EP0083969A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polarographic gas sensors
Assignee: Novametrix Medical Systems Inc
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Filing: 1983-01-05
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Granted: —
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Expires: 2003-01-05
Abstract
Abstract Thin film polarographic gas sensors are described wherein the electrodes are deposited on a flexible substrate. A bilumen monopolar catheter-type sensor has a thin cathode layer (8) deposited on the wall of one lumen (4), the distal end of which is sealed by a polyurethane plug (10) such that only the outer edge surface of the cathode layer (8) is in contact with a dip-coated permeable membrane (14). The cathode layer (8) extends to the proximal end of the catheter (2) where electrical contact is made with a conductor wire (16) through electrically-conductive epoxy resin (18). When the sensor is employed umbilically or intravascularly, the second lumen (6) may be employed to withdraw samples from the patient or supply fluids thereto. The cathode layer (8) may be deposited on the catheter material in long lengths, which are then subsequently cut to the appropriate length for individual catheter-type sensors.
Inventors
- 👤 Dawood Parker
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 16:38
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/1468; A61B5/1473; G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/4925
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
47 words
A polarographic gas sensor comprising a flexible elongate substrate onto the distal end of which is deposited a layer of an electrode material as an annular ring, and an electrically-conductive material in electrical contact with said electrode material and extending to the proximal end of said substrate.
Claim 2
Dependent Claim
47 words
A polarographic gas sensor comprising a flexible elongate substrate onto the distal end of which is deposited a layer of an electrode material as an annular ring, and an electrically-conductive material in electrical contact with said electrode material and extending to the proximal end of said substrate.
Claim 3
Dependent Claim
23 words
A sensor according to claim 7 wherein the electrode material extends from the distal to the proximal end and forms the electrically-conductive material.
Claim 4
Dependent Claim
29 words
A sensor according to claim 1 or 2 wherein the outer edge of the annular ring of electrode material is in contact with and overlaid by a permeable membrane.
Claim 5
Dependent Claim
17 words
A sensor according to any of claims 7 to 3 wherein the substrate comprises a flexible catheter.
Claim 6
Dependent Claim
12 words
A sensor according to claim 4 wherein the catheter comprises two lumens.
Claim 7
Dependent Claim
26 words
A sensor according to claim 4 or 5 wherein the layer is deposited on the wall of the, or one of the lumens of the catheter.
Claim 8
Dependent Claim
40 words
A sensor according to claim 6 wherein the distal end of the lumen bearing the layer of electrode material is closed with an electrically-insulating material so as to expose only the outer edge of said annular ring to said membrane.
Claim 9
Dependent Claim
84 words
A sensor according to any of claims 4 to 7 wherein first and second layers of electrode material are provided on the catheter extending from the distal to the proximal end, one layer on the wall of the, or one of the lumens of the catheter and the other on the outer surface of the catheter and providing concentric annular rings of electrode material at the distal end the outer edges of which rings are in contact with and overlaid by said permeable membrane.
Claim 10
Dependent Claim
18 words
A sensor according to any of claims 1 to 8 wherein the substrate is a synthetic plastics material.
Claim 11
Independent Claim
85 words
A method of manufacturing a polarographic gas sensor which comprises providing a flexible elongate substrate material, depositing a layer of an electrode material onto the substrate material with the deposited layer extending from the distal to the proximal end of the length of substrate material, with an annular ring of electrode material existing at the distal end, and optionally coating the distal end with a permeable membrane such that the outer edge of said annular ring is in contact with and overlaid by said membrane.
Claim 12
Independent Claim
85 words
A method of manufacturing a polarographic gas sensor which comprises providing a flexible elongate substrate material, depositing a layer of an electrode material onto the substrate material with the deposited layer extending from the distal to the proximal end of the length of substrate material, with an annular ring of electrode material existing at the distal end, and optionally coating the distal end with a permeable membrane such that the outer edge of said annular ring is in contact with and overlaid by said membrane.
Claim 13
Dependent Claim
37 words
A method according to claim 10 which comprises depositing said layer onto a length of said substrate material and severing the latter into shorter lengths such that each cut length is employed to form an individual sensor.
Claim 14
Dependent Claim
25 words
A method according to claim 11 or 12 wherein the layer is provided by depositing an electrically-conductive paint, by electrochemical deposition, or by vacuum deposition.
Claim 15
Independent Claim
17 words
A method according to any of claims 10 to 12 wherein the substrate material is a catheter.
Claim 16
Dependent Claim
20 words
A method according to claim 13 wherein the layer is deposited on the wall of the lumen of the catheter.
Claim 17
Dependent Claim
56 words
A method according to claim 14 wherein a separate layer of electrode material, extending from the distal to the proximal end, is provided on the outer surface of the catheter and providing, with the first annular ring, concentric annular rings of electrode materials whose outer edges are in contact with and overlaid by said permeable membrane.
Claim 18
Dependent Claim
21 words
A method according to claim 14 or 15 wherein the distal end of said catheter is closed with an electrically-insulating material.
Claim 19
Dependent Claim
20 words
A polarographic gas sensor substantially as herein described with reference to Figures 2, 4 or 5 of the accompanying drawings.
Claim 20
Dependent Claim
20 words
A polarographic gas sensor substantially as herein described with reference to Figures 2, 4 or 5 of the accompanying drawings.
Claim 21
Independent Claim
28 words
A method of manufacturing a polarographic gas sensor substantially as herein described with reference to Figures 1 and 2, 3 and 4 or 5 of the accompanying drawings.
Claim 22
Independent Claim
28 words
A method of manufacturing a polarographic gas sensor substantially as herein described with reference to Figures 1 and 2, 3 and 4 or 5 of the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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