Key result
Novel piezoelectric pulse wave sensor reliably captures arterial pressure waveforms and heart period variability.
Why the study?
Arterial blood pressure wave monitoring is important for cardiovascular assessment, but novel inexpensive sensors for this purpose are needed.
A novel, inexpensive piezoelectric arterial pressure wave sensor can reliably detect pulse waveforms and heart period variability across different physiological states.
May enable low-cost pulse waveform monitoring; leaves open prospective clinical validation before adoption.
Arterial Blood Pressure wave monitoring is considered to be important in assessment of cardiovascular system. We developed a novel pulse wave detection system using low frequency specific piezoelectric material as pressure wave sensor. The transducer detects the periodic change in the arterial wall diameter produced by pressure wave and the amplified signal after integration represents the pressure wave. The signal before integration is proportional to the rate of change of pressure wave and it not only reproduces the pressure waveform faithfully, but also its sharper nature helps to reliably detect the heart period variability (HPV). We have studied the position-specific (e.g. over carotid or radial artery) nature of change of this pulse wave signal (shape and amplitude) and also the changes at different physiological states.
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Sur et al. (2005) studied Cardiovascular system assessment. Novel pulse wave detection system using low frequency specific piezoelectric material was evaluated on Detection of arterial blood pressure wave and heart period variability. A novel pulse wave detection system using a low-frequency specific piezoelectric material successfully reproduced pressure waveforms and reliably detected heart period variability.
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