Blood pressure monitoring apparatus
US5876348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/352
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
During a noninvasive blood pressure measurement using a cuff 2, a pulse wave propagation time T1 from the appearance of the peak value of an R wave in an electrocardiogram (ECG) waveform to the appearance of the bottom value of a pulse wave is counted, and a blood pressure value BP1 is calculated from a count result T1 and parameters .alpha., .beta. specific to a subject obtained during a pulse wave propagation time calibration. Then, the absolute value of a difference between the blood pressure value BP1 and a blood pressure value NIBP1 obtained by the noninvasive blood pressure measurement using the cuff 2 is calculated, and it is indeed whether or not the calculated absolute value is within a predetermined threshold.sub.-- BP. If the absolute value is judged to exceed the threshold.sub.-- BP, then blood pressure is measured again noninvasively using the cuff 2, and a blood pressure value NIBP1'obtained from such repeated measurement is displayed on a display 22.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.