EP0080680A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Reference electrode catheter
Assignee: Sentron Vof
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Filing: 1982-11-22
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Granted: —
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Expires: 2002-11-22
Abstract
Abstract A reference electrode catheter for use for in vivo measurement of body fluids. The catheter includes a small diameter cylindrical tube having a reference electrode assembly disposed on the distal end thereof. The reference electrode assembly includes a hollow cylindrical housing and an electrode element positioned within the housing mounted on and supported by a retainer member. The electrode element is connected to an electrical conductor which extends out of the housing and through the passageway of the tubing to the proximal end of the tubing. An electrolytic material, such as gelled Ringer's solution, is disposed within the housing, and a membrane formed of hydrogel is positioned across an aperture in the housing so as to form an ion diffusion barrier between the body fluids to be measured and the electrolytic material within the housing.
Inventors
- 👤 Gary S. Margules
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/1468; A61B5/1473
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
150 words
A catheter for use in measuring body fluids comprising: an elongated cylindrical tube having proximal and distal ends and having a passageway extending throughout the entire lenght thereof; a hollow cylindrical housing member having enclosed ends to thereby form a sealed chamber within said housing member, an aperture extending through one of the walls of said housing member; an electrode positioned within the chamber; a conductive lead connected to said electrode and extending out of the housing member and through said passageway of said tubing to the proximal end of said tubing; retainer means positioned within said housing for supporting said electrode; an electrolytic material disposed within the chamber of the cylindrical housing member; and a membrane comprised of hydrogel being positioned across said aperture in said housing so as to form an ion diffusion barrier between body fluids to be measured and the electrolytic material within the housing member.
Claim 2
Dependent Claim
150 words
A catheter for use in measuring body fluids comprising: an elongated cylindrical tube having proximal and distal ends and having a passageway extending throughout the entire lenght thereof; a hollow cylindrical housing member having enclosed ends to thereby form a sealed chamber within said housing member, an aperture extending through one of the walls of said housing member; an electrode positioned within the chamber; a conductive lead connected to said electrode and extending out of the housing member and through said passageway of said tubing to the proximal end of said tubing; retainer means positioned within said housing for supporting said electrode; an electrolytic material disposed within the chamber of the cylindrical housing member; and a membrane comprised of hydrogel being positioned across said aperture in said housing so as to form an ion diffusion barrier between body fluids to be measured and the electrolytic material within the housing member.
Claim 3
Dependent Claim
15 words
A catheter as defined in Claim 1 wherein said hydrogel membrane is formed of poly(hydroxyethylmethacrylate).
Claim 4
Dependent Claim
42 words
A catheter as defined in Claim 1 wherein said hydrogel membrane is comprised of a selected one of the group consisting of: poly(hydroxyethylmethacrylate), poly (glyceryl methacrylate), poly(hydroxypropyl methycry- late), poly(hydroxyethoxyethyl methacrylate), poly(hy- droxydiethoxyethyl methacrylate), poly(methoxyethyl methacrylate), poly(methoxyethoxyethyl methacrylate), poly(methoxydiethoxyethyl methacrylate), poly(2,3-dihydroxypropyl methacrylate).
Claim 5
Dependent Claim
83 words
A catheter as defined in Claim 1 wherein said elongated cylindrical tube has a second passageway extending throughout the entire length thereof, the second passageway being positioned such that the distal end of the passageway is disposed in proximity to an outer surface of the hydrogel membrane so that fluid passing through said second passageway in a direction from the proximal end to the distal end of the elongated cylindrical tube provides a flushing action across the outer surface of the hydrogel membrane.
Claim 6
Dependent Claim
15 words
A catheter as defined in Claim 1 wherein said electrolytic material is gelled Ringer's solution.
Claim 7
Dependent Claim
15 words
A catheter as defined in Claim 4 wherein said electrolytic material is gelled Ringer's solution.
Claim 8
Dependent Claim
118 words
A reference electrode for measuring body fluids comprising: a hollow cylindrical housing member having enclosed ends to thereby form a sealed chamber within said housing member, an aperture extending through one of the walls of said housing member; an electrode positioned within the chamber; a conductive lead connected to the electrode and extending out of the housing member; retainer means positioned within said housing for supporting said electrode; an electrolytic material disposed within the chamber of the cylindrical housing member; and, a membrane comprised of hydrogel being positioned across said aperture in said housing so as to form an ion diffusion barrier between body fluids to be mea- . sured and the electrolytic material within the housing member.
Claim 9
Dependent Claim
118 words
A reference electrode for measuring body fluids comprising: a hollow cylindrical housing member having enclosed ends to thereby form a sealed chamber within said housing member, an aperture extending through one of the walls of said housing member; an electrode positioned within the chamber; a conductive lead connected to the electrode and extending out of the housing member; retainer means positioned within said housing for supporting said electrode; an electrolytic material disposed within the chamber of the cylindrical housing member; and, a membrane comprised of hydrogel being positioned across said aperture in said housing so as to form an ion diffusion barrier between body fluids to be mea- . sured and the electrolytic material within the housing member.
Claim 10
Dependent Claim
13 words
A catheter as defined in Claim 7 wherein said hydrogel membrane is poly(hydroxyethylmethacrylate).
Claim 11
Dependent Claim
41 words
A catheter as defined in Claim 7 wherein said hydrogel membrane is comprised of a selected one of the group consisting of: poly(hydroxyethylmethacrylate), poly(glyceryl methacrylate), poly(hydroxypropyl methacrylate), poly(hydroxyethoxyethyl methacrylate), poly(hydroxydiethoxyethyl methacrylate), poly(methoxyethyl methacrylate), poly (methoxyethoxyethyl methacrylate), poly(methoxydiethoxy- ethyl methacrylate), poly(2,3-dihydroxypropyl methacrylate).
Claim 12
Dependent Claim
83 words
A catheter as defined in Claim 7 wherein said elongated cylindrical tube has a second passageway extending throughout the entire length thereof, the second passageway being positioned such that the distal end of the passageway is disposed in proximity to an outer surface of the hydrogel membrane so that fluid passing through said second passageway in a direction from the proximal end to the distal end of the elongated cylindrical tube provides a flushing action across the outer surface of the hydrogel membrane.
Claim 13
Dependent Claim
15 words
A catheter as defined in Claim 7 wherein said electrolytic material is gelled Ringer's solution.
Claim 14
Dependent Claim
15 words
A catheter as defined in Claim 10 wherein said electrolytic material is gelled Ringer's solution.
Claim 15
Dependent Claim
48 words
A catheter as defined in Claim 7 wherein said membrane is comprised of hydrogel formed by polymerizing a selected one from the group of monomers comprising: hydroxyalkyl methacrylate, acrylamide derivatives, n-vinyl pyrrolidone, hydrophobic acrylics, acrylic acid derivatives, crotonic acid, sodium styrene sulfonate, aminoethyl methacrylate derivatives and vinyl pyridine.
References Cited (Backward Citations)
No citation records indexed.
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