Non-invasive blood pressure measurement apparatus and safety protection method
US7594892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2006 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Nov 30, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0225
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention discloses a non-invasive blood pressure measurement apparatus and a safety protection method. In addition to a main pressure measurement circuit and a main microprocessor circuit, the measurement apparatus also includes an independently disposed assist pressure measurement circuit and an independently disposed assist microprocessor circuit. In normal measurement, the assist microprocessor circuit periodically samples a cuff pressure via the assist pressure measurement circuit, and compares the measured cuff pressure with a specified overpressure protection value, and if the cuff pressure exceeds the specified overpressure protection value, the assist microprocessor circuit outputs a control signal to open a deflation valve until the pressure falls to below the safety pressure. Compared with the prior art, the method for overpressure protection of the present invention is more direct and has higher accuracy of decision, leading to higher reliability of the overpressure protection and higher safety of the measurement apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.