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Related Experiment Videos

Sequential tonometry as a practical method to estimate truncal pulse wave velocity.

Y P Lin1, C H Chen, T L Hsu

  • 1Department of Medicine, Taipei Veterans General Hospital, Taiwan, ROC.

Zhonghua Yi Xue Za Zhi = Chinese Medical Journal; Free China Ed
|April 2, 2002
PubMed
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Pulse wave velocity (PWV) measurements using sequential applanation tonometry and Doppler velocimetry showed no significant differences between sequential and simultaneous methods. However, tonometry yielded higher PWV values than velocimetry.

Area of Science:

  • Cardiovascular physiology
  • Arterial stiffness assessment
  • Biomedical engineering

Background:

  • Pulse wave velocity (PWV) is a key indicator of arteriosclerosis.
  • PWV measurement involves recording pressure or flow signals at two arterial sites.
  • Comparing PWV values across different measurement techniques is crucial.

Purpose of the Study:

  • To investigate if different PWV measurement techniques yield comparable values.
  • To compare sequential versus simultaneous PWV measurements.
  • To evaluate tonometry and velocimetry methods for PWV assessment.

Main Methods:

  • Aortic PWV measured in 101 patients using sequential applanation tonometry and Doppler velocimetry.
  • Simultaneous measurements performed using 2 tonometers (50 subjects) or 2 Doppler probes (23 subjects).

Related Experiment Videos

  • Comparison of PWV values derived from sequential and simultaneous approaches for both techniques.

    • Main Results:

    • No significant difference in PWV between sequential and simultaneous tonometry (p=0.09).
    • No significant difference in PWV between sequential and simultaneous velocimetry (p=0.35).
    • Sequential tonometry yielded significantly higher PWV than sequential velocimetry (p < 0.001), with strong correlation (r=0.83).

    Conclusions:

    • Sequential applanation tonometry is a practical and cost-effective method for PWV measurement.
    • Caution is advised when interpreting PWV values obtained from different methodologies.
    • Applanation tonometry may result in higher PWV values compared to Doppler velocimetry.