Wearable Physiological Multi-Vital Sign Monitoring System With Medical Standard

Abstract

In recent years, due to increased attention of individual physical health condition, the demand on portable multi-vital signs monitoring devices has shown an explosive growth. This work designed a portable, multi-vital signs monitoring system, consisting of chest unit and wrist unit, with size of 32 mm <inline-formula> <tex-math notation="LaTeX">$\times32$ </tex-math></inline-formula> mm and diameter of 30 mm, respectively. The designed system is capable of transmitting measured electrocardiograph (ECG), pulse wave and body temperature signal to the mobile devices wirelessly by Bluetooth low energy (BLE) technique. The heart rate, pulse oximetry (SpO₂) and respiratory rate are extracted through time domain algorithm. The chest and wrist units can continuously monitor body vital signs for more than 12 and 24 hours, respectively. Besides, the experiment results reveal that the chest unit is able to monitor patients with heart rate abnormalities such as atrial fibrillation and premature beats. The typical heart diseases can be detected in real-time. Meanwhile, the wrist unit clearly detects the changes of the physical parameters of the subjects under different physiological conditions. The accuracy of the designed system is consistent with that of the commercial medical instrument counterpart, with further advantages of compact, portable and patient-friendly natures.