Method and apparatus for determining differences between regional CO2 and systemic CO2 measurements
US6216023A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1998 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Dec 22, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/412
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods and apparatus for determining the difference between a regional CO.sub.2 partial pressure of a selected body organ of a mammalian subject, such as the gut, and a systemic CO.sub.2 partial pressure of the subject. The regional CO.sub.2 partial pressure value is tonometrically obtained at body temperature using a gaseous sampling medium. A systemic CO.sub.2 partial pressure value is obtained from the blood. The systemic CO.sub.2 partial pressure value can be that for the body temperature or for a standard temperature. If the systemic CO.sub.2 partial pressure value is that for the body temperature, the regional CO.sub.2 partial pressure value is compared to the systemic CO.sub.2 partial pressure value and the difference therebetween is provided as a CO.sub.2 partial pressure gap measurement. If the systemic CO.sub.2 partial pressure value is that for a standard temperature, one of the regional CO.sub.2 partial pressure value or the systemic CO.sub.2 partial pressure value is corrected for the difference between the body temperature and the standard temperature so that both the partial pressure values comprise CO.sub.2 partial pressure values at a common temperature. The value…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.