Key result
A novel approach using single-site photoplethysmograph signals to determine blood pressure yielded a mean error magnitude of 2.12 ± 1.79 mmHg for diastolic blood pressure.
Why the study?
Blood pressure measurement via photoplethysmography often requires two separate signals, such as ECG and PPG, prompting the need for an approach using a single PPG signal.
Can arterial blood pressure be accurately measured using only a single-site photoplethysmograph (PPG) signal?
Can arterial blood pressure be accurately measured using only a single-site photoplethysmograph (PPG) signal?
Answers are grounded in this paper and cite their sources.
A novel approach using single-site PPG signal acquisition demonstrates feasibility for cuffless blood pressure measurement with low error margins for diastolic blood pressure.
Measurement of blood pressure (BP) from photoplethysmograph (PPG) signal has been investigated by several researchers in recent years. Use of PPG signal for BP measurement has advantages over conventional cuff-based sphygmomanometric methods. Signals from two different measurement instruments, such as electrocardiogram (ECG) and photoplethysmogram, are mostly used to determine BP. In this article, a novel approach for determining BP by measurement of only one signal, viz., PPG, is presented. Two specific methods have been discussed for determining mean arterial blood pressure (MABP), systolic blood pressure (SBP), and diastolic blood pressure (DBP). The first method, presented in Section III , needs an initial value of BP while the second method uses a learning-based nonparametric regression technique. PPG signals from more than 150 volunteers have been used to assess the BP. Mean and standard deviation of error magnitudes in measuring DBP is 2.12 ± 1.79 mmHg.
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Chakraborty et al. (2020) studied this question. Single-site photoplethysmograph (PPG) signal was evaluated on Error magnitudes in measuring diastolic blood pressure (DBP). A novel approach using single-site photoplethysmograph signals to determine blood pressure yielded a mean error magnitude of 2.12 ± 1.79 mmHg for diastolic blood pressure.
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