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Related Concept Videos

Urodynamic Studies: Uroflowmetry01:19

Urodynamic Studies: Uroflowmetry

Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...

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Related Experiment Video

Updated: May 16, 2026

Assessment of Human Adipose Tissue Microvascular Function Using Videomicroscopy
07:24

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Published on: September 29, 2017

How should flow-mediated dilation be normalized to its stimulus?

Lee Stoner1, Michael A Tarrant, Simon Fryer

  • 1School of Sport and Exercise, Massey University, Wellington, New Zealand. l.stoner@massey.ac.nz

Clinical Physiology and Functional Imaging
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

The brachial artery flow-mediated dilation (FMD) test assesses endothelial function but suffers from poor reliability. New statistical methods using shear rate-diameter dose-response curves can improve FMD test accuracy for cardiovascular disease prediction.

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Last Updated: May 16, 2026

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A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
09:33

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology

Published on: February 7, 2015

Area of Science:

  • Cardiovascular Research
  • Vascular Biology
  • Biomedical Engineering

Background:

  • The brachial artery flow-mediated dilation (FMD) test is a non-invasive standard for assessing endothelial function.
  • Reduced FMD is an early indicator of atherosclerosis and a predictor of cardiovascular events.
  • Current FMD methodology faces limitations in reliability due to expression, measurement variance, and stimulus accounting.

Purpose of the Study:

  • To address the poor reliability of the standard FMD test.
  • To propose statistical methods for improving the accuracy and validity of endothelial function assessment.
  • To enhance the predictive value of FMD for cardiovascular disease.

Main Methods:

  • Implementing statistical practices to overcome FMD limitations.
  • Estimating endothelial function using shear rate-diameter dose-response curves.
  • Analyzing dose-response data with hierarchical linear modeling.

Main Results:

  • The proposed statistical methods can account for limitations in standard FMD methodology.
  • Shear rate-diameter dose-response curves offer a potential improvement over traditional FMD measurements.
  • Hierarchical linear modeling provides a robust analytical framework for these curves.

Conclusions:

  • The use of dose-response curves and advanced statistical analysis can significantly improve the reliability and validity of the FMD test.
  • This approach holds promise for more accurate endothelial function assessment and cardiovascular risk prediction.
  • Refined FMD testing can lead to better understanding and management of atherosclerosis.