Answer: Statement E is NOT true
Statement E is incorrect because prophylaxis against stress ulcers using PPIs is NOT contraindicated in ICU patients; in fact, the most recent 2024 guidelines explicitly recommend using either PPIs or H2RAs for stress ulcer prophylaxis in critically ill adults with risk factors for gastrointestinal bleeding 1.
Analysis of Each Statement
Statement A - TRUE
Early enteral feeding does protect the intestinal mucosa, which is vulnerable to shock and ischemia. The 2024 SCCM guidelines confirm that enteral nutrition probably reduces upper GI bleeding risk 1. The mechanism involves maintaining gut barrier integrity and preventing bacterial translocation during critical illness.
Statement B - TRUE
"Shock liver" (ischemic hepatopathy) does manifest with massive transaminase elevations (typically >10-fold, often >1000 IU/L), along with hypoglycemia and lactic acidosis. This occurs due to acute hepatocellular necrosis from hypoperfusion and reperfusion injury.
Statement C - TRUE
Many ICU medications cause cholestasis and elevated transaminases, including antibiotics, vasopressors, sedatives, and other commonly used agents. This is a well-recognized phenomenon in critically ill patients.
Statement D - TRUE
Parenteral nutrition is reserved for cases where enteral nutrition fails or is contraindicated (bowel obstruction, ischemic bowel, severe ileus, enteral intolerance) 2. Enteral nutrition is preferred whenever possible as it maintains gut integrity and reduces complications.
Statement E - FALSE (The Answer)
The 2024 SCCM/ASHP guidelines explicitly recommend using either PPIs or H2RAs as first-line agents for stress ulcer prophylaxis in critically ill adults with risk factors 1. This is a conditional recommendation with moderate certainty of evidence.
The guidelines specify that:
- PPIs or H2RAs should be used in patients with risk factors (coagulopathy, shock, chronic liver disease)
- Low-dose regimens should be administered
- Prophylaxis should be discontinued when risk factors resolve or before ICU transfer
While concerns about pneumonia risk exist, the guidelines do not contraindicate PPI use—they simply recommend judicious use with appropriate discontinuation when no longer needed 1.
Key Clinical Pitfalls
The most common error is continuing stress ulcer prophylaxis indefinitely after ICU discharge. The guidelines emphasize discontinuing SUP before transfer out of the ICU to prevent inappropriate long-term prescribing 1.