flumazenil
Naloxone (Correct answer)
Epinephrine

Correct answer: Naloxone

Naloxone reverses opioid-induced respiratory depression.

Question 116: A patient taking mesalamine for ulcerative colitis asks how the drug helps. What is the best response?

"It reduces inflammation directly in the lining of the bowel." (Correct answer)
"It replaces the enzymes your colon can't make."
"It speeds up intestinal motility."
"It kills the bacteria that cause colitis."

Correct answer: "It reduces inflammation directly in the lining of the bowel."

Mesalamine is a topical anti-inflammatory (5-ASA) that acts on the colonic mucosa to reduce inflammation.

Question 117: A nurse is preparing for a colonoscopy on a patient with a confirmed Clostridioides difficile (C. diff) infection. In addition to standard and contact precautions, which infection control measure is most critical for the staff and environment?

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

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

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

Question 118: For those who are lactose intolerant, which of the following dairy products is MOST LIKELY to have the least amount of lactose?

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

Correct answer: Greek-style whole -fat yogurt

Greek-style yogurt is typically strained more extensively than regular yogurt, which removes a significant portion of the whey. Since lactose is primarily found in the whey, this straining process results in a lower lactose content in Greek yogurt compared to regular yogurt, milk, or most cheeses. This makes it a more suitable option for individuals with lactose intolerance.

Question 119: Ascites in liver failure develops primarily due to:

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

Correct answer: Portal hypertension and low albumin

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

Question 120: A patient in the recovery area following an EGD with moderate sedation becomes increasingly somnolent and has a respiratory rate of 6 breaths/min. The physician orders flumazenil. The nurse should recognize that the primary reason for administering flumazenil is to reverse the effects of which medication?

Lidocaine (topical)
Propofol
Midazolam (Correct answer)
Fentanyl

Correct answer: Midazolam

Flumazenil is a specific benzodiazepine antagonist used to reverse the sedative effects of medications like midazolam. Naloxone is the reversal agent for opioids such as fentanyl.

Question 121: Which of the following types of cancer affects the colon and rectum the most?

Lymphoma
Adenocarcinoma (Correct answer)
Melanoma
Sarcoma

Correct answer: Adenocarcinoma

Adenocarcinoma is the most common type of colorectal cancer, accounting for over 95% of all cases. This cancer originates in the glandular cells that line the inner surface of the colon and rectum, which are responsible for producing mucus. Most colorectal cancers develop from polyps, which are abnormal growths in this lining.

Question 122: Which of the following is the most common cause of upper GI bleeding in adults?

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

Correct answer: Peptic ulcer disease

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

Question 123: According to Spaulding classification, how are flexible GI endoscopes categorized because they contact intact mucous membranes?

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

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

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

Question 124: During an initial assessment of a patient with cirrhosis, which of the following signs and symptoms would be most indicative of hepatic encephalopathy?

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

Correct answer: Asterixis and confusion.

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

Question 125: During moderate sedation with midazolam and fentanyl, a patient's respiratory rate drops to 6 breaths/min with SpO2 of 84%. After stimulating the patient and giving oxygen, which reversal agent addresses the opioid component?

Naloxone (Correct answer)
Atropine
Flumazenil
Protamine sulfate

Correct answer: Naloxone

Naloxone reverses opioid-induced respiratory depression, while flumazenil reverses benzodiazepines.

Question 126: According to the color-coded safety data, what does an SDS (Safety Data Sheet) provide for chemicals like glutaraldehyde?

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

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

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

Question 127: A patient with a Sengstaken-Blakemore tube for bleeding esophageal varices suddenly develops respiratory distress. What is the nurse's immediate action?

Increase the gastric balloon pressure
Place the patient flat and suction the mouth
Administer a PRN sedative
Cut the tube to deflate the balloons and remove it (Correct answer)

Correct answer: Cut the tube to deflate the balloons and remove it

Balloon migration into the airway is life-threatening, so scissors are kept at the bedside to immediately deflate and remove the tube.

Question 128: Which symptom pattern is most consistent with a gastric ulcer rather than a duodenal ulcer?

Pain shortly after eating with weight loss (Correct answer)
Pain relieved by food occurring 2-3 hours after meals
Painless melena with weight gain
Pain that awakens the patient at 2 AM relieved by antacids

Correct answer: Pain shortly after eating with weight loss

Gastric ulcer pain typically worsens soon after meals, leading to food avoidance and weight loss.

Question 129: A patient presents with steatorrhea (fatty stools), weight loss, and vitamin deficiencies. An intestinal biopsy reveals blunting of the villi in the duodenum. This finding is most characteristic of which GI disorder?

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

Correct answer: Celiac disease

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

Question 130: A patient with diverticulitis is admitted with fever and left lower quadrant pain. During the acute phase, which intervention is expected?

