On-Line Measuring System of Body Substances
AssigneeMaquet Critical Care AB
InventorsStefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
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Abstract
A measuring system (100) for continuously measuring body fluid constituents, said measuring system (100) comprising a microdialysis catheter or probe (110) comprising a microdialysis membrane (116) to be placed in a blood stream or in tissue fluid. The measuring system further comprises a flow through sensor (200) for continuously measuring the concentration of substances present in the fluid that has passed the microdialysis membrane (116). The measuring system (100) further comprises a waste container (126).
Claims24
-22. (canceled)
A measuring system for measuring the concentration of substances or analytes in a body fluid or in a body tissue, comprising:
- a microdialysis probe comprising a microdialysis membrane, both being adapted to be placed in blood or in tissue,
- a flow through sensor for analysing a fluid having passed said microdialysis probe,
- a pump for pumping said fluid to and through said microdialysis probe and further to and through said sensor, and
- tubing connecting said pump to said microdialysis probe and said microdialysis probe to said sensor,
- said pump effecting a flow rate in said system in the interval 0.2-15 microliters per minute, wherein the sensor comprises a flow channel having a flow resistance or pressure drop adapted to the characteristics of the microdialysis membrane so as to eliminate, or at least substantially reduce, ultra filtering in the microdialysis membrane.
Dependencies are inferred from the claim text.