General Medicine
Gastrointestinal Bleeding
Gastrointestinal bleeding for MBBS: upper versus lower sources, resuscitation, early endoscopy, peptic ulcer and variceal management, mapped to NMC codes IM15.1 to IM15.18.
MedNext Academy | 3 min read
Gastrointestinal Bleeding
Gastrointestinal bleeding for MBBS: upper versus lower sources, resuscitation, early endoscopy, peptic ulcer and variceal management, mapped to NMC codes IM15.1 to IM15.18.
This chapter covers the assessment and management of gastrointestinal bleeding, separating upper from lower sources and prioritising resuscitation before diagnosis. It emphasises early endoscopy, proton pump inhibitor therapy for ulcers, the specific management of variceal bleeding and rational transfusion.
High-yield: Gastrointestinal Bleeding
- Gastrointestinal bleeding is divided at the ligament of Treitz into upper and lower sources.
- Haematemesis and melaena indicate an upper source, while fresh rectal bleeding usually indicates a lower source.
- Massive upper bleeding can present with fresh rectal blood because of rapid transit.
- Peptic ulcer disease is the commonest cause of upper gastrointestinal bleeding.
- Variceal bleeding from portal hypertension is a life-threatening cause needing specific management.
- Resuscitation with airway protection, wide-bore access and fluids or blood precedes definitive diagnosis.
- The haemoglobin may be normal early in acute bleeding before haemodilution occurs.
- A restrictive transfusion strategy, usually to a haemoglobin around 7 grams per decilitre, improves outcomes in stable patients.
- Upper endoscopy is both diagnostic and therapeutic and should be done early after resuscitation.
- A proton pump inhibitor infusion reduces rebleeding in bleeding peptic ulcers.
- Variceal bleeding is treated with a vasoactive drug, endoscopic band ligation and antibiotic prophylaxis.
- Terlipressin or octreotide reduces portal pressure in acute variceal bleeding.
- The rectal examination is essential to assess the colour and nature of blood in the stool.
- A digital rectal and colonoscopic evaluation identifies lower gastrointestinal sources.
- Ongoing bleeding despite endoscopy may need radiological embolisation or surgery.
Gastrointestinal bleeding essentials
- **Upper versus lower:** Divided at the ligament of Treitz; haematemesis and melaena suggest upper, fresh rectal blood suggests lower.
- **First priority:** Resuscitate with access, fluids and blood before definitive diagnosis.
- **Peptic ulcer:** Commonest upper cause; early endoscopy plus a proton pump inhibitor infusion.
- **Varices:** Vasoactive drug, band ligation and antibiotic prophylaxis.
NMC competencies in this chapter
- **IM15.1:** Aetiology of upper and lower gastrointestinal bleeding
- **IM15.2:** Evaluation and stabilisation in acute volume loss
- **IM15.6:** Clinical distinction between upper and lower bleeding
- **IM15.10:** Indications for endoscopy, colonoscopy and imaging
- **IM15.11:** Resuscitation, transfusion and haemostasis plan
- **IM15.14:** Vasoactive drugs in upper gastrointestinal bleeding
- **IM15.15:** Pharmacotherapy of acid peptic disease and Helicobacter pylori
- **IM15.16:** Endoscopic interventions and surgery
Frequently Asked Questions
How is upper distinguished from lower gastrointestinal bleeding?
Bleeding above the ligament of Treitz is upper and typically causes haematemesis and melaena, while bleeding below usually causes fresh rectal blood, though brisk upper bleeds can also appear fresh per rectum.
What is the first priority in acute bleeding?
Resuscitation with airway protection, wide-bore intravenous access and fluid or blood replacement takes priority over definitive diagnosis in an unstable bleeding patient.
How is variceal bleeding managed?
Variceal bleeding is treated with a vasoactive drug such as terlipressin or octreotide, endoscopic band ligation and prophylactic antibiotics to reduce infection and rebleeding.
How does this chapter help for NEET-PG?
The upper versus lower distinction, resuscitation priorities, endoscopic therapy and variceal management are common exam themes that map directly to questions.
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