ICU · GI & nutrition
GI Bleeding, Pancreatitis, Hepatic Failure and Nutrition
Also known as GI bleeding · Acute pancreatitis · Acute liver failure · Nutritional support · Stress ulcer prophylaxis · Enteral nutrition
The GI and the nutritional disorders in the ICU span the upper GI bleeding (the peptic ulcer, the varices), the acute pancreatitis (the severe, the infected necrosis), the acute liver failure (the paracetamol, the encephalopathy), and the nutritional support (the early enteral preferred, the stress ulcer prophylaxis). This topic builds the examiner's framework on each, with the evidence for the restrictive transfusion and endoscopy timing (the Villanueva trial and the international consensus), the stress ulcer prophylaxis (the SUP-ICU trial), the early enteral nutrition (the NUTRIREA-2 trial), the route of feeding (the CALORIES trial), the permissive underfeeding (the PermiT trial and the 2024 meta-analysis), the caloric and the protein targets (the ESPEN and the SCCM/ASPEN guidelines), the residual-volume and prokinetic practice (REGANE, Cochrane), and the acute liver failure (the King's College criteria and the NAC trials).
Checked against its sources on 2 Sept 2026
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Meet the patient
A 62-year-old man, three weeks into ICU for ventilated aspiration pneumonia, suddenly vomits fresh red blood around his nasogastric tube. He is on noradrenaline 0.15 mcg/kg/min, his platelet count is 38 x10^9/L from a week's piperacillin-tazobactam, and his INR is 1.7 — an unplanned ICU admission at risk for gastrointestinal bleeding, the enrolment frame used by SUP-ICU. His morning phosphate is 0.42 mmol/L because you started trophic feeding last night, and the dietician wants to advance him to his target rate this morning.[16]
Two questions decide his next hour: where is the bleed coming from (the at-risk patient may benefit from prophylaxis even though it does not change mortality), and who is about to die of refeeding (the phosphate that fell overnight after feeding started is the canary — the refeeding syndrome declares itself within 72 hours of commencing nutrition; correct the K/Mg/PO4, give thiamine, and restrict the calories).[16][34][35]
References36ShowHide
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