Management of Bleeding Per Rectum

Initial Assessment and Risk Stratification

• The American Gastroenterological Association recommends assessing hemodynamic status by checking pulse, blood pressure, and orthostatic vital signs to determine bleeding severity, with a complete blood count, coagulation studies, and serum creatinine also being obtained 1, 2, 3
• The European Society of Gastrointestinal Endoscopy suggests performing a digital rectal examination to confirm stool appearance, exclude anorectal pathology, and detect palpable rectal masses, with 40% of rectal cancers being palpable 1, 2
• The Oakland score is used to determine disposition, with a score ≤8 points indicating safe discharge and a score >8 points indicating major bleed requiring hospital admission, incorporating age, gender, previous lower GI bleeding, digital rectal exam findings, heart rate, systolic blood pressure, and hemoglobin level 4

Resuscitation Protocol

• The British Society of Gastroenterology recommends establishing two large-bore IV cannulae in anticubital fossae and infusing normal saline 1-2 liters initially to restore blood pressure and urine output >30 mL/hour for hemodynamically unstable patients 5
• The American College of Gastroenterology suggests transfusing packed red blood cells when hemoglobin <100 g/L or with active hematemesis and shock, and correcting coagulopathy with fresh frozen plasma if INR >1.5 1, 2, 5

Diagnostic Approach

• The American Society for Gastrointestinal Endoscopy recommends colonoscopy as the preferred diagnostic modality for most patients, performed urgently for major bleeds or within 2 weeks for minor bleeds in patients over 50 years old, with a diagnostic yield of 42-90% and allowing therapeutic intervention 4
• The European Society of Gastrointestinal Endoscopy suggests considering alternative diagnostic modalities such as technetium-99m red blood cell scan, CT angiography, or catheter angiography for severe ongoing bleeding when colonoscopy is not diagnostic 1, 2

Specific Etiologies and Management

• The American Gastroenterological Association recommends first-line treatment for hemorrhoidal disease, including dietary fiber, increased water intake, and avoidance of straining, with rubber band ligation being an effective treatment for persistent grade I-III hemorrhoids 6
• The British Society of Gastroenterology suggests using vasoactive drugs to reduce portal pressure and considering endorectal compression tube as a bridging maneuver for severe bleeding in patients with anorectal varices 3

Age-Specific Considerations

• The American College of Gastroenterology recommends full colonoscopy for patients over 50 years old with rectal bleeding, as colorectal cancer risk ranges from 2.4-11%, and considering diverticulosis and angiodysplasia as common causes in patients ≥70 years old 4, 1, 2
• The European Society of Gastrointestinal Endoscopy suggests considering inflammatory bowel disease as a leading cause in younger patients, particularly ulcerative colitis, and recognizing the higher mortality risk in older patients requiring closer monitoring 4, 1, 2, 5

Management of Bleeding Per Rectum

Diagnostic Approach and Management

• In patients with suspected complicated presentations such as rectal prolapse with ischemia, checking inflammatory markers (C-reactive protein, procalcitonin, lactate) is crucial as these correlate with tissue necrosis and mortality, according to the World Journal of Emergency Surgery 7
• For hemodynamically stable patients with irreducible or strangulated rectal prolapse, performing an urgent contrast-enhanced abdomino-pelvic CT scan is recommended to detect complications, as suggested by the World Journal of Emergency Surgery 7
• The World Journal of Emergency Surgery recommends a step-up approach for anorectal varices (portal hypertension), starting with local endoscopic maneuvers, progressing to embolization via interventional radiology, then TIPS for portal decompression, and finally liver transplantation in selected cases 7, 8
• Administering prophylactic antibiotics to all patients with cirrhosis and gastrointestinal bleeding is recommended to decrease the risk of spontaneous bacterial peritonitis and improve survival, according to the World Journal of Emergency Surgery 8
• Consideration of vasoactive drugs to reduce portal pressure is advised, though beta-blockers should be temporarily suspended if systolic blood pressure <90 mmHg, as recommended by the World Journal of Emergency Surgery 8
• TIPS is recommended for severe portal hypertension to decompress the portal venous system and reduce rebleeding risk, though it carries a 20-30% risk of encephalopathy, according to the World Journal of Emergency Surgery 8
• Requesting complete blood count, serum creatinine, and inflammatory markers (CRP, procalcitonin, lactate) is necessary to assess for ischemia or strangulation in rectal prolapse with complications, as suggested by the World Journal of Emergency Surgery 7
• Leukocytosis and elevated lactate are potential predictors of transmural bowel necrosis and mortality in acute mesenteric ischemia, according to the World Journal of Emergency Surgery 7
• When rectal bleeding is accompanied by abdominal pain, urgent evaluation is required, and consideration of inflammatory bowel disease, ischemic colitis, or complicated rectal prolapse with strangulation is necessary, as recommended by the World Journal of Emergency Surgery 7
• Performing urgent imaging (CT scan) in hemodynamically stable patients is advised to exclude perforation, ischemia, or obstruction, according to the World Journal of Emergency Surgery 7