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

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

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

Question 131: A patient with a new ileostomy asks why output must be monitored closely in the first weeks. The nurse's best response is based on which risk?

Monitoring is only needed if the patient develops a fever
Ileostomy output is normally formed and infrequent
The stoma will permanently stop functioning if output is high
High-volume liquid output can cause dehydration and electrolyte imbalance (Correct answer)

Correct answer: High-volume liquid output can cause dehydration and electrolyte imbalance

Ileostomy effluent is liquid and high in sodium and water, placing new ostomates at high risk for dehydration.

Question 132: A patient with chronic hepatitis C asks about alcohol use. What is the most accurate teaching?

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

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

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

Question 133: Which assessment finding indicates a patient receiving enteral tube feeding is at risk for aspiration?

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

Correct answer: Absent bowel sounds with distension

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

Question 134: A patient scheduled for colonoscopy is prescribed polyethylene glycol solution; which finding warrants holding the prep and calling the provider?

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

Correct answer: Severe abdominal distention and inability to pass flatus

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

Question 135: A patient with short bowel syndrome is at greatest risk for deficiency of which vitamin?

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

Correct answer: Vitamin B12

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

Question 136: Which one of the following is a benzodiazepine reversal medication for an overly sedated patient?

Naloxone (Narcan)
Atropine
N-acetylcysteine
romazicon (Flumazenil) (Correct answer)

Correct answer: romazicon (Flumazenil)

Flumazenil (Romazicon) is a specific benzodiazepine receptor antagonist used to reverse the sedative effects of benzodiazepines. It competes with benzodiazepines for binding sites on GABA-A receptors in the brain, rapidly counteracting central nervous system depression. In contrast, Naloxone is used to reverse opioid overdose.

Question 137: Following successful endoscopic hemostasis of a bleeding peptic ulcer, the recommended proton pump inhibitor regimen is:

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

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

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

Question 138: Which of the following is evaluated primarily using doppler ultrasound?

Consistency (air-filled, fluid-filled)
Function
Blood flow (Correct answer)
Size and shape

Correct answer: Blood flow

Doppler ultrasound is a specialized imaging technique that uses sound waves to measure blood flow through blood vessels. It can detect the speed and direction of blood flow, identify blockages, narrowing, or other abnormalities in arteries and veins. While standard ultrasound assesses size, shape, and consistency, Doppler specifically adds the dimension of blood flow dynamics.

Question 139: A patient with a history of chronic gastritis is undergoing an endoscopy. The nurse knows that chronic inflammation of the stomach lining leads to the atrophy of which cells, resulting in pernicious anemia?

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

Correct answer: Parietal cells

Parietal cells, located in the gastric glands of the stomach, are responsible for secreting hydrochloric acid and intrinsic factor. Intrinsic factor is essential for the absorption of vitamin B12 in the ileum. Chronic gastritis can lead to the destruction of parietal cells, causing a deficiency in intrinsic factor, which in turn leads to inadequate vitamin B12 absorption and the development of pernicious anemia.

Question 140: A patient receiving total parenteral nutrition (TPN) develops elevated liver enzymes. The nurse should recognize this as a sign of which complication?

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

Correct answer: TPN-associated liver disease

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

Question 141: A nurse is educating a patient about long-term use of a proton pump inhibitor (PPI) for GERD. The nurse should include information about an increased risk for which of the following conditions?

Hypokalemia
Hypermagnesemia
Osteoporosis-related fractures (Correct answer)
Iron deficiency anemia

Correct answer: Osteoporosis-related fractures

Long-term use of PPIs can interfere with calcium absorption, leading to decreased bone density and an increased risk of osteoporosis and fractures, particularly of the hip, wrist, and spine. While micronutrient deficiencies like hypomagnesemia and vitamin B12 deficiency are also risks, osteoporosis is a major concern that requires patient education regarding calcium and vitamin D intake and bone density monitoring.

Question 142: A Dieulafoy lesion is best characterized as:

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

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

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

Question 143: What is the name of the semi-liquid that the stomach acid produced?

Chyme (Correct answer)
Thyme
Luma
Chowder

Correct answer: Chyme

After food is thoroughly mixed with gastric juices (stomach acid and enzymes) in the stomach, it is transformed into a semi-liquid, acidic paste called chyme. This chyme is then gradually released into the small intestine for further digestion and absorption. This process is essential for breaking down food into a form usable by the body.

Question 144: A patient with GERD reports symptoms despite PPI therapy. Which lifestyle modification should the nurse reinforce first?

Switch to peppermint tea after dinner
Increase citrus fruit intake
Lie flat immediately after meals
Avoid eating within 3 hours of bedtime (Correct answer)

Correct answer: Avoid eating within 3 hours of bedtime

Avoiding late meals reduces nocturnal reflux by allowing gastric emptying before recumbency.

