1. A 63-year-old woman presents with acute gallstone pancreatitis. Over 12 hours she develops a rising bilirubin, fever to 39 degrees C, rigors, and ultrasound shows a dilated common bile duct with a retained stone. Which intervention is indicated emergently?
A) Prophylactic carbapenem therapy and observation, deferring any procedure until the pancreatitis resolves
B) Endoscopic retrograde cholangiopancreatography with sphincterotomy to relieve the biliary obstruction and treat the cholangitis
C) Immediate open necrosectomy of the pancreatic bed
D) High-volume lactated Ringer's resuscitation alone, with no biliary intervention regardless of the cholangitis
E) Elective cholecystectomy scheduled for 6 weeks later, with no acute intervention
ANSWER: B
Rationale:
This patient has acute gallstone pancreatitis with superimposed cholangitis (fever, rigors, rising bilirubin, dilated duct with a retained stone). Emergent endoscopic retrograde cholangiopancreatography (ERCP) with sphincterotomy is indicated to relieve the biliary obstruction and treat the cholangitis; ERCP is also indicated within 72 hours in severe gallstone pancreatitis with persistent biliary obstruction.
Option A: Option A is incorrect: antibiotics alone do not relieve the obstruction driving the cholangitis, and the procedure should not be deferred.
Option C: Option C is incorrect: open necrosectomy is not the management of biliary obstruction and is reserved for selected infected necrosis after a step-up approach.
Option D: Option D is incorrect: fluid resuscitation is supportive but does not address the obstructing stone and cholangitis.
Option E: Option E is incorrect: delaying all intervention for 6 weeks ignores an emergent obstructing cholangitis.
2. A 50-year-old man with acute pancreatitis has received fixed high-volume crystalloid at 500 mL/hour for 18 hours. He now has a tense, distended abdomen, oliguria, a bladder pressure of 24 mm Hg, and rising peak airway pressures. Which statement best guides ongoing fluid management?
A) Continue the fixed high-volume rate, since more fluid always improves pancreatic perfusion
B) Switch all fluids to 0.9% saline at the same rate to improve the chloride balance
C) Add a colloid bolus to further expand the intravascular space
D) Recognize evolving abdominal compartment syndrome from over-resuscitation, and shift to goal-directed therapy titrated to clinical targets such as heart rate, urine output, and hematocrit
E) Begin a forced diuresis with high-dose furosemide as the primary correction while maintaining the high infusion rate
ANSWER: D
Rationale:
The tense abdomen, bladder pressure of 24 mm Hg, oliguria, and rising airway pressures indicate abdominal compartment syndrome from over-resuscitation. Current management favors goal-directed fluid therapy titrated to clinical parameters (heart rate below about 120 bpm, urine output above 0.5 mL/kg/hour, hematocrit trending toward normal) rather than fixed high-volume protocols, and over-resuscitation should be avoided.
Option A: Option A is incorrect: more fluid is harmful here and worsens the compartment syndrome.
Option B: Option B is incorrect: changing crystalloid type does not address the volume-related compartment syndrome and saline carries its own hyperchloremic-acidosis risk.
Option C: Option C is incorrect: additional volume expansion would aggravate intra-abdominal hypertension.
Option E: Option E is incorrect: forced diuresis while maintaining a high infusion rate is not the standard correction and does not address the underlying over-resuscitation.
3. A 44-year-old man with mild acute pancreatitis is admitted for resuscitation. The admitting resident asks which crystalloid to use and what outcome benefit the supporting randomized trial demonstrated. Which response correctly applies the trial evidence to this patient?
A) Use lactated Ringer's at a moderate, goal-directed rate; the WATERFALL trial showed that aggressive resuscitation caused more fluid overload without improving outcomes compared with moderate resuscitation
B) Use 0.9% normal saline; the supporting trial showed it lowered mortality compared with lactated Ringer's
C) Use 5% dextrose in water; the trial showed free-water replacement reduced necrosis rates
D) Use hypertonic saline; the trial showed it shortened length of stay compared with all isotonic fluids
E) The choice of crystalloid has no trial support, so any fluid is equivalent for this patient
ANSWER: A
Rationale:
Lactated Ringer's is the preferred crystalloid in acute pancreatitis, and the WATERFALL randomized controlled trial addressed the rate of resuscitation: it compared aggressive with moderate goal-directed LR and found that aggressive resuscitation produced more fluid overload without improving clinical outcomes. Applying that finding, this patient should receive lactated Ringer's at a moderate, goal-directed rate rather than a fixed high-volume protocol.
