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Peripheral arterial volume distensibility changes with applied external pressure: significant difference between
Mengyan Chen1, Aiqing Chen2, Xiaoshui Si1
1Intensive Care Unit, Yiwu Central Hospital, Yiwu City, China.
Scientific Reports
|January 18, 2017
Summary
External cuff pressure increases arterial volume distensibility in peripheral arteries. More compliant arteries show a greater response to pressure changes, highlighting non-linear relationships in vascular mechanics.
Area of Science:
- Biomedical Engineering
- Cardiovascular Physiology
Background:
- Arterial compliance is crucial for cardiovascular health.
- Understanding how external pressure affects arterial properties is important for diagnostic accuracy.
Purpose of the Study:
- To quantify the effect of external cuff pressure on arterial volume distensibility.
- To compare this effect in peripheral arteries with differing compliance levels.
Main Methods:
- Thirty healthy subjects were enrolled.
- Arm position was varied (0° and 45°) to alter arterial compliance.
- Photoplethysmography and ECG were used to measure arterial volume distensibility under varying cuff pressures (0-40 mmHg).
Main Results:
- Arterial volume distensibility increased non-linearly with external cuff pressure.
- A greater increase in distensibility was observed in the more compliant artery condition (arm at 45°).
- Significant differences in distensibility changes were noted between arm positions (P < 0.01).
Conclusions:
- External cuff pressure significantly influences peripheral arterial volume distensibility.
- The effect of pressure on distensibility is more pronounced in more compliant arteries.
- Findings underscore the importance of considering arterial compliance and limb position in pressure-based vascular assessments.
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