Question 145: A patient describing symptoms of dysphagia to both solids and liquids, regurgitation of undigested food, and substernal chest pain is suspected of having achalasia. Which diagnostic test is considered the gold standard for confirming this diagnosis?

Upper endoscopy (EGD).
Barium esophagram (barium swallow).
Esophageal manometry. (Correct answer)
24-hour esophageal pH monitoring.

Correct answer: Esophageal manometry.

Esophageal manometry is the gold standard for diagnosing achalasia because it directly measures the pressure and motor function of the esophagus. It can definitively show the characteristic features of achalasia: incomplete relaxation of the lower esophageal sphincter (LES) and aperistalsis of the esophageal body. While a barium swallow may show a suggestive "bird's beak" appearance and an EGD can rule out other causes, manometry confirms the diagnosis.

Question 146: A patient with short bowel syndrome after extensive ileal resection is at greatest risk for which deficiency?

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

Correct answer: Vitamin B12 deficiency

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

Question 147: A patient with cirrhosis presents with hematemesis. Which finding most strongly suggests bleeding esophageal varices rather than peptic ulcer disease?

Splenomegaly and ascites on exam (Correct answer)
Epigastric pain relieved by food
Positive H. pylori test
History of NSAID use

Correct answer: Splenomegaly and ascites on exam

Splenomegaly and ascites indicate portal hypertension, the underlying cause of esophageal varices.

Question 148: A patient with achalasia asks why swallowing is difficult. Which explanation is accurate?

Stomach acid has eroded the esophageal lining
The gag reflex is hyperactive
A hiatal hernia is compressing the esophagus
The lower esophageal sphincter fails to relax and peristalsis is impaired (Correct answer)

Correct answer: The lower esophageal sphincter fails to relax and peristalsis is impaired

Achalasia involves failure of LES relaxation and loss of esophageal peristalsis.

Question 149: Which patient characteristic assigns an ASA physical status classification of III?

A healthy patient with no systemic disease
Mild systemic disease without functional limitation
Severe systemic disease that limits activity but is not incapacitating (Correct answer)
A moribund patient not expected to survive without the procedure

Correct answer: Severe systemic disease that limits activity but is not incapacitating

ASA III describes severe systemic disease with functional limitation, such as poorly controlled diabetes or COPD.

Question 150: The Rockall score is primarily used to:

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

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

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

Question 151: Which dietary instruction is most appropriate for a patient newly diagnosed with celiac disease?

Avoid all dairy products for life
Eliminate gluten for 6 weeks, then reintroduce
Avoid wheat, barley, and rye permanently (Correct answer)
Limit gluten to one serving daily

Correct answer: Avoid wheat, barley, and rye permanently

Celiac disease requires strict lifelong elimination of gluten from wheat, barley, and rye.

Question 152: A nurse is caring for a patient admitted with acute pancreatitis. The patient complains of severe, boring epigastric pain that radiates to the back. Which pathophysiological process is the primary cause of this intense pain?

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

Correct answer: Autodigestion of pancreatic tissue by activated enzymes

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

Question 153: Before starting azathioprine for Crohn's disease, which enzyme activity should be assessed?

Alkaline phosphatase
CYP2C19
Glucose-6-phosphate dehydrogenase
Thiopurine methyltransferase (TPMT) (Correct answer)

Correct answer: Thiopurine methyltransferase (TPMT)

Low TPMT activity causes accumulation of toxic thiopurine metabolites, increasing the risk of severe myelosuppression.

Question 154: The sphincter of Oddi controls the flow of what into the duodenum?

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

Correct answer: Bile and pancreatic secretions

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

Question 155: Which position is generally preferred for initiating a colonoscopy?

Supine with legs extended
Prone
Left lateral (Sims) position (Correct answer)
High Fowler position

Correct answer: Left lateral (Sims) position

The left lateral position aligns the rectosigmoid colon for easier scope insertion and patient comfort.

Question 156: Which laboratory finding is most indicative of significant upper GI bleeding?

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

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

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

Question 157: Bile is produced by which organ?

Liver (Correct answer)
Gallbladder
Spleen
Pancreas

Correct answer: Liver

The liver produces bile, which the gallbladder stores and concentrates.

Question 158: What does a chemical indicator (e.g., autoclave tape) confirm about a sterilized item?

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

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

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

Question 159: Which endoscopic finding on a peptic ulcer (Forrest classification) carries the highest risk of rebleeding and mandates immediate hemostasis?

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

Correct answer: Actively spurting arterial hemorrhage

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

Question 160: A sterile package is found to be wet upon removal from storage. What should the nurse do?

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

Correct answer: Consider it contaminated and do not use it

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

Question 161: Which staffing model promotes continuity of care and accountability in a GI endoscopy unit?

