Telemed J E Health - A new chest compression depth feedback algorithm for high-quality CPR based on smartphone.

Tópicos

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Resumo

CKGROUND: Although many smartphone application (app) programs provide education and guidance for basic life support, they do not commonly provide feedback on the chest compression depth (CCD) and rate. The validation of its accuracy has not been reported to date. This study was a feasibility assessment of use of the smartphone as a CCD feedback device. In this study, we proposed the concept of a new real-time CCD estimation algorithm using a smartphone and evaluated the accuracy of the algorithm.MATERIALS AND METHODS: Using the double integration of the acceleration signal, which was obtained from the accelerometer in the smartphone, we estimated the CCD in real time. Based on its periodicity, we removed the bias error from the accelerometer. To evaluate this instrument's accuracy, we used a potentiometer as the reference depth measurement. The evaluation experiments included three levels of CCD (insufficient, adequate, and excessive) and four types of grasping orientations with various compression directions. We used the difference between the reference measurement and the estimated depth as the error. The error was calculated for each compression.RESULTS: When chest compressions were performed with adequate depth for the patient who was lying on a flat floor, the mean (standard deviation) of the errors was 1.43 (1.00) mm. When the patient was lying on an oblique floor, the mean (standard deviation) of the errors was 3.13 (1.88) mm.CONCLUSIONS: The error of the CCD estimation was tolerable for the algorithm to be used in the smartphone-based CCD feedback app to compress more than 51mm, which is the 2010 American Heart Association guideline.

Resumo Limpo

ckground although mani smartphon applic app program provid educ guidanc basic life support common provid feedback chest compress depth ccd rate valid accuraci report date studi feasibl assess use smartphon ccd feedback devic studi propos concept new realtim ccd estim algorithm use smartphon evalu accuraci algorithmmateri method use doubl integr acceler signal obtain acceleromet smartphon estim ccd real time base period remov bias error acceleromet evalu instrument accuraci use potentiomet refer depth measur evalu experi includ three level ccd insuffici adequ excess four type grasp orient various compress direct use differ refer measur estim depth error error calcul compressionresult chest compress perform adequ depth patient lie flat floor mean standard deviat error mm patient lie obliqu floor mean standard deviat error mmconclus error ccd estim toler algorithm use smartphonebas ccd feedback app compress mm american heart associ guidelin

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