Method and device for estimating the transit time of the arterial pulse from measurements obtained in distal zones of the extremities
A technology of pulse transit time and area, applied in the measurement of pulse rate/heart rate, diagnostic recording/measurement, sensors, etc., can solve the problems of complex changes in plethysmography, and achieve reliable measurement results
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[0037] exist figure 1 In a first embodiment of the invention shown, the PTT of the arm is measured by a system integrated in a hand-held device (1) comprising two pairs of electrodes (2) connected to The index finger of each hand of the subject is in contact with the middle finger, and the PPG sensor (3) is in contact with the ring finger of the arm to be examined.
[0038] The IPG signal between the two upper extremities is measured by the excitation system (4) and the analog processing system (5), which injects a high-frequency current, which passes through the upper chest of the subject under test in one hand. The index finger cycles between the index fingers of the other hand, and the analog processing system (5) takes measurements between the middle finger of one hand and the middle finger of the other hand.
[0039] The digital processing module (6) then detects the end (foot) of the IPG wave measured between the two hands and the end (foot) of the PPG wave measured on ...
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