Catheter electrode for electrochemical analysis
First Claim
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1. An electrochemical analysis sensor comprising:
- (a) a sheath constructed as a pericatheter being closed at one end thereof by a semi-permeable membrane being an integral part thereof, said membrane being permeable to certain predetermined substances, but impervious to macromolecules and bacteria; and
(b) a replaceable measuring probe having a membrane at one end thereof, disposed in said sheath, said measuring probe being a completely self-contained sensing device, said probe membrane and said sheath membrane being in intimate contact and free of electrolyte therebetween.
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Abstract
The electrical sensor of the present invention for electrochemical analysis comprises a sheath and at one end thereof a semi-permeable membrane which is impermeable for macromolecular materials and bacteria, and further is comprising a measuring probe insertible to said sheath.
The sheath is constructed in the form of a pericatheter and the measuring probe comprises a completely self-contained sensor, capable of operating independently of the said sheath, the membrane of said sensor being in direct contact with the membrane of said pericatheter.
118 Citations
2 Claims
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1. An electrochemical analysis sensor comprising:
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(a) a sheath constructed as a pericatheter being closed at one end thereof by a semi-permeable membrane being an integral part thereof, said membrane being permeable to certain predetermined substances, but impervious to macromolecules and bacteria; and (b) a replaceable measuring probe having a membrane at one end thereof, disposed in said sheath, said measuring probe being a completely self-contained sensing device, said probe membrane and said sheath membrane being in intimate contact and free of electrolyte therebetween.
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2. A sensor wherein said pericatheter sheath and said measuring probe are a flexible tube.
Specification
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Current AssigneeDr Eduard Fresenius Chemisch-Pharmazeutische Industrie KG Apparatebau KG
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Original AssigneeDr Eduard Fresenius Chemisch-Pharmazeutische Industrie KG Apparatebau KG
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InventorsSchal, Wilfried, Schindler, Johannes G.
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Primary Examiner(s)Kaplan, G. L.
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Application NumberUS05/912,884Time in Patent Office680 DaysField of Search204/1 P, 204/195 P, 128/635US Class Current600/348CPC Class CodesA61B 5/14542 for measuring blood gases A...A61B 5/1473 invasive, e.g. introduced i...
