Method and system for extracting cardiac parameters from plethysmographic signals
US8790272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2007 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Jul 12, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7239
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for determining cardiac parameters of a subject includes receiving a signal from a thoracocardiograph (TCG) sensor. The signal is sensitive to positions and/or motions of an anterior chest wall of the subject and include a cardiac component, a respiratory component, and noise and/or artifact components. The method also includes receiving one or more electrocardiogram (ECG) signals and filtering the received TCG signal to limit one or more of the respiratory component and the noise and/or artifact components. The filtering includes one or more of wavelet de-noising, non-linear filtering, and state space filtering. The method further includes ensemble averaging thefiltered TCG signal. Ensemble members are triggered by occurrence of one or more selected fiducial points determined in the ECG signal. Additionally, the method includes extracting parameters of cardiac functioning from the ensemble averaged signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.