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Changes of oscillogram envelope maximum with blood pressure and aging: a quantitative observation
Fan Pan1,2, Peiyu He1, Yongjun Qian2
1College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, People's Republic of China.
Physiological Measurement
|November 14, 2022
Summary
Blood pressure and aging significantly impact oscillometric blood pressure (BP) measurement accuracy. The oscillogram envelope maximum increases with higher BP and older age, affecting BP readings.
Area of Science:
- Biomedical Engineering
- Cardiovascular Physiology
- Medical Instrumentation
Background:
- Oscillometric blood pressure (BP) measurement relies on analyzing the cuff pressure waveform (oscillogram) envelope.
- The maximum of the oscillogram envelope is a critical factor influencing BP measurement accuracy.
- Understanding factors affecting the oscillogram envelope maximum is essential for improving BP monitoring.
Purpose of the Study:
- To quantitatively investigate the influence of blood pressure (BP) and aging on the oscillogram envelope maximum.
- To determine if age moderates the relationship between BP and the oscillogram envelope maximum.
Main Methods:
- Recruited 462 subjects (214 female, 248 male).
- Digitally recorded cuff pressure during linear deflation to derive oscillogram envelopes and their maximums.
- Employed moderation analysis, dividing subjects into age and BP categories for comparison.
Main Results:
- Age significantly moderated the relationship between BP and the oscillogram envelope maximum (P < 0.05).
- Oscillogram envelope maximums increased significantly with higher BP levels (P < 0.05 between groups).
- Envelope maximums also increased significantly with aging, particularly in groups over 60 years old compared to younger groups (P < 0.05).
Conclusions:
- Both blood pressure and aging are significant factors influencing the maximum value of the oscillogram envelope.
- These findings provide empirical and theoretical insights into oscillometric BP measurement variability.
- Highlights the need to consider patient age and BP in the interpretation of oscillometric readings.
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