光電容積脈波による連続血圧推定における血流の流量と抵抗指標を用いた精度向上方式の提案と評価

カテゴリ: 論文誌(論文単位)

グループ名: 【E】センサ・マイクロマシン部門

発行日: 2021/06/01

タイトル(英語): A Proposal and Evaluation of a New Method Incorporating Indicators of Blood Flow and Resistance to Improve the Accuracy of Continuous Blood Pressure Estimation Using PPG

著者名: 川上　健（北海道大学 大学院 情報科学研究科／東芝デバイス&ストレージ(株)／(株)東芝），住友　和弘（東北医科薬科大学），菅野　厚博（東北医科薬科大学），小川　貴弘（北海道大学 大学院 情報科学研究科），南　重信（(株)ミルウス），長谷山　美紀（北海道大学 大学院 情報科学研究科）

著者名(英語): Ken Kawakami (Faculty of Information Science and Technology, Hokkaido University/Toshiba Electronic Devices & Storage/Toshiba Corporation), Kazuhiro Sumitomo (Tohoku Medical and Pharmaceutical University), Atsuhiro Kanno (Tohoku Medical and Pharmaceutical

キーワード: 光電容積脈波，カフレス連続血圧推定，末梢血管弾性率，流量指標，抵抗指標　　PPG (Photoplethysmogram)，Cuff-Less and continuous blood pressure estimation，peripheral arterial elasticity，indicators of blood flows，indicators of blood flow resistances

要約(英語): This paper presents a new method which achieves accuracy like cuff-based BP (Blood pressure) measurement to improve the conventional cuff-less BP estimation method for a wrist-type single PPG sensor. The conventional method used the modified normalized pulse volume and the pulse rate for resistance and flow rate respectively to express BP. However, it is required to improve the performance in comparison with methods based on pulse wave velocity which involve elasticity rate relating to vascular pressure. The new method incorporates both resistance which is derived from relative velocity and peripheral arterial elasticity based on vascular function to elevate the accuracy of diastolic BP estimation. Systolic BP is also improved by the sum of estimated pulse pressure with resistance and the estimated diastolic BP value. The accuracy comparison between the conventional and proposal method was performed by cross validation for estimated BP values in 5 seconds each by using wrist-type PPG signals. It is found that the estimated SBP and DBP of the conventional method differed from the reference BP by 3.9 (mean absolute error) ±12 (standard deviation) mmHg and 4.7 ± 11 mmHg respectively. In the proposal method, the differences of estimated values are 2.5 ± 7.2 mmHg and 2.7 ± 7.8 mmHg. When compared to the AAMI requirement (5 ± 8 mmHg for both SBP and DBP estimation), the results suggest that the proposed method has great potential for a single PPG sensor device.

本誌: 電気学会論文誌E（センサ・マイクロマシン部門誌） Vol.141 No.6 （2021）

本誌掲載ページ: 186-196 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejsmas/141/6/141_186/_article/-char/ja/