ATI Student Success GI & Neuro Med-Surg
– Detailed Answer Key | Verified
Rationales, Clinical Breakdown & Exam
Mastery Guide 2026
QUESTION 1 | Peptic Ulcer Disease | MODERATE
A nurse is caring for a client with a peptic ulcer. The client reports severe, sudden-onset
abdominal pain that is rigid and board-like. What is the nurse's priority action?
A. Administer a prescribed antacid immediately
B. Prepare the client for an upper endoscopy
C. Notify the provider — assess for perforation ✓ CORRECT ANSWER
D. Encourage the client to drink clear fluids
RATIONALE: Sudden, severe, board-like rigidity is a classic sign of perforation — a life-
threatening complication of peptic ulcer disease. Stomach contents spill into the peritoneal cavity
causing peritonitis. This is a surgical emergency requiring immediate provider notification.
Antacids and fluids are contraindicated with suspected perforation, and endoscopy is delayed
until stabilization.
NCLEX Tip: Rigidity + sudden pain = perforation = call the provider NOW.
QUESTION 2 | Liver Cirrhosis / Hepatic Encephalopathy | HARD
A client with liver cirrhosis develops confusion, asterixis (flapping tremor), and fetor hepaticus.
The nurse anticipates which medication will be administered?
A. Furosemide (Lasix)
B. Lactulose (Enulose) ✓ CORRECT ANSWER
C. Spironolactone (Aldactone)
D. Neomycin sulfate orally
RATIONALE: Confusion + asterixis + fetor hepaticus indicates hepatic encephalopathy
from elevated ammonia. Lactulose is first-line — it acidifies the colon, trapping ammonia as
ammonium (NH₄⁺) for fecal excretion. Goal is 2–3 soft stools per day. Furosemide and
spironolactone treat ascites. Neomycin is an older alternative, but lactulose is the priority agent.
, Memory Hook: "Lactu-LOSE the ammonia." Monitor stool output; watch for hypokalemia
with overuse.
QUESTION 3 | IBD — Crohn's vs. Ulcerative Colitis | MODERATE
A nurse is comparing Crohn's disease and ulcerative colitis. Which finding is specific to Crohn's
disease?
A. Bloody diarrhea and rectal bleeding
B. Inflammation limited to the mucosal layer of the colon
C. Skip lesions with transmural (full-thickness) inflammation ✓ CORRECT ANSWER
D. Higher risk of colorectal cancer
RATIONALE: Skip lesions and transmural inflammation are hallmarks of Crohn's disease.
Crohn's can affect any part of the GI tract with healthy segments between diseased areas and
involves all bowel wall layers. Ulcerative colitis is continuous, limited to the colonic mucosa,
and carries a higher colorectal cancer risk. Bloody diarrhea is more characteristic of UC.
Compare: Crohn = Cobblestones, Skip lesions, Transmural. UC = Continuous, Colon only,
Cancer risk higher.
QUESTION 4 | Pancreatitis | HARD
A nurse is caring for a client with acute pancreatitis. The client's SpO₂ has dropped to 88%,
respiratory rate is 28/min, and the client appears anxious and restless. Which assessment finding
requires immediate intervention?
A. Serum lipase level of 600 U/L
B. Cullen's sign (periumbilical bruising)
C. SpO₂ 88% with tachypnea and restlessness — acute respiratory distress ✓ CORRECT
ANSWER
D. Severe epigastric pain radiating to the back
RATIONALE: SpO₂ 88% with tachypnea signals potential ARDS — a deadly systemic
complication of severe pancreatitis. Hypoxia is an immediate life threat requiring oxygen and
possible mechanical ventilation. Cullen's sign indicates retroperitoneal hemorrhage (serious but
,less immediately life-threatening than hypoxia). Elevated lipase is expected; back pain is the
classic symptom.
Pancreatitis Complications: ARDS, DIC, Hemorrhage (Grey Turner's/Cullen's signs),
Hypocalcemia, Hyperglycemia. Respiratory compromise = #1 priority.
QUESTION 5 | Ostomy Care | EASY
A nurse is teaching a client with a new sigmoid colostomy. Which statement by the client
indicates understanding?
A. "I should change my pouch system every day to prevent odor."
B. "I should cut the wafer opening ½ inch larger than my stoma."
C. "I will measure my stoma and cut the wafer ⅛ inch larger than the stoma size." ✓
CORRECT ANSWER
D. "My stoma should be pale pink or white for proper healing."
RATIONALE: The wafer opening should be cut ⅛ inch (3 mm) larger than the stoma to
protect peristomal skin while allowing natural movement. Cutting too large exposes skin to
effluent, causing excoriation. A healthy stoma should be beefy red and moist — pale or dusky
color indicates compromised blood flow. Pouch systems are changed every 3–7 days, not daily.
Healthy Stoma: Beefy red, moist, slightly raised. Pale/gray/purple = report to provider STAT.
