The method of linear inflation control in Ambulatory Blood Pressure measurement at finger

In 24-hour Non-invasive Blood Pressure (NIBP) measurement, most of the automatic devices use oscillometric method. Accurate measurement of BP at finger using an Oscillometric Waveform (OMW) remains a challenge, particularly when the waveform is collected in inflation, because of the bad signal-to-noise ratio. In the present work, we aimed at measuring Ambulatory Blood Pressure by extracting OMW signal at finger with a new method of linear inflation control and digital signal processing. With the PID control of the pump and real time signal processing, we implemented the blood pressure measurement system and new algorithm. For the validation of our suggested method, we compare the effect of our method and traditional method. Finally, the method is validated in a pilot study against Welch Allyn ProBP 3400 BP monitors.