Option B: Option B is incorrect: normal saline is not preferred over lactated Ringer's, and no trial established a saline mortality benefit; large-volume saline instead promotes hyperchloremic acidosis.
Option C: Option C is incorrect: dextrose in water is a free-water solution, not a resuscitation fluid, and was not studied as a resuscitation arm.
Option D: Option D is incorrect: hypertonic saline is not standard resuscitation and was not the trial intervention.
Option E: Option E is incorrect: trial evidence does support a crystalloid preference, so the fluids are not equivalent.
4. A 58-year-old man with chronic pancreatitis and exocrine insufficiency takes 50,000 lipase units with each meal, correctly timed, using pH-sensitive enteric-coated microspheres. He still has steatorrhea, and testing documents a persistently low duodenal pH. What is the most appropriate next step?
A) Discontinue the enzymes, since persistent steatorrhea proves they are ineffective in this patient
B) Switch to a non-enteric-coated preparation taken between meals
C) Reduce the lipase dose to limit fibrosing colonopathy risk
D) Add a bile acid sequestrant to bind the malabsorbed fat
E) Add a proton pump inhibitor to raise duodenal pH above the dissolution threshold so the enteric coating releases enzymes and acid does not inactivate them
ANSWER: E
Rationale:
With dosing, timing, and formulation already optimized and a documented low duodenal pH, the limiting factor is acid: the enteric coating will not dissolve and released enzymes are inactivated. Adding a proton pump inhibitor raises duodenal pH above the dissolution threshold and restores efficacy.
Option A: Option A is incorrect: the enzymes are not failing intrinsically; the acidic duodenal environment is the problem to correct.
Option B: Option B is incorrect: a non-enteric-coated product is more vulnerable to acid, and between-meal dosing desynchronizes release from nutrient delivery.
Option C: Option C is incorrect: reducing the dose would worsen steatorrhea, and the current dose is within the standard range.
Option D: Option D is incorrect: a bile acid sequestrant binds bile acids and would worsen fat absorption rather than help.
5. A 47-year-old man with alcohol-related chronic pancreatitis has persistent neuropathic-type abdominal pain inadequately controlled on acetaminophen. He has an active alcohol use disorder. Which approach best balances analgesia against his substantial risk of opioid use disorder?
A) Start a long-acting opioid around the clock as first-line therapy, accepting the dependence risk as unavoidable
B) Withhold all analgesia until he achieves alcohol abstinence
C) Add pregabalin as an opioid-sparing adjunct that modulates central pain sensitization, and emphasize alcohol cessation as the single most impactful intervention on disease progression
D) Prescribe an oral corticosteroid taper to suppress perineural inflammation as the primary analgesic strategy
E) Recommend immediate total pancreatectomy to eliminate the pain source
ANSWER: C
Rationale:
In a patient with chronic pancreatitis and active alcohol use disorder, the priority is effective analgesia while limiting opioid exposure. Pregabalin (an alpha-2-delta calcium channel subunit modulator) provides modest, opioid-sparing benefit for the neuropathic component, and alcohol cessation is the single most impactful intervention on disease progression and pain trajectory.
Option A: Option A is incorrect: making a long-acting opioid first-line ignores the heightened dependence risk and the opioid-sparing goal.
Option B: Option B is incorrect: withholding analgesia until abstinence is achieved is neither humane nor effective.
Option D: Option D is incorrect: chronic corticosteroids are not an established analgesic strategy for chronic pancreatitis and carry substantial harm.
Option E: Option E is incorrect: total pancreatectomy is not an appropriate first response to inadequately trialed medical pain management.
6. A 52-year-old woman with a biopsy-proven VIPoma has profuse watery diarrhea (4 L/day), a potassium of 2.6 mmol/L, and clinical dehydration. Surgical resection is planned but cannot proceed until she is stabilized. Which pharmacological therapy will best control the secretory diarrhea and enable electrolyte stabilization preoperatively?
A) Octreotide, which suppresses vasoactive intestinal peptide secretion and controls the secretory diarrhea in most patients, allowing fluid and potassium repletion before surgery
B) A high-dose proton pump inhibitor to halt the acid-driven component of the diarrhea
C) Diazoxide to suppress the hormone driving the diarrhea
D) Loperamide monotherapy, which corrects the underlying hormone excess
E) Oral pancreatic enzymes to treat the malabsorptive component
ANSWER: A
Rationale:
VIPoma produces secretory diarrhea through vasoactive intestinal peptide (VIP). Octreotide suppresses VIP secretion and controls the diarrhea in roughly 80 to 90 percent of patients, allowing aggressive fluid and potassium repletion and clinical stabilization before resection.
