CO.sub.2 indicator and the use thereof to evaluate placement of tracheal tubes
US5005572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Jan 31, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a CO.sub.2 detector for the detection of CO.sub.2 in respiratory gases. In particular, the invention relates to medical devices which contain a CO.sub.2 detector disposed within the devices to allow detection of CO.sub.2 within respiratory gases. The invention also relates to a method for determining the proper placement of an intubation device comprising inserting a tracheal tube having a CO.sub.2 detector disposed within, and observing whether the CO.sub.2 detector changes color in response to the CO.sub.2 which is present in respiratory gases. The CO.sub.2 detectors of the invention comprise a pH sensitive dye and a solid phase support. The CO.sub.2 detectors of the invention may further comprise a phase transport enhancer which allows the CO.sub.2 detector to respond contemporaneously with the presence or absence of CO.sub.2 in a respiratory gas on a breath by breath basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.