EP0336985A1
Expired / Lapsed
EP
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Method for manufacturing an optical probe
Assignee: Hewlett Packard GmbH Germany
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Filing: 1988-04-09
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Granted: —
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Expires: 2008-04-09
Abstract
Abstract Optical probes for the invasive measurement of blood parameters consist of at least one sensor (6, 7, 27), each of these sensors (6, 7,27) having a diffusion zone with a selective membrane (20, 24, 29). The sensor or the sensors (6, 7, 27) are surrounded by a stabilizing sheath (5). This sheath (5) is to be fastened on sensor(s) (6, 7, 27) by glue (17). A silicone glue provides the feature that gas molecules can diffuse through it; therefore, blood gas sensors such as pO₂ sensors or pCO₂ sensors may be completely embedded in said glue. If a pH sensor (6) is used, it must be placed in the top position of the horizontally lying sheath (5) during manufacturing. The silicone glue then does not cover the diffusion zone of the pH sensor (6) completely. Further, silicone glue provides additional elasticity which improves sensor characteristics.
Inventors
- 👤 Martin Günther
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:14
CPC Classifications
G; G01; G01N; G01N33/00; A; A61; A61B; A61B5/00; A61B5/145; A61B5/14539; A61B5/1455; A61B5/1459; G01N21/00; G01N21/75; G01N21/77; G01N21/7703
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
Method for manufacturing an optical probe for the invasive measurement of blood parameters, said optical probe comprising at least one sensor (7,27) sensitive to a blood gas parameter such as pO₂ or pCO₂ and at least one additional sensor (6) sensitive to the pH value of the blood, said sensors having selective membranes (24, 29, 20), and said optical prove further comprising a sheath (5) at least partially covering said sensors (7, 27,6) and fastened on said sensor by a glue, said method being characterized by the following manufacturing steps: (1) The sheath (5) is placed in an approximately horizontal position, (2) the sensors (7,27,6) are introduced into the sheath (5) such that (2.1) the pH sensor (6) is in the top position, whereas (2.2) the blood gas sensors (7,27) are placed below the pH sensor (6). (3) a glue which allows diffusion of gas molecules in its hardened state is introduced into the sheath (5).
Claim 2
Dependent Claim
156 words
Method for manufacturing an optical probe for the invasive measurement of blood parameters, said optical probe comprising at least one sensor (7,27) sensitive to a blood gas parameter such as pO₂ or pCO₂ and at least one additional sensor (6) sensitive to the pH value of the blood, said sensors having selective membranes (24, 29, 20), and said optical prove further comprising a sheath (5) at least partially covering said sensors (7, 27,6) and fastened on said sensor by a glue, said method being characterized by the following manufacturing steps: (1) The sheath (5) is placed in an approximately horizontal position, (2) the sensors (7,27,6) are introduced into the sheath (5) such that (2.1) the pH sensor (6) is in the top position, whereas (2.2) the blood gas sensors (7,27) are placed below the pH sensor (6). (3) a glue which allows diffusion of gas molecules in its hardened state is introduced into the sheath (5).
Claim 3
Dependent Claim
15 words
Method according to claim 1, characterised in that said glue is a silicone glue (17).
Claim 4
Dependent Claim
73 words
Optical probe for the invasive measurement of blood parameters comprising at least one sensor (7,27) sensitive to a blood gas parameter such as pO₂ or pCO₂, said sensor having a diffusion zone covered a by selective membrane (24,29), and said optical probe further comprising a sheath (5) at least partially covering said sensor (7,27) and fastened on said sensor (7,27) by a glue, characterized in that said glue is a silicone glue (17).
Claim 5
Dependent Claim
73 words
Optical probe for the invasive measurement of blood parameters comprising at least one sensor (7,27) sensitive to a blood gas parameter such as pO₂ or pCO₂, said sensor having a diffusion zone covered a by selective membrane (24,29), and said optical probe further comprising a sheath (5) at least partially covering said sensor (7,27) and fastened on said sensor (7,27) by a glue, characterized in that said glue is a silicone glue (17).
Claim 6
Dependent Claim
57 words
Optical probe according to claim 3 with an additional sensor (6) sensitive to the pH value of the blood, characterized in that said silicone glue (17) covers the selective membrane (20) of the pH sensor (6) only partially, whereas it covers the selective membrane (24,29) of the blood gas sensitive sensor (7, 27) completely or almost completely.
Claim 7
Dependent Claim
40 words
Optical probe according to claim 3 or 4, characterized in that it comprises two or more blood gas sensors (7,27) and/or a wire (30,34) which is connected to a metal cap (16,33) fixed on the top of said sheath (5,32).
References Cited (Backward Citations)
EP0279004A1
Cited
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