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Pressure changes induced by whole body acceleration shocks.

E Belardinelli1, M Ursino, G Fabbri

  • 1Department of Electronics, Computer Science and Systems, Bologna, Italy.

Journal of Biomechanical Engineering
|February 1, 1991
PubMed
Summary
This summary is machine-generated.

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Sudden body accelerations can cause significant, rapid pressure spikes in major arteries, exceeding normal blood pressure values. These findings align with mathematical models predicting physiological responses to impulse impacts.

Area of Science:

  • Physiology
  • Biomechanics
  • Cardiovascular Research

Background:

  • Sudden body accelerations can impact physiological systems.
  • Understanding cardiovascular responses to dynamic forces is crucial for safety and health.
  • Existing mathematical models require in vivo validation.

Purpose of the Study:

  • To investigate in vivo the cardiovascular pressure changes induced by sudden body acceleration.
  • To compare experimental results with predictions from a mathematical model.
  • To quantify the magnitude and damping characteristics of pressure waves.

Main Methods:

  • Experiments were conducted on dogs subjected to controlled, short-duration body accelerations.
  • Acceleration was generated using a compressed air piston system.

Related Experiment Videos

  • Vascular pressure was measured in the carotid artery and abdominal aorta.

    • Main Results:

    • Significant transient pressure peaks were observed in major arteries following acceleration (e.g., +25 mmHg in the carotid artery at 0.5g).
    • Pressure changes demonstrated rapid damping, with a time constant of approximately 0.1 seconds.
    • Experimental data closely correlated with the predictions of the mathematical model.

    Conclusions:

    • In vivo body accelerations can induce substantial, transient increases in arterial blood pressure.
    • The mathematical model accurately predicts the cardiovascular response to impulse accelerations.
    • Even common accelerations may lead to pressure fluctuations beyond typical physiological ranges.