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Pulse transit time as a derived noninvasive mean to monitor arterial distensibility changes in children

J Y A Foo1, S J Wilson, G Williams

  • 1School of Information Technology and Electrical Engineering, University of Queensland, St Lucia Campus, Brisbane, Queensland, Australia. jong@itee.uq.edu.au

Journal of Human Hypertension
|May 28, 2005
PubMed

Insights

Pulse transit time (PTT) offers a noninvasive method to estimate pulse wave velocity (PWV) in children. This study shows PTT is a reliable surrogate for PWV, aiding cardiovascular monitoring in pediatric populations.

Area of Science:

  • Cardiovascular Physiology
  • Pediatric Health
  • Biomedical Engineering

Background:

  • Arterial distensibility changes are key indicators of cardiovascular issues like hypertension.
  • Pulse wave velocity (PWV) reflects arterial distensibility, but noninvasive measurement techniques are limited.
  • Pulse transit time (PTT) is a noninvasive technique based on PWV, proven in adults but unstudied in children.

Purpose of the Study:

  • To assess the suitability and utility of PTT for estimating PWV in children.
  • To investigate the impact of different postures on PWV derivations using PTT.
  • To compare PTT-derived PWV with existing pediatric PWV studies.

Main Methods:

  • Two computational methods were used to derive PWV from PTT measurements.
  • Data were collected from 23 normotensive Caucasian children (5-12 years old) measuring from finger to toe.
  • Statistical analyses compared results with previous pediatric PWV studies, considering postural variations.

Main Results:

  • PWV derived from the upper limb showed significant correlation (P<0.05) across different computational methods and postures.
  • PTT measurements demonstrated a reliable correlation for PWV estimation in the pediatric subjects.
  • No significant differences were observed based on posture or calculation method.

Conclusions:

  • PTT is a convenient, noninvasive surrogate for derived PWV in children, suitable for prolonged clinical studies.
  • The technique is particularly useful for younger or less cooperative children.
  • The simple setup and noninvasive nature of PTT support its application in ambulatory cardiovascular monitoring for children.

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