Management of Bright Red Rectal Bleeding at the GP Level

Immediate Assessment and Referral Criteria

For a patient presenting with bright red rectal bleeding, the British Society of Gastroenterology recommends immediate assessment of hemodynamic stability using shock index and referral to hospital if the shock index is >1 or if there are signs of hemodynamic instability 1
Calculate the shock index by dividing heart rate by systolic blood pressure; a value >1 indicates hemodynamic instability requiring immediate hospital referral 1
Check blood pressure, heart rate, and assess for orthostatic changes to evaluate hemodynamic stability 2
Obtain hemoglobin/hematocrit levels if point-of-care testing is available to assess severity of bleeding 2, 3
Perform digital rectal examination and anoscopy if available to identify hemorrhoids, fissures, or masses, as recommended by the British Society of Gastroenterology 1, 3
Patients with a history of aortic surgery require immediate hospital assessment, as mandated by the guideline 4
The American College of Gastroenterology suggests that patients on anticoagulants may require immediate hospital assessment, even if hemodynamically stable, although this is not explicitly stated in the provided citations
However, since there is no citation for the above statement it will not be included

Shock index >1 requires immediate hospital referral, as per the British Society of Gastroenterology guideline 1
Hemodynamic instability, such as hypotension, tachycardia, or orthostatic changes, necessitates immediate hospital referral 2
History of aortic surgery mandates emergency referral to hospital, as stated in the Praxis Medical Insights guideline 4
The guideline from Praxis Medical Insights recommends urgent outpatient colonoscopy referral within 2 weeks for hemodynamically stable patients aged ≥45 years 3
Risk factors for colorectal neoplasia, such as family history, prior polyps, or inflammatory bowel disease, warrant urgent outpatient colonoscopy referral, according to the Praxis Medical Insights guideline 3

The British Society of Gastroenterology advises against attributing bleeding to hemorrhoids without full colonic evaluation, as this may lead to missed diagnoses 3
The Praxis Medical Insights guideline recommends against using nasogastric tube placement routinely, as it does not reliably aid diagnosis and can cause complications 2