Key result
An ultra-small blood pressure measuring device using two photoplethysmographies maintained a measurement error of 5% compared to an air-pressurized automatic device.
Why the study?
Small wrist-type BP measurement devices using simple sensors lack accuracy and require personal user data input, motivating development of a PPG-only algorithm for BP estimation.
Does a blood pressure estimation algorithm using two PPGs without ECG accurately measure blood pressure compared to an air-pressurized automatic device?
Does a blood pressure estimation algorithm using two PPGs without ECG accurately measure blood pressure compared to an air-pressurized automatic device?
Answers are grounded in this paper and cite their sources.
A novel algorithm using only two PPG sensors can estimate blood pressure with a stable 5% error compared to standard automatic cuffs, enabling the development of miniaturized BP devices.
Though small wrist-type blood pressure (BP) measurement devices using simple sensors have recently been developed, they lack accuracy and require the input of personal user data. To miniaturize BP measurement devices, this study proposes the use of algorithms that can calculate BP using sensors that utilize only two photoplethysmographies (PPGs), without the need for electrocardiograms. To reduce the error of indirect BP measurement, specific values representing individual blood vessel conditions are improved via the application of an algorithm developed using mean arterial pressure and PPG phase difference. To reduce the error that occurs when measuring BP using PPG, a specific value algorithm used to develop a miniaturized BP measuring device using two PPGs is proposed along with a new model. The developed ultra-small PPG measuring device uses a reflective photoplethysmography measurement circuit. This is presented as a PPG-only model that deviates from the method of additionally linking existing electrocardiography (ECG). The measurement device developed in this study is compared with the air-pressurized automatic BP measurement device in terms of the BP measurement value; the result of maintaining the error stably at 5% is derived to prove the superiority of the algorithm.
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Kim et al. (2020) studied Blood pressure measurement. Ultra-small measuring device with a specific value algorithm using two photoplethysmographies (PPGs) vs. Air-pressurized automatic BP measurement device was evaluated on Blood pressure measurement error. An ultra-small blood pressure measuring device using two photoplethysmographies maintained a measurement error of 5% compared to an air-pressurized automatic device.
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