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Accuracy and Systematic Biases of Heart Rate Measurements by Consumer-Grade Fitness Trackers in Postoperative Patients: a prospective clinical trial
Philipp Helmer;
Sebastian Hottenrott;
Philipp Rodemers;
Robert Leppich;
Maja Helwich;
Rüdiger Pryss;
Peter Kranke;
Patrick Meybohm;
Bernd Winkler;
Michael Sammeth
ABSTRACT
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 healthcare, further validations of the measurement accuracy in hospitalised patients are essential but lacking to date.
Methods:
We therefore conducted a prospective validation study in 201 patients after moderate to major surgery in a controlled setting to benchmark the accuracy of heart rate measurements in four consumer-grade fitness trackers (Apple Watch 7, Garmin Fenix 6 pro, Withings ScanWatch, Fitbit Sense) against the clinical gold standard (ECG).
Results:
All devices exhibited high correlation (r≥0.95; P<.001) and concordance (rc≥0.94) coefficients, with a relative error as low as MAPE<5% based on 1630 valid measurements. We identified confounders significantly biassing the measurement accuracy, although, not at clinically relevant levels (MAE<5bpm).
Conclusions:
In conclusion, consumer-grade fitness trackers appear promising in hospitalised patients for monitoring heart rate. Clinical Trial: clinicaltrials.org (accession no. NCT05418881)
Citation
Please cite as:
Helmer P, Hottenrott S, Rodemers P, Leppich R, Helwich M, Pryss R, Kranke P, Meybohm P, Winkler B, Sammeth M
Accuracy and Systematic Biases of Heart Rate Measurements by Consumer-Grade Fitness Trackers in Postoperative Patients: Prospective Clinical Trial