Option B: Option B is incorrect: the diarrhea is VIP-mediated secretory diarrhea, not acid-driven, and achlorhydria is part of the syndrome.
Option C: Option C is incorrect: diazoxide targets insulin release in insulinoma and does not control VIP-mediated secretion.
Option D: Option D is incorrect: loperamide does not address the hormonal driver and is inadequate as primary control of this volume of secretory loss.
Option E: Option E is incorrect: this is secretory, not malabsorptive, diarrhea, so pancreatic enzymes are not the treatment.
7. A 70-year-old man with a metastatic, inoperable insulinoma has recurrent symptomatic fasting hypoglycemia despite frequent feeding. Which pharmacological therapy is the most dependable choice to suppress insulin secretion and prevent hypoglycemia, and what should be monitored?
A) A somatostatin analogue as the most reliable first choice, with no need for glucose monitoring
B) Scheduled long-acting insulin to stabilize glucose
C) An oral sulfonylurea to downregulate beta-cell secretion
D) Diazoxide, which opens beta-cell ATP-sensitive potassium channels to suppress insulin release, with monitoring of glucose and for sodium and fluid retention (often managed with a co-prescribed thiazide)
E) A nonselective beta-blocker to blunt the adrenergic symptoms of hypoglycemia as definitive therapy
ANSWER: D
Rationale:
Diazoxide is the more dependable pharmacological option for insulinoma; it opens (activates) ATP-sensitive potassium channels in beta cells, hyperpolarizing the membrane and suppressing calcium-triggered insulin release. Glucose should be monitored, and the expected sodium and fluid retention is often managed with a co-prescribed thiazide diuretic.
Option A: Option A is incorrect: somatostatin analogues are less reliable in insulinoma (frequent lack of SSTR2) and can paradoxically worsen hypoglycemia by suppressing counter-regulatory glucagon, so they require careful glucose monitoring rather than none.
Option B: Option B is incorrect: giving insulin would deepen hypoglycemia.
Option C: Option C is incorrect: a sulfonylurea stimulates insulin secretion, worsening the problem.
Option E: Option E is incorrect: a beta-blocker only masks adrenergic warning symptoms and does not prevent hypoglycemia, making it dangerous as definitive therapy.
8. A 66-year-old woman with carcinoid syndrome and hepatic metastases is scheduled for tumor debulking under general anesthesia. The anesthesiologist asks how to prevent an intraoperative crisis of flushing, bronchospasm, and hemodynamic collapse. What is the standard prophylaxis?
A) Pretreatment with intravenous diphenhydramine and hydrocortisone as the primary preventive regimen
B) High-dose octreotide given before induction and continued as an infusion during the procedure to prevent carcinoid crisis
C) A prophylactic epinephrine infusion started before induction
D) A beta-blocker infusion to prevent catecholamine-driven hemodynamic surges
E) Withholding all somatostatin analogue therapy on the day of surgery to avoid drug interactions
ANSWER: B
Rationale:
Carcinoid crisis is a life-threatening intraoperative surge of vasoactive mediators. The standard prophylaxis is high-dose octreotide (for example, a 500-microgram intravenous bolus before induction followed by a 50 to 100 microgram/hour infusion during the procedure), and octreotide is also the treatment of choice for an established crisis.
Option A: Option A is incorrect: antihistamines and corticosteroids do not block the broad range of vasoactive mediators driving carcinoid crisis.
Option C: Option C is incorrect: epinephrine can worsen mediator release and instability and is not preventive.
Option D: Option D is incorrect: the crisis is mediated by serotonin and other vasoactive substances, not catecholamines, so a beta-blocker is not the preventive measure.
Option E: Option E is incorrect: somatostatin analogue therapy should be continued and intensified perioperatively, not withheld.
9. A 24-year-old woman with anorexia nervosa (BMI 13 kg/m2) is on day 2 of enteral feeding started at 10 kcal/kg/day. Her serum phosphate has fallen from 1.0 to 0.55 mmol/L, and potassium and magnesium are mildly low. She is asymptomatic. What is the most appropriate management?
