A pulse wave monitoring system based on a respiratory pacemaker

We constructed a reasonable healthcare monitoring system with pulse wave and respiratory analysis to assess blood vessel conditions and the autonomic function in daily life. Filter circuits with an infrared sensor were carefully designed to complete the peripheral pulse wave measurement and analysis, considering individual differences to a pulse sensor and the potential for the system to be used as wearable devices and applications. The analyzer for our system is capable of predicting arterial states and stiffness. A user interface with a respiratory pacemaker can assist voluntary breathing, visualize pulse wave features, and regulate them in real time. The user interface software is widely compatible and could be easily applied to mobile healthcare devices. We also evaluated how respiration control reflected pulse rate variability [i.e., fluctuations in peak - to - peak intervals (PPI)] associated with the autonomic nervous system. An experimental study under various breathing rates was performed using the created user interface with a respiratory pacemaker. The transfer gain of the PPI caused resonance at the respiratory rate of 0.1 Hz ( p