Systolic pressure determining apparatus and process using integration to determine pulse amplitude
US4140110A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1976 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Dec 27, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7239
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In systolic pressure determining apparatus utilizing a pressure cuff and means for measuring a fluctuating quantity proportional to the sum of the cuff pressure and the fluctuating component proportioned to the pulsatile blood pressure, and including means for determining the maximum value of the fluctuating component as cuff pressure is varied, the improvement comprising means for converting the quantity into a representation of a time derivative of the fluctuating component means for obtaining the time integral of the time derivative over an interval of predetermined limits between initiation of systolic rise and systolic peak in each blood pressure pulse, and means extending the time integral, as a measure of pulse pressure amplitude, to the maximum value determining means. Specifically, certain crossings of a reference value by the time derivative are recognized as being the initiation of systolic rise and the systolic peak respectively, and the integration occurs over this interval. The method implemented by the improved means also comprises an aspect of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.