Apparatus and method for respiratory rate detection and early detection of blood loss volume
US9414753B2 · kind B2 · utility
43Cited by
2References
9Claims
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Key dates
| Filing date | Oct 20, 2010 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Nov 2, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14551
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus and method for non-invasive monitoring and detection of sudden changes in cardiovascular hemodynamics, in which a PPG signal is obtained from a patient, a time-frequency spectrum (TFS) is computed from the PPG signal, instantaneous modulations at a plurality of time points defining a curve of a prominent frequency of oscillation are extracted from the TFS, a peak power spectral density sequence is computed using the instantaneous modulations, and instantaneous peak values for following prominent frequency oscillations are monitored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.