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Related Concept Videos

Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
Blood Supply to the Digestive System01:16

Blood Supply to the Digestive System

Splanchnic circulation refers to the network of blood vessels that supply and drain blood from the abdominal organs involved in digestion, including the stomach, liver, pancreas, intestines, and spleen. This circulation delivers essential nutrients and oxygen while removing waste products from these organs.
Blood Supply to the Digestive System: The splanchnic circulation involves three main arteries: the celiac artery (also known as the celiac trunk) and the superior and inferior mesenteric...

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Related Experiment Video

Updated: Jun 10, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
10:46

Doppler Optical Coherence Tomography of Retinal Circulation

Published on: September 18, 2012

Modified Doppler flowmetry in the splanchnic circulation

R N Gibson1, P R Gibson, J D Donlan

  • 1Department of Radiology, Royal Melbourne Hospital, University of Melbourne, Victoria, Australia.

Gastroenterology
|October 1, 1993
PubMed
Summary
This summary is machine-generated.

This study validates a simplified Doppler flowmetry method for assessing short-term changes in splanchnic blood flow in portal hypertension patients. While effective for tracking flow variations, individual baseline flow unpredictability requires careful interpretation.

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Area of Science:

  • Vascular Medicine
  • Medical Imaging
  • Hepatology

Background:

  • Absolute blood flow measurements via Doppler ultrasonography often contain significant errors.
  • Portal hypertension impacts splanchnic circulation, necessitating accurate flow assessment.
  • Conventional duplex Doppler equipment is widely available for clinical use.

Purpose of the Study:

  • To validate a simplified Doppler flowmetry technique for assessing short-term changes in splanchnic blood flow.
  • To evaluate the feasibility of using this method in patients with portal hypertension.
  • To establish the reliability of Doppler flowmetry for monitoring hemodynamic changes.

Main Methods:

  • Measured peak velocity and vessel diameter as simple indices.
  • Utilized a Doppler phantom to study the peak-to-mean velocity relationship.
  • Assessed Doppler flowmetry in basal states twice within 2 hours in 28 portal hypertension patients.

Main Results:

  • Confirmed a consistent relationship between peak and mean velocities (r > 0.98).
  • Achieved successful examination in most patients for mesenteric and portal veins, but only 54% for the hepatic artery.
  • Observed stable group-averaged basal flow, but significant individual variations were noted.

Conclusions:

  • Modified Doppler flowmetry is a valid tool for evaluating short-term splanchnic blood flow changes in portal hypertension.
  • Individual variability in baseline flow presents a challenge for precise interpretation.
  • Caution is advised when interpreting Doppler flow measurements due to potential individual variances.