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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
Sigmoidoscopy
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The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
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Inflammatory Bowel Disease I: Ulcerative Colitis01:27

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Introduction
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Inflammatory Bowel Disease II: Crohn's Disease01:30

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Updated: Jun 26, 2025

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Risk factors for delayed colorectal postpolypectomy bleeding: a meta-analysis.

Xuzhen Zhang1, Xiaoxing Jiang2, Liang Shi3

  • 1Department of Gastrointestinal Endoscopy Center, Beijing Jingmei Group General Hospital, Beijing, China.

BMC Gastroenterology
|May 14, 2024
PubMed
Summary

Delayed postpolypectomy bleeding (DPPB) is more common in males, those with hypertension, or on anticoagulation. Larger polyps and specific locations increase DPPB risk, necessitating careful endoscopic intervention.

Keywords:
Colorectal polypsMeta-analysisPostoperative bleedingRisk factors

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Area of Science:

  • Gastroenterology
  • Endoscopy
  • Colorectal Cancer Prevention

Background:

  • Delayed postpolypectomy bleeding (DPPB) is a significant complication following colorectal polypectomy.
  • Identifying risk factors is crucial for preventing DPPB and improving patient outcomes.

Purpose of the Study:

  • To systematically analyze and identify key risk factors associated with delayed postpolypectomy bleeding (DPPB) in colorectal procedures.

Main Methods:

  • A comprehensive literature search was conducted across seven major databases up to July 2022.
  • Meta-analysis of 15 studies involving 24,074 subjects was performed to calculate relative risks (RR) and 95% confidence intervals (95% CI).
  • Heterogeneity was assessed using I-squared values, and sensitivity analyses were performed.

Main Results:

  • The overall incidence of DPPB was 0.02% (95% CI, 0.01-0.03) with high heterogeneity (I² = 98%).
  • Significant risk factors identified include male sex (RR=1.64), hypertension (RR=1.54), anticoagulation use (RR=4.04), and larger polyp size (≥10 mm, RR=2.43; >10 mm, RR=3.83).
  • Polyps in the right colon (RR=2.48) and endoscopic mucosal resection (EMR) (RR=2.99) were also associated with increased DPPB risk.

Conclusions:

  • Male sex, hypertension, anticoagulation, larger polyp size, right-sided polyps, and EMR are confirmed risk factors for DPPB.
  • Endoscopists should proactively consider these factors and implement targeted interventions to mitigate DPPB risk.