Method and device for monitoring human respiration
US5107845A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | May 23, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2503/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for monitoring respiration by illuminating the body of the subject with a luminous flux, where a lens is used to form on a set of photosensitive elements, an image of at least one region of the space within which a person under surveillance is capable of moving, a light source is used for illuminating the area, fine control and readout circuits are connected to the photosensitive elements, an analog to digital converter is to the control circuit, and a microprocessor is used to compare successive signals from the photosensitive elements and which is used to determine any significant variations in the successive signals which are due to respiration of the person being monitored. An alarm is also included which is triggered in response to an absence of variations on successive signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.