Blood pressure measuring apparatus
US5590661A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/022
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
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-…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.