Automatic blood pressure measuring device
US4972840A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1990 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Jan 11, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0235
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for determining mean blood pressure involves the use of a pre-programmed microprocessor which interprets pressure oscillation values from a pressure cuff affixed to a subject's limb. The pressure cuff is inflated to a value above apparent systolic pressure and then deflated in steps. The steps are all substantially equal mmHg declinations in cuff pressure. At each step cuff ocsillation values are taken and stored. The greatest cuff oscillation and its associated cuff pressure are noted, along with the next greatest cuff oscillations and associated cuff pressures on either side of the greatest oscillation. The actual mean blood pressure is then determined by forming a window adjacent to the greatest oscillation and calculating, on which side of the greatest oscilation, within the window, the mean pressure is disposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.