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Related Experiment Videos

Relations between Physiologic Parameters and Pulse Transit Time during Loaded Breathing.

J Y A Foo1, C L Parsley, S J Wilson

  • 1School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Australia 4072.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 7, 2007
PubMed
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Pulse transit time (PTT) variations in children are influenced by more than just heart rate variability (HRV). Monitoring PTT can reveal physiological changes during breathing efforts.

Area of Science:

  • Pediatric Physiology
  • Cardiovascular Monitoring
  • Respiratory Mechanics

Background:

  • Pulse transit time (PTT) is a non-invasive cardiovascular measure.
  • Physiologic factors like heart rate (HR), blood pressure (BP), and arterial compliance (AC) influence baseline PTT.
  • Limited data exist on factors affecting PTT in children during breathing.

Purpose of the Study:

  • Investigate the impact of altered breathing efforts on PTT.
  • Examine the relationship between PTT fluctuations and physiological changes.
  • Assess the role of heart rate variability (HRV) in PTT variations during breathing.

Main Methods:

  • Utilized two inspiratory resistive loading (IRL) devices to simulate loaded breathing in healthy children (≤12 years).
  • Recruited two groups: one with significant HR changes and one with insignificant HR changes during testing.

Related Experiment Videos

  • Measured PTT and analyzed its relationship with breathing efforts and HRV.

    • Main Results:

    • Heart rate variability (HRV) alone does not fully explain PTT variations during breathing.
    • Changes in other physiological parameters significantly contribute to PTT fluctuations.
    • PTT monitoring indicated associated physiological changes during tidal and increased breathing efforts.

    Conclusions:

    • PTT variations in children during breathing are multifactorial, involving more than just HRV.
    • PTT can serve as a valuable indicator of underlying physiological adjustments during respiratory challenges in children.
    • Further research is warranted to fully elucidate the complex interplay of factors influencing PTT in pediatric populations.