%0 Journal Article
%@ 1438-8871
%I JMIR Publications
%V 24
%N 12
%P e42359
%T Accuracy and Systematic Biases of Heart Rate Measurements by Consumer-Grade Fitness Trackers in Postoperative Patients: Prospective Clinical Trial
%A Helmer,Philipp
%A Hottenrott,Sebastian
%A Rodemers,Philipp
%A Leppich,Robert
%A Helwich,Maja
%A Pryss,Rüdiger
%A Kranke,Peter
%A Meybohm,Patrick
%A Winkler,Bernd E
%A Sammeth,Michael
%+ Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, Würzburg, 97070, Germany, 49 93120130574, helmer_p@ukw.de
%K health tracker
%K smartwatch
%K internet of things
%K personalized medicine
%K photoplethysmography
%K wearable
%K Garmin Fenix 6 Pro
%K Apple Watch 7
%K Fitbit Sense
%K Withings ScanWatch
%D 2022
%7 30.12.2022
%9 Original Paper
%J J Med Internet Res
%G English
%X Background: Over the recent years, technological advances of wrist-worn fitness trackers heralded a new era in the continuous monitoring of vital signs. So far, these devices have primarily been used for sports. Objective: However, for using these technologies in health care, further validations of the measurement accuracy in hospitalized patients are essential but lacking to date. Methods: We conducted a prospective validation study with 201 patients after moderate to major surgery in a controlled setting to benchmark the accuracy of heart rate measurements in 4 consumer-grade fitness trackers (Apple Watch 7, Garmin Fenix 6 Pro, Withings ScanWatch, and Fitbit Sense) against the clinical gold standard (electrocardiography). Results: All devices exhibited high correlation (r≥0.95; P<.001) and concordance (rc≥0.94) coefficients, with a relative error as low as mean absolute percentage error <5% based on 1630 valid measurements. We identified confounders significantly biasing the measurement accuracy, although not at clinically relevant levels (mean absolute error<5 beats per minute). Conclusions: Consumer-grade fitness trackers appear promising in hospitalized patients for monitoring heart rate. Trial Registration: ClinicalTrials.gov NCT05418881; https://www.clinicaltrials.gov/ct2/show/NCT05418881 
%M 36583938
%R 10.2196/42359
%U https://www.jmir.org/2022/12/e42359
%U https://doi.org/10.2196/42359
%U http://www.ncbi.nlm.nih.gov/pubmed/36583938