Patent ID: 7069791
Filing Date: 2006-07-04
Classification: A61B

Abstract:
1. An array-type capacitive pressure pulse wave sensor for measuring a waveform indicating a change in arterial pressure by pressing a surface of a living body, comprising: m rows (m is a natural number of more than 1) of first electrodes arranged in parallel with each other to extend substantially linearly in a direction approximately orthogonal to an extending direction of an artery at the time of measurement; n columns (n is a natural number of more than 1) of second electrodes arranged in parallel with each other, at a prescribed distance from said m first electrodes, to extend in a direction crossing the extending direction of said m first electrodes; and m×n capacitive elements formed at intersections of said m first electrodes and said n second electrodes; said m×n capacitive elements being arranged in a staggered manner when seen in two dimensions, wherein each of said n second electrodes has a bent portion provided at a part of said second electrode located between the neighboring two first electrodes and not overlapping either of said neighboring first electrodes, the bent portion being bent in a direction crossing the extending direction of the artery.