Flexible Multiparameter System for Acute Hypertension Monitoring

This article proposes a wearable system for rapid response during acute hypertension. The system consists of a flexible electrode patch and a signal acquisition module, which is designed for real-time monitoring of photoelectric volume pulse graph (PPG), electrocardiogram (ECG), and bioelectrical impedance (Bio-Z). The flexible patch and miniaturized signal acquisition module provide comfort to the users while maintaining stable contact with human chest skin, and successfully collects three physiological signals, demonstrating its potential application in the healthcare field. In addition, this article introduces a lightweight and effective method based on PPG signal trend components for acute hypertension monitoring, whose effectiveness is verified with animal experiments. As a result, the system reveals a response time of less than 10 s. For the blood pressure rising stage, a mean absolute error (MAE) of 3.34 mmHg between the PPG-based value and the average blood pressure is achieved. For the blood pressure declining stage, an MAE of 2.42 mmHg between the PPG-based value and the average blood pressure is achieved. The results demonstrate a strong correlation between the PPG signal trend components and the blood pressure during acute hypertension monitoring.