Management of lower gastrointestinal tract bleeding

Area of Science:

• Gastroenterology
• Colorectal Surgery

Background:

• Acute lower gastrointestinal bleeding (LGIB) is less common than upper GI bleeding.
• Most cases of colonic and rectal bleeding are self-limiting and do not require intervention.
• Diverticula and angiectasias are the most frequent causes of LGIB.

Purpose of the Study:

• To review the causes, diagnosis, and management of acute colonic and rectal bleeding.
• To highlight the importance of endoscopic interventions in managing LGIB.
• To discuss the role of alternative diagnostic and therapeutic modalities.

Main Methods:

• Literature review focusing on causes, diagnostic approaches, and therapeutic strategies for LGIB.
• Emphasis on colonoscopy as the primary diagnostic and therapeutic tool.
• Discussion of endoscopic techniques (injection therapy, thermocoagulation, mechanical devices) and their efficacy.
• Consideration of angiography and nuclear scintigraphy for refractory cases.

Main Results:

• Diverticula and angiectasias are the most common sources of colonic bleeding, with a high recurrence rate for diverticular bleeding.
• Malignancy, colitis, ischemia, anorectal disorders, postpolypectomy bleeding, and HIV-related issues are less frequent causes.
• Urgent colonoscopy is the preferred method for diagnosis and therapy.
• Endoscopic interventions are effective in achieving hemostasis and avoiding surgery.
• Angiography and nuclear scintigraphy serve as adjuncts when colonoscopy is not feasible or fails.

Conclusions:

• Lower GI bleeding requires prompt resuscitation and hemodynamic stabilization.
• Colonoscopy is the gold standard for diagnosing and treating acute colonic bleeding.
• Modern endoscopic techniques offer effective hemostasis, reducing the need for surgery.
• Risk stratification using stigmata of hemorrhage is increasingly important in managing LGIB.