Apparatus for the determination of the partial pressure of gases dissolved in a fluid

US5058416A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Harald Engelhardt · Aachen, DE
• Guenter Rau · Aachen, DE
• Helmut Reul · St. Blasien, DE

Key dates

• Filing date: Jan 5, 1989
• Grant date: Oct 22, 1991
• Expiry date: Jan 5, 2009

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B5/14528
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An apparatus for determining the partial pressure of a gas dissolved in a fluid which includes a catheter consisting of a double bored coaxial catheter having an outer tube and a spaced coaxial inner tube, the outer tube being permeable to the gas being measured, together with a pump for delivering a continuous flow of a carrier fluid into the space between the inner tube and the outer tube. A measuring device is located downstream of the catheter for determining the partial pressure of the gas in the carrier fluid. A mass transfer unit receives the gas after the measuring device and is arranged to bring the partial pressure of the gas in the carrier fluid to a predetermined value.