Evaluation scale to assess the accuracy of cuff-less blood pressure measuring devices

Abstract

This study focused on the statistical aspect of establishing standard to assess the accuracy of cuff-less BP measuring devices. The results of our study on the validation reports of various cuff-based devices and an experimental study on a cuff-less device showed that the t4 distribution is better than the normal distribution in portraying the underlying error distribution of both kinds of devices. Moreover, based on both the theoretical and experimental studies, mean absolute difference or mean absolute percentage difference is recommended as continuous scale to assess the accuracy of cuff-less devices for their own distinctive advantages.

Unobtrusive Sensing and Wearable Devices for Health Informatics

“…For example, there are three well-known standards for assessing the accuracy of cuffbased BP measurement devices, i.e., the American Association for the Advancement of Medical Instrumentation (AAMI), the British Hypertension Society (BHS), and the European Society of Hypertension (ESH). On the other hand, Zhang's team has been spear-headed a standard for cuffless BP devices [97]. In this work, a new distribution model of the measuring difference between the test and the reference device was proposed.…”

“…The proposed error distribution model was further validated by the goodness-of-fit of 999 datasets obtained from 85 subjects by a PTT-based cuffless BP estimation method to the hypothesized distribution. In addition, this study also proposed new evaluation scales under general t distribution to assess the accuracy of cuffless BP devices, including: mean absolute difference (MAD), root mean square difference (RMSD) and mean absolute percentage difference (MAPD) as shown in ( 5) and ( 6) [97] MAD…”

Continuous Blood Pressure Measurement From Invasive to Unobtrusive: Celebration of 200th Birth Anniversary of Carl Ludwig

“…Thus, the standardized characterization of these new BP measurement approaches are required with an increase in market interest. This has been addressed by IEEE 1708, the standard for wearable cuffless BP measurement devices, which has highlighted the performance evaluation and calibration issue for cuffless devices [107,108].…”

Health informatics for low-cost and high-quality health care

“…For example, new cuffless blood pressure measurement devices often involve an individualised calibration procedure that is not required in traditional cuff-based blood pressure devices. New protocol designs should therefore be designed to evaluate cuffless devices [13].…”