Method and apparatus for in vivo blood gas analysis
US3983864A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Jul 7, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/255
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Method and apparatus for withdrawing and analyzing gases dissolved in liquid, more specifically, equilibrated blood gas samples in vivo. A catheter including a semipermeable membrane, connected to include a volume of carrier gas at atmospheric pressure, is introduced percutaneousluy into the bloodstream. After a predetermined period, equilibratin occurs between the blood gases and the carrier gas. By means of displacement in the volume or reduction in the pressure, the carrier gas including the equilibrated gas is then removed from the semipermeable membrane to another area for analysis. A corresponding volume of carrier gas is replaced in the semipermeable membrane from an inlet supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.