TY  - JOUR
AU  - Helmer, Philipp
AU  - Hottenrott, Sebastian
AU  - Rodemers, Philipp
AU  - Leppich, Robert
AU  - Helwich, Maja
AU  - Pryss, Rüdiger
AU  - Kranke, Peter
AU  - Meybohm, Patrick
AU  - Winkler, Bernd E
AU  - Sammeth, Michael
PY  - 2022
DA  - 2022/12/30
TI  - Accuracy and Systematic Biases of Heart Rate Measurements by Consumer-Grade Fitness Trackers in Postoperative Patients: Prospective Clinical Trial
JO  - J Med Internet Res
SP  - e42359
VL  - 24
IS  - 12
KW  - health tracker
KW  - smartwatch
KW  - internet of things
KW  - personalized medicine
KW  - photoplethysmography
KW  - wearable
KW  - Garmin Fenix 6 Pro
KW  - Apple Watch 7
KW  - Fitbit Sense
KW  - Withings ScanWatch
AB  - 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 
SN  - 1438-8871
UR  - https://www.jmir.org/2022/12/e42359
UR  - https://doi.org/10.2196/42359
UR  - http://www.ncbi.nlm.nih.gov/pubmed/36583938
DO  - 10.2196/42359
ID  - info:doi/10.2196/42359
ER  -