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Modulation of Pulse Propagation and Blood Flow via Cuff Inflation-New Distal Insights.
Laura I Bogatu1,2, Simona Turco1, Massimo Mischi1
1Department of Electrical Engineering, Eindhoven University of Technology, 5612AZ Eindhoven, The Netherlands.
Sensors (Basel, Switzerland)
|August 28, 2021
Summary
This study reveals dynamic vascular changes in the distal arm during blood pressure cuff inflation, offering new insights for critical care monitoring. These findings enhance cuff-based blood pressure measurement strategies by considering previously overlooked distal effects.
Area of Science:
- Biomedical Engineering
- Cardiovascular Physiology
- Critical Care Medicine
Background:
- Standard critical care practice relies on cuff sphygmomanometry for intermittent blood pressure (BP) measurements.
- Cuff devices can modulate blood flow and pulse propagation, offering potential for additional physiological insights.
- Previous research analyzed vascular response to occlusion non-invasively, but distal effects were neglected.
Purpose of the Study:
- To gain insights into distal vascular dynamics during cuff inflation using invasive measurements.
- To develop advanced cuff-based measurement strategies informed by these insights.
- To explore compensatory mechanisms in the vasculature during blood pressure monitoring.
Main Methods:
- Collected invasive blood pressure (BP) data downstream from the cuff in two operating room patients.
- Analyzed dynamic vascular responses, including mean arterial pressure and pulse transit time changes.
- Developed a mathematical model to replicate observed distal arm behaviors.
Main Results:
- Observed significant dynamic processes in the distal arm during cuff inflation.
- Recorded a mean arterial pressure increase of 20 mmHg in the distal artery.
- Noted a decrease in pulse transit time by 20 ms, indicating previously neglected distal vasculature effects.
Conclusions:
- Distal vascular effects during cuff inflation are significant and previously underestimated.
- Developed insights can refine cuff-based measurement strategies for critical care.
- New strategies aim to provide information on pulse arrival time, BP calibration, artery compliance, peripheral resistance, and artery-vein interaction.
Keywords:
blood pressure cuffcuff-based measurementflow modulationfunctional hemodynamic monitoringocclusion-based perturbationpulse arrival timepulse propagation modulationpulse transit timeMore Related Videos
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