Apparatus and method for monitoring the waveform of cyclic movement within the thorax of an individual
US4967751A · kind A · utility
17Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 4, 1988 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | May 4, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A carrier-frequency signal transmitted through the individual's thorax from a first module to a second module, is modulated at the second module and retransmitted back through the individual's thorax to the first module. An attribute (e.g., doppler frequency shift or amplitude variation) of solely the modulation component of the signal received by the first module is employed to monitor the waveform of cyclic movement (e.g., breathing rate) within the individual's thorax.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.