System for conveying gases from and to a subject's trachea and for measuring physiological parameters in vivo
US5193544A · kind A · utility
147Cited by
26References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Jan 31, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/911
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An optical path is provided in the wall of an endotracheal tube to transmit light from a light source to the tracheal tissue. The same path or different path may be used to receive light reflected from the tracheal tissue to a detector for detecting the oxygen saturation of blood of a subject. The light supplied may also be directed across the gaseous medium inside the tube and received by a different optical path. The received light signal is then detected to determine the carbon dioxide concentration of the medium inside the trachea.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.