Key result
The BioWatch wrist-based system estimated continuous blood pressure with an average RMSE of 7.83 to 9.37 mmHg for systolic BP and 5.77 to 6.90 mmHg for diastolic BP across 11 subjects.
Why the study?
Does the BioWatch wrist-based system accurately measure continuous blood pressure in human subjects?
Does the BioWatch wrist-based system accurately measure continuous blood pressure in human subjects?
The BioWatch wrist-based system demonstrates feasibility for continuous noninvasive blood pressure monitoring with reasonable accuracy when trained for specific postures and individuals.
Wrist-based BP estimation shows moderate accuracy in small cohort; leaves open clinical utility pending larger validation trials.
Noninvasive continuous blood pressure (BP) monitoring is not yet practically available for daily use. Challenges include making the system easily wearable, reducing noise level and improving accuracy. Variations in each person's physical characteristics, as well as the possibility of different postures, increase the complexity of continuous BP monitoring, especially outside the hospital. This study attempts to provide an easily wearable solution and proposes training to specific posture and individual for further improving accuracy. The wrist watch-based system we developed can measure electrocardiogram and photoplethysmogram. From these two signals, we measure pulse transit time through which we can obtain systolic and diastolic blood pressure through regression techniques. In this study, we investigate various functions to perform the training to obtain blood pressure. We validate measurements on different postures and subjects, and show the value of training the device to each posture and each subject. We observed that the average RMSE between the measured actual systolic BP and calculated systolic BP is between 7.83 to 9.37 mmHg across 11 subjects. The corresponding range of error for diastolic BP is 5.77 to 6.90 mmHg. The system can also automatically detect the arm position of the user using an accelerometer with an average accuracy of 98%, to make sure that the sensor is kept at the proper height. This system, called BioWatch, can potentially be a unified solution for heart rate, SPO2 and continuous BP monitoring.
No takes yet. Share an insight, caveat, or question.
Thomas et al. (2015) studied this question. BioWatch wrist-based blood pressure monitor vs. Actual blood pressure measurements was evaluated on Average RMSE between measured actual BP and calculated BP (RMSE 7.83 to 9.37 mmHg (systolic), 5.77 to 6.90 mmHg (diastolic)). The BioWatch wrist-based system estimated continuous blood pressure with an average RMSE of 7.83 to 9.37 mmHg for systolic BP and 5.77 to 6.90 mmHg for diastolic BP across 11 subjects.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: