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Endoscopic biliary stenting and pancreatitis.

Ichiro Yasuda1

  • 1First Department of Internal Medicine, Gifu University Hospital, 1-1 Yanagido, Gifu, 501-1194, Japan. YASUDAIC@aol.com.

Clinical Journal of Gastroenterology
|July 17, 2015
PubMed
Summary

Endoscopic biliary stenting may increase pancreatitis risk, particularly with large metallic stents. More research is needed to confirm this link and evaluate the necessity of prior endoscopic sphincterotomy.

Keywords:
Biliary stentingEndoscopic sphincterotomyMetallic stentPancreatitis

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Area of Science:

  • Gastroenterology
  • Endoscopy
  • Pancreatology

Background:

  • Endoscopic biliary stenting across the duodenal papilla can potentially obstruct the pancreatic orifice.
  • This obstruction may lead to disturbed pancreatic juice flow and subsequent pancreatitis.
  • The precise relationship between biliary stenting and post-procedure pancreatitis requires further investigation.

Purpose of the Study:

  • To review the existing literature on the association between endoscopic biliary stenting and pancreatitis.
  • To evaluate the role of stent characteristics, such as large-bore and self-expandable metallic stents (SEMSs), as risk factors.
  • To assess the impact of prior endoscopic sphincterotomy (EST) on post-stenting pancreatitis incidence.

Main Methods:

  • Literature review of published studies examining endoscopic biliary stenting and pancreatitis.
  • Analysis of studies considering stent type (e.g., SEMSs) and pre-stenting procedures (e.g., EST).
  • Assessment of evidence quality, study design, and subject numbers in the reviewed literature.

Main Results:

  • Existing studies provide limited convincing evidence that biliary stenting, including SEMSs, directly increases pancreatitis risk.
  • Inadequate study design and small sample sizes may explain the lack of definitive evidence.
  • The necessity of EST before biliary stenting to prevent pancreatitis remains unclear, with some studies suggesting it may not be required, even for SEMSs.

Conclusions:

  • The link between endoscopic biliary stenting and increased pancreatitis risk is not definitively established by current literature.
  • Further well-designed, large-scale studies are essential to clarify the role of biliary stenting and EST in post-procedure pancreatitis.
  • Optimal management strategies for biliary stenting require more robust evidence regarding pancreatitis prevention.