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Related Experiment Videos

Normal sphincter of oddi motor function.

Kinnari Kher1, Moises Guelrud

  • 1Division of Gastroenterology, Tufts University School of Medicine, Tufts New England Medical Center, 750 Washington Street, Box 233, Boston, MA 02111, USA.

Current Gastroenterology Reports
|June 12, 2004
PubMed
Summary

Sphincter of Oddi (SO) manometry, performed during ERCP, directly measures SO motor activity. Elevated basal SO pressure is key for diagnosing SO dysfunction, though pancreatitis is a risk.

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Area of Science:

  • Gastroenterology
  • Digestive Physiology

Background:

  • Endoscopic retrograde cholangiopancreatography (ERCP) manometry allows characterization of sphincter of Oddi (SO) motor activity.
  • SO manometry is the sole method for direct measurement of SO motor function, typically during ERCP.
  • It is considered the gold standard for diagnosing sphincter dysfunction.

Purpose of the Study:

  • To review the technique and normal values of SO manometry.
  • To discuss factors influencing SO pressures and interpretation of manometric tracings.
  • To highlight the incidence and potential mitigation of post-manometry pancreatitis.

Main Methods:

  • Direct measurement of SO motor activity using ERCP manometry.
  • Analysis of phasic contractions and tonic pressure.
  • Comparison of basal pressures between biliary and pancreatic sphincters.

Main Results:

  • SO motility exhibits phasic contractions superimposed on tonic pressure.
  • Elevated basal SO pressure is the most reliable criterion for SO dysfunction.
  • Pancreatitis incidence is significantly higher in patients with SO dysfunction compared to healthy individuals.

Conclusions:

  • SO manometry is essential for diagnosing SO dysfunction, with elevated basal pressure being a key indicator.
  • Understanding SO manometry interpretation and influencing factors is crucial.
  • Newer microtransducer technology may reduce the risk of post-manometry pancreatitis.

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