A novel depth estimation algorithm of chest compression for feedback of high-quality cardiopulmonary resuscitation based on a smartwatch

Tsung Chien Lu, Yi Chen, Te Wei Ho, Yao Ting Chang, Yi Ting Lee, Yu Siang Wang, Yen Pin Chen, Chia Ming Fu, Wen Chu Chiang, Matthew Huei Ming Ma, Cheng Chung Fang, Feipei Lai, Anne M. Turner

研究成果: ジャーナルへの寄稿学術誌査読

18 被引用数 (Scopus)

抄録

Introduction: High-quality cardiopulmonary resuscitation (CPR) is a key factor affecting cardiac arrest survival. Accurate monitoring and real-time feedback are emphasized to improve CPR quality. The purpose of this study was to develop and validate a novel depth estimation algorithm based on a smartwatch equipped with a built-in accelerometer for feedback instructions during CPR. Methods: For data collection and model building, researchers wore an Android Wear smartwatch and performed chest compression-only CPR on a Resusci Anne QCPR training manikin. We developed an algorithm based on the assumptions that (1) maximal acceleration measured by the smartwatch accelerometer and the chest compression depth (CCD) are positively correlated and (2) the magnitude of acceleration at a specific time point and interval is correlated with its neighboring points. We defined a statistic value M as a function of time and the magnitude of maximal acceleration. We labeled and processed collected data and determined the relationship between M value, compression rate and CCD. We built a model accordingly, and developed a smartwatch app capable of detecting CCD. For validation, researchers wore a smartwatch with the preinstalled app and performed chest compression-only CPR on the manikin at target sessions. We compared the CCD results given by the smartwatch and the reference using the Wilcoxon Signed Rank Test (WSRT), and used Bland-Altman (BA) analysis to assess the agreement between the two methods. Results: We analyzed a total of 3978 compressions that covered the target rate of 80–140/min and CCD of 4–7 cm. WSRT showed that there was no significant difference between the two methods (P = 0.084). By BA analysis the mean of differences was 0.003 and the bias between the two methods was not significant (95% CI: −0.079 to 0.085). Conclusion: Our study indicates that the algorithm developed for estimating CCD based on a smartwatch with a built-in accelerometer is promising. Further studies will be conducted to evaluate its application for CPR training and clinical practice.

本文言語英語
ページ(範囲)60-65
ページ数6
ジャーナルJournal of Biomedical Informatics
87
DOI
出版ステータス出版済み - 11月 2018
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 健康情報学
  • コンピュータ サイエンスの応用

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