Apparatus for monitoring activity level of human organ
US4823804A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 15, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Oct 15, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7225
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for monitoring the activity level of an organ of the human body. The apparatus processes digital values recorded in the memory of a processor. These digital values correspond to the analog values of a differential signal supplied after amplification and filtration of activity signals supplied by sensors. The memory contains a program for processing the digital values by sampling during each period of a succession of periods shifted by a predetermined time interval. The program controls the calculation of the Fourier transform of these values during each period. The frequency spectrum of the input signal is obtained during each interval. During each interval the processor detects the peak of the spectrum relative to the organ to be studied, as well as the amplitude maximum of that peak. The processor supplies a signal representing the evolution of the maxima of the peaks for all the time intervals. This signal is characteristic of the activity level of the organ to be studied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.