Noninvasive method and apparatus for measuring blood pressure by determining a maximum frequency of spectral content of the second heart sound
US8202225B2 · kind B2 · utility
0Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 20, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B7/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods and apparatus for noninvasively estimating a blood pressure are provided. A bandpass filter is applied to a second heart sound (S2) component to generate a filtered S2 component. The bandpass filter has a lower cutoff frequency greater than a maximum frequency of the S2 component. The maximum frequency of the S2 component is estimated using the filtered S2 component, a predetermined relationship is applied between the estimated maximum frequency and blood pressure to generate a blood pressure estimate and the blood pressure estimate is displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.