Bilateral simultaneous doppler measurement of segmented sphygmomanometry
US6740042B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Sep 5, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method for simultaneous, bilateral, segmental blood pressure measurement are disclosed. In one illustrative embodiment of the invention, two Doppler modules are configured to operate at nominally the same Doppler carrier frequency so that they probe for substantially the same range of physiological information. However, the Doppler carrier frequencies for the Doppler modules are also sufficiently different to substantially avoid interference between the two modules. A phase-locked loop (PLL) used to demodulate the velocity signals in each Doppler module efficiently blocks interference signals because they have frequencies that are the difference in the Doppler carrier frequencies and that are outside the locking range of the PLL. Broad-band RF amplifiers and Doppler transducers are used to ensure that the frequency responses of the Doppler modules are substantially the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.