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Role of Doppler Ultrasound in Severe Peptic Ulcer Hemorrhage

2014-08-27 03:51:06 | BioPortfolio

Summary

The aim of study is to evaluate whether Doppler ultrasound can accurately identify patients who are at risk of recurrent bleeding, who will require endoscopic therapy, and who will fail endoscopic therapy.

Description

Bleeding peptic ulcer is a life-threatening emergency. Endoscopic therapy is a proven technique in the acute hemostasis of bleeding ulcers. Currently there is no objective assessment of adequacy of endoscopic therapy. Endoscopic Doppler ultrasound enables endoscopists in detecting blood flow in a vessel beneath an ulcer. A persistent signal after endoscopic therapy predicts recurrent bleeding. The current study proposes to compare assessment of ulcer base using either Doppler ultrasound or endoscopists' interpretation of ulcer floors. The trial design is one of a prospective randomized controlled cross-over study in which patients with severe upper gastrointestinal bleeding and documented peptic ulcers at endoscopy are enrolled.

Study Design

Allocation: Randomized, Control: Active Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment

Conditions

Peptic Ulcer Hemorrhage

Intervention

Doppler ultrasound probe

Location

Endoscopy Center, Prince of Wales Hospital
Hong Kong SAR
China

Status

Recruiting

Source

Chinese University of Hong Kong

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:51:06-0400

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Medical and Biotech [MESH] Definitions

Bleeding from a PEPTIC ULCER that can be located in any segment of the GASTROINTESTINAL TRACT.

Penetration of a PEPTIC ULCER through the wall of DUODENUM or STOMACH allowing the leakage of luminal contents into the PERITONEAL CAVITY.

Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)

Ulcer that occurs in the regions of the GASTROINTESTINAL TRACT which come into contact with GASTRIC JUICE containing PEPSIN and GASTRIC ACID. It occurs when there are defects in the MUCOSA barrier. The common forms of peptic ulcers are associated with HELICOBACTER PYLORI and the consumption of nonsteroidal anti-inflammatory drugs (NSAIDS).

Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.

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