A) Rapidly advance to full calories now that feeding has been tolerated for two days
B) Stop all nutrition indefinitely and discharge her on an oral diet
C) Switch from enteral to parenteral nutrition at full calories to bypass the electrolyte shifts
D) Add a loop diuretic to manage anticipated fluid retention and continue advancing calories
E) Hold caloric advancement, aggressively replete phosphate, potassium, and magnesium, continue thiamine, and resume cautious advancement only once electrolytes stabilize
ANSWER: E
Rationale:
A falling phosphate with low potassium and magnesium on early refeeding signals evolving refeeding syndrome. The correct response is to hold caloric advancement, aggressively replete phosphate, potassium, and magnesium, continue thiamine, and resume slow advancement only once electrolytes stabilize, with continued twice-daily monitoring.
Option A: Option A is incorrect: advancing calories now would deepen the dangerous intracellular electrolyte shift.
Option B: Option B is incorrect: abruptly stopping nutrition is not indicated; the plan is to slow advancement and replete, not abandon feeding.
Option C: Option C is incorrect: the parenteral route does not prevent insulin-driven shifts, and full calories would worsen them.
Option D: Option D is incorrect: a loop diuretic does not address the phosphate, potassium, and magnesium depletion, and continuing to advance calories is unsafe here.
10. A 38-year-old man with short bowel syndrome has been on home parenteral nutrition with a soybean-oil lipid emulsion for 8 months. He now has a rising direct bilirubin and alkaline phosphatase with imaging showing no biliary obstruction, consistent with PN-associated liver disease. Which change to his regimen is best supported?
A) Increase the soybean-oil lipid dose to provide more essential fatty acids
B) Discontinue all lipid permanently and replace the calories with dextrose indefinitely
C) Switch to a fish-oil-containing mixed-oil lipid emulsion, whose n-3 fatty acids reduce PN-associated liver disease and can reverse cholestasis
D) Add an oral bile acid sequestrant and continue the soybean-oil emulsion unchanged
E) Stop monitoring liver tests, since PN-associated liver disease is irreversible and self-limited
ANSWER: C
Rationale:
This is PN-associated liver disease (PNALD) on a soybean-oil emulsion rich in pro-inflammatory n-6 fatty acids. Switching to a fish-oil-containing mixed-oil emulsion supplies anti-inflammatory n-3 fatty acids, which reduce PNALD incidence and can reverse established cholestasis.
Option A: Option A is incorrect: increasing the n-6-rich soybean emulsion would be expected to worsen the hepatic injury.
Option B: Option B is incorrect: permanent lipid elimination risks essential fatty acid deficiency and is not the supported strategy.
Option D: Option D is incorrect: continuing the implicated emulsion unchanged does not address the lipid composition driving PNALD, and a sequestrant is not the established remedy.
Option E: Option E is incorrect: PNALD is not simply irreversible and self-limited; it warrants active intervention and continued monitoring.
11. A 61-year-old man who underwent total gastrectomy and terminal ileal resection presents two years later with fatigue, a macrocytic anemia, and a low serum vitamin B12. Which statement best explains the deficiency and guides replacement?
A) He has lost both intrinsic factor (gastric parietal cells) and the terminal ileal site of B12 uptake, so oral B12 cannot be reliably absorbed and parenteral (or high-dose sublingual) replacement is required
B) The deficiency is due to inadequate dietary folate and is corrected with oral folate alone
C) Iron deficiency from the duodenal exclusion fully explains the macrocytic anemia
D) Standard oral B12 tablets will correct the deficiency because passive ileal absorption is intact
E) The anemia reflects copper deficiency from the gastrectomy and requires copper supplementation as primary therapy
ANSWER: A
Rationale:
Total gastrectomy removes intrinsic factor (secreted by gastric parietal cells) and terminal ileal resection removes the cubilin-receptor uptake site, so the intrinsic-factor-dependent pathway for B12 absorption is doubly disrupted; oral B12 cannot be reliably absorbed and parenteral (or high-dose sublingual) replacement is required.
Option B: Option B is incorrect: folate deficiency is a separate cause of macrocytosis and would not explain a low B12, and folate alone can mask but not treat B12 deficiency.
Option C: Option C is incorrect: iron deficiency causes a microcytic, not macrocytic, anemia and does not explain the low B12.
Option D: Option D is incorrect: there is no reliable passive ileal absorption after terminal ileal resection, so standard oral tablets are inadequate.
Option E: Option E is incorrect: while copper deficiency can occur after gastric surgery, the low B12 with macrocytosis points to B12 deficiency as the primary process here.
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