Team nursing with rotating assignments
Agency nurse staffing
Primary nursing model (Correct answer)
Float pool staffing

Correct answer: Primary nursing model

The primary nursing model assigns a specific nurse as the primary caregiver responsible for coordinating all aspects of a patient's care, promoting continuity and accountability.

Question 162: Which bowel preparation electrolyte imbalance is most concerning before colonoscopy?

Hypernatremia
Hypokalemia (Correct answer)
Hypercalcemia
Hyperchloremia

Correct answer: Hypokalemia

Aggressive bowel prep can cause hypokalemia, risking cardiac arrhythmias.

Question 163: Which waste is classified as regulated medical (biohazardous) waste in the endoscopy unit?

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

Correct answer: Blood-saturated dressings and used sharps

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

Question 164: What is the correct pre-procedure fasting time for clear liquids before endoscopy per common guidelines?

8 hours
2 hours (Correct answer)
12 hours
1 hour

Correct answer: 2 hours

Clear liquids are generally allowed up to 2 hours before sedation.

Question 165: Which patient position is recommended for a patient actively vomiting blood to minimize the risk of aspiration?

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

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

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

Question 166: A patient with newly diagnosed celiac disease asks which food is safe to eat. Which choice is appropriate?

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

Correct answer: Plain rice with grilled chicken

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

Question 167: A patient with Crohn's disease develops a fistula between the bowel and bladder. Which symptom supports this diagnosis?

Pneumaturia (air in the urine) (Correct answer)
Hematemesis
Jaundice
Steatorrhea

Correct answer: Pneumaturia (air in the urine)

An enterovesical fistula allows bowel gas into the bladder, causing pneumaturia.

Question 168: Which multidrug-resistant organism has been linked to contaminated duodenoscopes during ERCP procedures?

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

Correct answer: Carbapenem-resistant Enterobacteriaceae (CRE)

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

Question 169: A patient with gastroparesis should be advised to eat meals that are:

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

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

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

Question 170: Which of the following layers of the gastrointestinal wall is responsible for peristalsis and contains the myenteric plexus (Auerbach's plexus)?

Serosa
Mucosa
Submucosa
Muscularis externa (Correct answer)

Correct answer: Muscularis externa

The muscularis externa, typically consisting of an inner circular and an outer longitudinal layer of smooth muscle, is responsible for the coordinated contractions that produce peristalsis. Between these two muscle layers lies the myenteric plexus (Auerbach's plexus), which is the major nerve supply to the GI tract and controls GI tract motility.

Question 171: What engineering control minimizes staff exposure to glutaraldehyde vapor during manual reprocessing?

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

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

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

Question 172: Which patient is at highest risk for developing Clostridioides difficile infection?

A 30-year-old taking a daily probiotic
An 82-year-old on day 10 of broad-spectrum antibiotics and a proton pump inhibitor (Correct answer)
A 45-year-old on a gluten-free diet
A 25-year-old who completed a bowel prep last month

Correct answer: An 82-year-old on day 10 of broad-spectrum antibiotics and a proton pump inhibitor

Advanced age, prolonged broad-spectrum antibiotics, and acid suppression are the strongest combined risk factors for C. difficile.

Question 173: During ERCP, the patient becomes hypoxic and the nurse notes crepitus over the neck and chest. What complication does this finding suggest?

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

Correct answer: Perforation with subcutaneous emphysema

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

Question 174: Which dietary modification is the primary recommendation for patients with symptomatic diverticulosis?

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

Correct answer: High-fiber diet

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

Question 175: The Glasgow-Blatchford score is used in the management of upper GI bleeding to:

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

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

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

Question 176: A patient with newly diagnosed GERD receives education from the gastroenterology nurse. Which statement by the patient indicates a need for further teaching?

"I will try eating smaller, more frequent meals instead of three large ones."
"I will try to eat my dinner right before I go to bed to prevent nighttime hunger." (Correct answer)
"I should elevate the head of my bed by 6 to 8 inches."
"I'm going to avoid coffee, chocolate, and peppermint to see if that helps my symptoms."

Correct answer: "I will try to eat my dinner right before I go to bed to prevent nighttime hunger."

Patients with GERD should avoid lying down for at least 2 to 3 hours after eating to prevent reflux. Eating immediately before bed is contraindicated. The other statements demonstrate correct understanding of lifestyle modifications for GERD management.

Question 177: During a focused GI history, a patient reports unintentional weight loss of 12 pounds in two months, progressive dysphagia to solids, and fatigue. The nurse recognizes these as:

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

Correct answer: Alarm symptoms requiring prompt diagnostic evaluation

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

Certified Gastroenterology Registered Nurse (CGRN)

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

175

Questions

240 min

Time Limit

70%

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