| 摘要 |
A blood pressure measuring apparatus including a surface-pressure sensor having a pressure sensing element in a press surface thereof to detect a pressure at the press surface pressed on subject's body surface and generate a pressure signal representing the detected surface pressure, the pressure signal containing successive pulses representing a pressure pulse wave produced from subject's artery, a pressing device which presses the sensor against the artery via the body surface, a control device which changes the pressing force of the pressing device applied to the sensor, to partially flatten the artery, and obtains the successive pulses of the pressure signal during the changing of the pressing force, a first determining device for determining, in a two-dimensional orthogonal coordinate system, a first straight line approximating a level portion of (a) an upper-peak curve connecting respective upper-peak magnitudes of the successive pulses of the pressure signal and/or (b) a lower-peak curve connecting respective lower-peak magnitudes of the successive pulses, a second determining device for determining a second straight line approximating an increasing portion of (a) the upper-peak curve and/or (b) the lower-peak curve, and a blood pressure determining device for determining a systolic and/or a diastolic blood pressure of the subject based on an intersecting point of the first and second straight lines.
|
