Accurate Blood Pressure Estimation During Activities of Daily Living: A Wearable Cuffless Solution.
IEEE J Biomed Health Inform
; 25(7): 2510-2520, 2021 07.
Article
em En
| MEDLINE
| ID: mdl-33497346
ABSTRACT
The objective is to develop a cuffless method that accurately estimates blood pressure (BP) during activities of daily living. User-specific nonlinear autoregressive models with exogenous inputs (NARX) are implemented using artificial neural networks to estimate the BP waveforms from electrocardiography and photoplethysmography signals. To broaden the range of BP in the training data, subjects followed a short procedure consisting of sitting, standing, walking, Valsalva maneuvers, and static handgrip exercises. The procedure was performed before and after a six-hour testing phase wherein five participants went about their normal daily living activities. Data were further collected at a four-month time point for two participants and again at six months for one of the two. The performance of three different NARX models was compared with three pulse arrival time (PAT) models. The NARX models demonstrate superior accuracy and correlation with "ground truth" systolic and diastolic BP measures compared to the PAT models and a clear advantage in estimating the large range of BP. Preliminary results show that the NARX models can accurately estimate BP even months apart from the training. Preliminary testing suggests that it is robust against variabilities due to sensor placement. This establishes a method for cuffless BP estimation during activities of daily living that can be used for continuous monitoring and acute hypotension and hypertension detection.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Atividades Cotidianas
/
Dispositivos Eletrônicos Vestíveis
Limite:
Humans
Idioma:
En
Revista:
IEEE J Biomed Health Inform
Ano de publicação:
2021
Tipo de documento:
Article