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Related Experiment Video

Updated: Jul 19, 2026

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
07:44

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction

Published on: March 25, 2022

Ultrasonographic bisection approximation method for gastrointestinal obstruction in ER.

Cheng-Kuan Lin1, Han-Mo Chiu, Wan-Ching Lien

  • 1Department of Internal Medicine, Far Eastern Memorial Hospital, Taiwan.

Hepato-Gastroenterology
|September 26, 2006
PubMed
Summary

Ultrasonography accurately identifies gastrointestinal obstruction levels and causes in emergency settings. This imaging technique aids physicians in diagnosing gastrointestinal obstruction and selecting appropriate follow-up studies.

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Area of Science:

  • Radiology
  • Gastroenterology
  • Emergency Medicine

Background:

  • Gastrointestinal obstruction is a common emergency department presentation.
  • Accurate diagnosis of obstruction level and cause is crucial for patient management.

Purpose of the Study:

  • To assess the diagnostic accuracy of ultrasonography for gastrointestinal obstruction.
  • To evaluate ultrasonography's ability to determine obstruction levels and etiologies.

Main Methods:

  • Prospective study of 229 patients with suspected gastrointestinal obstruction.
  • Systematic ultrasonography of the gastrointestinal tract using the 'bisection approximation method'.
  • Correlation of ultrasound findings with surgical or radiological diagnoses.

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Last Updated: Jul 19, 2026

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
07:44

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction

Published on: March 25, 2022

Main Results:

  • Ultrasonography demonstrated 93% accuracy in diagnosing gastrointestinal obstruction.
  • High accuracy in localizing obstruction in the gastric outlet, duodenum, and colon (100% and 98%).
  • Variable accuracy in identifying etiologies across different segments (67% gastric outlet/duodenum, 78% colon).

Conclusions:

  • Ultrasonography is a valuable tool for diagnosing gastrointestinal obstruction in the emergency department.
  • It effectively localizes obstruction and aids in determining causes.
  • Findings guide the selection of further diagnostic investigations.