Method and apparatus for estimating the time of transit of the arterial pulse from measures obtained in distal zones of the extremities (Machine-translation by Google Translate, not legally binding)

摘要

We propose a method and apparatus to estimate the arterial pulse transit time (ptt) in different arterial segments from measurements made with sensors arranged only in distal areas of the two upper extremities or the two lower extremities. First, the arrival of the pulse wave is detected in an area of the extremities proximal to the torso in the impedance plethysmogram (ipg) measured between the two upper extremities or between the two lower extremities, which reflects changes in areas more proximal with respect to the area where the measuring electrodes are arranged. Second, another time reference is obtained from a pulse signal measured in a distal area with traditional methods. When the first pulse signal is the ipg between the two upper extremities, the second pulse signal may be the ipg between the two lower extremities. The ptt is estimated from the time interval measured between the respective moments of arrival of the pulse wave in the first and in the second signal. (Machine-translation by Google Translate, not legally binding)