Management of Gastrointestinal Bleeding

Initial Assessment and Resuscitation

The American College of Physicians recommends immediate evaluation and appropriate resuscitation as critical first steps, preceding further diagnostic and therapeutic measures 1, 2
Assessing hemodynamic status, including checking for pallor, tachycardia, hypotension, orthostatic changes, and signs of shock, is crucial in patients with gastrointestinal bleeding 3
Establishing large-bore intravenous access for fluid resuscitation and blood product administration is essential in managing gastrointestinal bleeding 3
The American College of Surgeons recommends stabilizing blood pressure and restoring intravascular volume with rapid infusion of normal saline or lactated Ringer solution in patients with gastrointestinal bleeding 1
Transfusing packed red blood cells to maintain hemoglobin above 7 g/dL, considering a threshold of 9 g/dL in patients with massive bleeding or significant cardiovascular comorbidities, is a recommended practice 4
Correcting coagulopathy (INR >1.5) or thrombocytopenia (<50,000/μL) with fresh frozen plasma or platelets as needed is important in managing gastrointestinal bleeding 3

The European Society of Gastrointestinal Endoscopy recommends proceeding directly to CT angiography (CTA) as the first-line investigation for hemodynamically unstable patients with gastrointestinal bleeding 5, 6
CTA can localize bleeding in the upper GI tract, small bowel, or colon and is preferred over colonoscopy in unstable patients 5
If CTA is negative but suspicion for upper GI source remains high, proceeding to urgent upper endoscopy is recommended 5
For hemodynamically stable patients, the presence of blood in NG aspirate confirms an upper GI source, and upper endoscopy (gastroscopy) should be performed within 24 hours of presentation 5, 1, 7

Blood in the NG tube with bloody stool suggests a significant upper GI bleed with brisk bleeding that has passed through the GI tract, according to the American Gastroenterological Association 5, 6
However, up to 15% of patients presenting with apparent lower GI bleeding ultimately have an upper GI source, highlighting the importance of thorough evaluation 5
The presence of bright blood in the NG aspirate is an independent predictor of rebleeding and poor outcomes, as noted by the American College of Gastroenterology 1, 2

If endoscopy identifies the bleeding source, proceeding with appropriate endoscopic hemostasis techniques is recommended by the European Society of Gastrointestinal Endoscopy 8, 9
For diverticular bleeding or other lower GI sources, endoscopic options include injection therapy, endoscopic clipping, thermal therapies, and band ligation, as suggested by the American Society for Gastrointestinal Endoscopy 9

Patients with ongoing bleeding, hemodynamic instability, or high risk of rebleeding should be admitted to an intensive care unit for close monitoring, according to the Society of Critical Care Medicine 3, 2
A decrease in hematocrit of at least 6%, transfusion requirement of more than two units of packed red blood cells, or continuous active bleeding merits ICU admission, as recommended by the American College of Critical Care Medicine 3

Delaying resuscitation while pursuing diagnostic tests is a common pitfall, and resuscitation should always take precedence, as emphasized by the American Heart Association 1, 2
Assuming lower GI bleeding based solely on rectal bleeding can lead to misdiagnosis, as up to 15% of apparent lower GI bleeds are actually from upper GI sources, according to the American Gastroenterological Association 5, 6
Failing to consider an upper GI source when NG aspirate contains blood can result in delayed diagnosis and treatment, highlighting the importance of thorough evaluation, as noted by the American College of Gastroenterology 1, 7

Tachycardia (heart rate >100 bpm), hypotension (systolic BP <100 mmHg), orthostatic changes, or signs of shock are indications for immediate ER transfer in patients with gastrointestinal bleeding, as recommended by the World Journal of Emergency Surgery 10
Any deterioration in clinical symptoms (increasing abdominal pain, rebound tenderness, need for ventilator support) or laboratory tests (renal failure, acidosis, leukocytosis) should prompt immediate ER transfer, according to the World Journal of Emergency Surgery 11, 12

Patients with minor self-terminating bleeds who are hemodynamically stable (Oakland score ≤8 points) can be managed with urgent outpatient investigation, as suggested by Gut 13
Normal vital signs, hemoglobin >100 g/L, and no active bleeding are criteria for stat outpatient GI follow-up, according to Gut 10

Patients with liver disease require specific management and should be sent to ER if any bleeding concerns, as recommended by Gut 10
Patients requiring close clinical and biological monitoring should not remain in SNF, according to the World Journal of Emergency Surgery 11, 12