Apparatus, software, and methods for cardiac pulse detection using a piezoelectric sensor
US8160703B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2005 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Apr 5, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Signal data obtained from a piezoelectric sensor placed on a patient's body is used to detect the presence of a cardiac pulse. The piezoelectric sensor has a transducing element adapted to sense movement due to a cardiac pulse and produce piezoelectric signal data in response thereto. Processing circuitry analyzes the piezoelectric signal data for a feature indicative of a cardiac pulse and determines whether a cardiac pulse is present in the patient based on the feature. In one aspect, the feature may be a temporal feature such as a relative change in energy. In another aspect, the feature may be a spectral feature such as the energy or frequency of a peak in the energy spectrum of the signal. In yet another aspect, the feature may be obtained by comparing the piezoelectric signal data with a previously-identified pattern known to predict the presence of a cardiac pulse. Multiple features may also be obtained from the piezoelectric signal data and classified to determine the presence of a cardiac pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.