QUESTION 6 | GERD | EASY
A nurse is teaching a client about lifestyle modifications for GERD. Which instruction should the
nurse include?
A. "Lie down for 30 minutes after each meal to aid digestion."
B. "Elevate the head of your bed 6–8 inches and avoid eating 2–3 hours before bed." ✓
CORRECT ANSWER
C. "Drink peppermint tea to soothe esophageal irritation."
D. "Wear tight-fitting clothing to support your abdomen."
RATIONALE: HOB elevation and avoiding late meals uses gravity to prevent acid reflux
during sleep. Lying down after meals worsens reflux. Peppermint relaxes the lower esophageal
, sphincter (LES), making GERD worse. Tight clothing increases intra-abdominal pressure,
promoting reflux.
GERD Avoid List: Caffeine, alcohol, peppermint, chocolate, spicy/fatty foods, tobacco — all
relax the LES or increase acid.
QUESTION 7 | GI Bleeding — Upper vs. Lower | MODERATE
A client presents with melena, dizziness, and HR 118 bpm. The nurse should prioritize which
intervention?
A. Insert a rectal tube for stool specimen collection
B. Prepare the client for an immediate colonoscopy
C. Establish large-bore IV access and initiate fluid resuscitation ✓ CORRECT
ANSWER
D. Obtain stool guaiac testing
RATIONALE: Melena with tachycardia signals significant upper GI hemorrhage with
hemodynamic instability. Priority is circulatory resuscitation — large-bore IV (16–18G), NS or
LR bolus, type and crossmatch, and close monitoring. Stool guaiac is redundant when melena is
visible. Colonoscopy follows stabilization. A rectal tube is inappropriate.
Melena = Upper GI bleed (blood digested in transit). Hematochezia (bright red) = lower GI
or massive upper GI bleed. Both require immediate hemodynamic assessment.
QUESTION 8 | Appendicitis | MODERATE
A nurse assesses a client suspected of having appendicitis. Which finding is most significant?
A. Dull, periumbilical pain present for 3 days
B. Nausea and vomiting after meals
C. Rebound tenderness at McBurney's point with sudden pain relief followed by diffuse
pain ✓ CORRECT ANSWER
D. Low-grade fever (38.0°C / 100.4°F)
RATIONALE: Rebound tenderness at McBurney's point followed by sudden relief then
diffuse pain is a red flag for rupture/perforation. When the appendix ruptures, pain briefly
– Detailed Answer Key | Verified
Rationales, Clinical Breakdown & Exam
Mastery Guide 2026
QUESTION 1 | Peptic Ulcer Disease | MODERATE
A nurse is caring for a client with a peptic ulcer. The client reports severe, sudden-onset
abdominal pain that is rigid and board-like. What is the nurse's priority action?
A. Administer a prescribed antacid immediately
B. Prepare the client for an upper endoscopy
C. Notify the provider — assess for perforation ✓ CORRECT ANSWER
D. Encourage the client to drink clear fluids
RATIONALE: Sudden, severe, board-like rigidity is a classic sign of perforation — a life-
threatening complication of peptic ulcer disease. Stomach contents spill into the peritoneal cavity
causing peritonitis. This is a surgical emergency requiring immediate provider notification.
Antacids and fluids are contraindicated with suspected perforation, and endoscopy is delayed
until stabilization.
NCLEX Tip: Rigidity + sudden pain = perforation = call the provider NOW.
QUESTION 2 | Liver Cirrhosis / Hepatic Encephalopathy | HARD
A client with liver cirrhosis develops confusion, asterixis (flapping tremor), and fetor hepaticus.
The nurse anticipates which medication will be administered?
A. Furosemide (Lasix)
B. Lactulose (Enulose) ✓ CORRECT ANSWER
C. Spironolactone (Aldactone)
D. Neomycin sulfate orally
RATIONALE: Confusion + asterixis + fetor hepaticus indicates hepatic encephalopathy
from elevated ammonia. Lactulose is first-line — it acidifies the colon, trapping ammonia as
ammonium (NH₄⁺) for fecal excretion. Goal is 2–3 soft stools per day. Furosemide and
spironolactone treat ascites. Neomycin is an older alternative, but lactulose is the priority agent.
, Memory Hook: "Lactu-LOSE the ammonia." Monitor stool output; watch for hypokalemia
with overuse.
QUESTION 3 | IBD — Crohn's vs. Ulcerative Colitis | MODERATE
A nurse is comparing Crohn's disease and ulcerative colitis. Which finding is specific to Crohn's
disease?
A. Bloody diarrhea and rectal bleeding
B. Inflammation limited to the mucosal layer of the colon
C. Skip lesions with transmural (full-thickness) inflammation ✓ CORRECT ANSWER
D. Higher risk of colorectal cancer
RATIONALE: Skip lesions and transmural inflammation are hallmarks of Crohn's disease.
