Title:
PARTIAL-PRESSURE MEASURING DEVICE FOR GAS DISSOLVED IN FLUID
Document Type and Number:
Japanese Patent JPS6366437
Kind Code:
A
Abstract:
The means comprises a catheter (1) which can be inserted in the fluid (B) and contains a carrier fluid (3). The gases released in the fluid (B) can be diffused through the catheter wall into the carrier fluid (3). To ensure that this occurs, the catheter is designed as a double-cavity coaxial catheter (1), whose outer tube (5) is permeable for the gases. By means of a pump device (8), a continuous circulating flow of the carrier fluid (3) is maintained through the inner tube (4), the intermediate space between the outer and the inner tube (4, 5), a measurement device (6) for the partial pressure of the gases to be measured in the carrier fluid (3) and a material exchange unit (7), in which the enriched carrier fluid (3) has the gases removed from it, back into the inner tube (4). The flow path can also run in reverse. The means allows a continuous determination of the partial pressure of the gases and gas mixtures without a sample of the fluid (B) having to be removed. This is particularly important in the medical field.
Inventors:
GIYUNTAA RAU
HERUMUUTO ROIRU
HARARUTO ENGERUHARUTO
HERUMUUTO ROIRU
HARARUTO ENGERUHARUTO
Application Number:
JP15322387A
Publication Date:
March 25, 1988
Filing Date:
June 19, 1987
Export Citation:
Assignee:
SIEMENS AG
International Classes:
A61B5/00; A61B5/145; G01N7/10; G01N27/27; G01N33/18; G01N33/497; G01N33/49; (IPC1-7): A61B5/14; G01N7/10; G01N27/48; G01N33/18; G01N33/49; G01N33/497
Attorney, Agent or Firm:
Tomimura Kiyoshi