Apparatus and method for determining respiratory effort from muscle tremor information in ECG signals
US5913308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1996 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1101
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for determining the respiratory effort of a patient is disclosed. The apparatus includes a device for acquiring electrocardiographic (ECG) signal (e.g., conventional electrocardiogram (ECG) signal) that contains pure cardiac signal and respiratory muscle tremor (RMT) signal. The apparatus also includes a processor for processing the ECG signal. The processor includes a filter to filter the ECG signal for reducing the cardiac signal, a device for determining a waveform representing the magnitude of the oscillations in the filtered ECG signal, and a mechanism for smoothing spikes in the waveform. The resulting waveform is related to the respiratory muscle tremor, which is related to the respiratory effort. The estimation of the respiratory effort is derived entirely from the ECG signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.