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Updated evidence on epidemiology, diagnosis, and treatment for colonic diverticular bleeding
Chikamasa Ichita1,2, Takaaki Kishino3, Tomonori Aoki4
1Gastroenterology Medicine Center Shonan Kamakura General Hospital Kanagawa Japan.
Insights
Colonic diverticular bleeding (CDB) is now the leading cause of lower GI bleeding in Japan. Endoscopic treatments like clipping and band ligation are effective, with band ligation showing lower rebleeding rates.
Area of Science:
- Gastroenterology
- Endoscopic interventions
- Gastrointestinal bleeding research
Background:
- Colonic diverticular bleeding (CDB) is increasingly prevalent in Japan, particularly among the aging population using antithrombotics.
- It is now the most common cause of lower gastrointestinal bleeding in the region.
- While spontaneous hemostasis occurs in most cases, significant rebleeding rates (up to 35%) and potential for hypovolemic shock necessitate effective interventions.
Purpose of the Study:
- To review the latest epidemiological data on CDB in Japan.
- To summarize current evidence on endoscopic hemostasis techniques for CDB.
- To identify areas for future research in CDB management.
Main Methods:
- Systematic review of recent large-scale studies, including the CODE BLUE-J initiative in Japan.
- Analysis of epidemiological trends and risk factors for CDB.
- Evaluation of the efficacy and comparative outcomes of various endoscopic hemostasis methods.
Main Results:
- CDB is the most frequent cause of lower GI bleeding in Japan, linked to an aging demographic and antithrombotic use.
- Endoscopic therapies, specifically clipping and endoscopic band ligation, are crucial due to the lack of pharmacological treatments.
- Endoscopic band ligation demonstrates lower rebleeding rates (13%-15%) compared to clipping, with technique choice influenced by bleeding characteristics and diverticulum location.
Conclusions:
- Endoscopic band ligation and direct clipping are effective first-line treatments for CDB.
- Further research is essential to enhance diagnostic accuracy, refine endoscopic techniques, and reduce rebleeding rates.
- Improved management strategies are needed to optimize patient outcomes for this common gastrointestinal emergency.
Abstract:
Since 2020, multiple large-scale studies (CODE BLUE-J) in Japan have accelerated the accumulation of evidence on colonic diverticular bleeding (CDB). This review summarizes the latest findings regarding CDB epidemiology and endoscopic hemostasis. Recent data show that CDB has become the most common cause of lower gastrointestinal bleeding in Japan, driven by an aging population and the increased use of antithrombotic medications. Although 70%-90% of patients achieve spontaneous hemostasis, rebleeding occurs in up to 35% of cases within 1 year. Despite an overall mortality rate of < 1%, patients with CDB can present with hypovolemic shock and may require urgent intervention. There are no effective pharmacological treatments for controlling CDB. Therefore, endoscopic therapy plays a crucial role in its management. Based on available evidence, both clipping and endoscopic band ligation are considered effective initial treatments. Recent studies indicate that direct clipping reduces early rebleeding compared with indirect clipping, while endoscopic band ligation achieves lower rebleeding rates (13%-15%) than clipping. The choice between direct clipping and endoscopic band ligation depends on the diverticulum location and the presence of active bleeding. Newer techniques, such as over-the-scope clip and self-assembling peptide application, have shown potential, but require further study. The detection of the bleeding source remains challenging because accurate identification is essential for successful hemostasis. Additional research is needed to refine the endoscopic diagnostic and therapeutic techniques, prevent rebleeding, and improve patient outcomes.
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