A chair-type system using instantaneous phase difference (IPD) estimated more accurate blood pressure readings compared to pulse transit time (PTT), demonstrating the possibility of nonintrusive monitoring.
Does a chair-based cuffless blood pressure monitoring system using instantaneous phase difference improve blood pressure estimation accuracy compared to pulse transit time?
A novel chair-based cuffless blood pressure monitoring system using instantaneous phase difference provides more accurate blood pressure estimation than traditional pulse transit time methods.
Hypertension is a well-known chronic disease that causes complications such as cardiovascular diseases or stroke, and thus needs to be continuously managed by using a simple system for measuring blood pressure. The existing method for measuring blood pressure uses a wrapping cuff, which makes measuring difficult for patients. To address this problem, cuffless blood pressure measurement methods that detect the peak pressure via signals measured using photoplethysmogram (PPG) and electrocardiogram (ECG) sensors and use it to calculate the pulse transit time (PTT) or pulse wave velocity (PWV) have been studied. However, a drawback of these methods is that a user must be able to recognize and establish contact with the sensor. Furthermore, the peak of the PPG or ECG cannot be detected if the signal quality drops, leading to a decrease in accuracy. In this study, a chair-type system that can monitor blood pressure using polyvinylidene fluoride (PVDF) films in a nonintrusive manner to users was developed. The proposed method also uses instantaneous phase difference (IPD) instead of PTT as the feature value for estimating blood pressure. Experiments were conducted using a blood pressure estimation model created via an artificial neural network (ANN), which showed that IPD could estimate more accurate readings of blood pressure compared to PTT, thus demonstrating the possibility of a nonintrusive blood pressure monitoring system.
Lee et al. (Thu,) conducted a other in Hypertension. Chair-type blood pressure monitoring system using instantaneous phase difference (IPD) vs. Pulse transit time (PTT) based estimation was evaluated on Blood pressure estimation accuracy. A chair-type system using instantaneous phase difference (IPD) estimated more accurate blood pressure readings compared to pulse transit time (PTT), demonstrating the possibility of nonintrusive monitoring.
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