Crohn's can affect any part of the GI tract with healthy segments between diseased areas and
involves all bowel wall layers. Ulcerative colitis is continuous, limited to the colonic mucosa,
and carries a higher colorectal cancer risk. Bloody diarrhea is more characteristic of UC.
Compare: Crohn = Cobblestones, Skip lesions, Transmural. UC = Continuous, Colon only,
Cancer risk higher.
QUESTION 4 | Pancreatitis | HARD
A nurse is caring for a client with acute pancreatitis. The client's SpO₂ has dropped to 88%,
respiratory rate is 28/min, and the client appears anxious and restless. Which assessment finding
requires immediate intervention?
A. Serum lipase level of 600 U/L
B. Cullen's sign (periumbilical bruising)
C. SpO₂ 88% with tachypnea and restlessness — acute respiratory distress ✓ CORRECT
ANSWER
D. Severe epigastric pain radiating to the back
RATIONALE: SpO₂ 88% with tachypnea signals potential ARDS — a deadly systemic
complication of severe pancreatitis. Hypoxia is an immediate life threat requiring oxygen and
possible mechanical ventilation. Cullen's sign indicates retroperitoneal hemorrhage (serious but
,less immediately life-threatening than hypoxia). Elevated lipase is expected; back pain is the
classic symptom.
Pancreatitis Complications: ARDS, DIC, Hemorrhage (Grey Turner's/Cullen's signs),
Hypocalcemia, Hyperglycemia. Respiratory compromise = #1 priority.
QUESTION 5 | Ostomy Care | EASY
A nurse is teaching a client with a new sigmoid colostomy. Which statement by the client
indicates understanding?
A. "I should change my pouch system every day to prevent odor."
B. "I should cut the wafer opening ½ inch larger than my stoma."
C. "I will measure my stoma and cut the wafer ⅛ inch larger than the stoma size." ✓
CORRECT ANSWER
D. "My stoma should be pale pink or white for proper healing."
RATIONALE: The wafer opening should be cut ⅛ inch (3 mm) larger than the stoma to
protect peristomal skin while allowing natural movement. Cutting too large exposes skin to
effluent, causing excoriation. A healthy stoma should be beefy red and moist — pale or dusky
color indicates compromised blood flow. Pouch systems are changed every 3–7 days, not daily.
Healthy Stoma: Beefy red, moist, slightly raised. Pale/gray/purple = report to provider STAT.
QUESTION 6 | GERD | EASY
A nurse is teaching a client about lifestyle modifications for GERD. Which instruction should the
nurse include?
A. "Lie down for 30 minutes after each meal to aid digestion."
B. "Elevate the head of your bed 6–8 inches and avoid eating 2–3 hours before bed." ✓
CORRECT ANSWER
C. "Drink peppermint tea to soothe esophageal irritation."
D. "Wear tight-fitting clothing to support your abdomen."
RATIONALE: HOB elevation and avoiding late meals uses gravity to prevent acid reflux
during sleep. Lying down after meals worsens reflux. Peppermint relaxes the lower esophageal
, sphincter (LES), making GERD worse. Tight clothing increases intra-abdominal pressure,
promoting reflux.
GERD Avoid List: Caffeine, alcohol, peppermint, chocolate, spicy/fatty foods, tobacco — all
relax the LES or increase acid.
QUESTION 7 | GI Bleeding — Upper vs. Lower | MODERATE
A client presents with melena, dizziness, and HR 118 bpm. The nurse should prioritize which
intervention?
A. Insert a rectal tube for stool specimen collection
B. Prepare the client for an immediate colonoscopy
C. Establish large-bore IV access and initiate fluid resuscitation ✓ CORRECT
ANSWER
D. Obtain stool guaiac testing
RATIONALE: Melena with tachycardia signals significant upper GI hemorrhage with
hemodynamic instability. Priority is circulatory resuscitation — large-bore IV (16–18G), NS or
LR bolus, type and crossmatch, and close monitoring. Stool guaiac is redundant when melena is
visible. Colonoscopy follows stabilization. A rectal tube is inappropriate.
Melena = Upper GI bleed (blood digested in transit). Hematochezia (bright red) = lower GI
or massive upper GI bleed. Both require immediate hemodynamic assessment.
QUESTION 8 | Appendicitis | MODERATE
A nurse assesses a client suspected of having appendicitis. Which finding is most significant?
A. Dull, periumbilical pain present for 3 days
B. Nausea and vomiting after meals
C. Rebound tenderness at McBurney's point with sudden pain relief followed by diffuse
pain ✓ CORRECT ANSWER
D. Low-grade fever (38.0°C / 100.4°F)
RATIONALE: Rebound tenderness at McBurney's point followed by sudden relief then
diffuse pain is a red flag for rupture/perforation. When the appendix ruptures, pain briefly
