US4499901A
Expired / Lapsed
US
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Retreated sensing electrode
Assignee: CR Bard Inc
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Filing: 1983-06-30
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Granted: 1985-02-19
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Expires: 2003-06-30
Abstract
Abstract An improved sensing electrode assembly for testing for a constituent in blood is provided. An electrode assembly exhibits a decreased time to reach stable operation by virtue of having the assembly pretreated by applying thereto a liquid containing blood derived albumin.
Inventors
- 👤 Joseph J. Chang
- 👤 Maynard Ramsey, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:56
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/4925; A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/1468; A61B5/1473; A61B5/68; A61B5/6846; A61B5/6847; A61B5/6848; A61B5/6849
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
80 words
In an electrode assembly for insertion into a living animal to continuously monitor blood gas concentration, which assembly includes an electrode and a hydrophilic polymer membrane covering said electrode, wherein said membrane is hydrophilic substantially throughout its thickness, the improvement which comprises: said covering membrane being pretreated by having applied thereto a liquid solution comprising blood derived albumin, said pretreated membrane than being sterilized; and said electrode assembly exhibiting a lower T S than an assembly having an untreated membrane.
Claim 2
Dependent Claim
80 words
In an electrode assembly for insertion into a living animal to continuously monitor blood gas concentration, which assembly includes an electrode and a hydrophilic polymer membrane covering said electrode, wherein said membrane is hydrophilic substantially throughout its thickness, the improvement which comprises: said covering membrane being pretreated by having applied thereto a liquid solution comprising blood derived albumin, said pretreated membrane than being sterilized; and said electrode assembly exhibiting a lower T S than an assembly having an untreated membrane.
Claim 3
Dependent Claim
15 words
The electrode assembly of claim 1 wherein the T S is less than six hours.
Claim 4
Dependent Claim
14 words
The electrode assembly of claim 1 wherein said liquid solution is an aqueous solution.
Claim 5
Dependent Claim
19 words
The electrode assembly of claim 1 wherein said liquid solution is a solution of essembly pure blood derived albumin.
Claim 6
Dependent Claim
16 words
The electrode assembly of claim 4 wherein said blood derived albumin is human blood derived albumin.
Claim 7
Dependent Claim
17 words
The electrode assembly of claim 1 wherein said liguid solution is a solution of blood derived proteins.
Claim 8
Dependent Claim
16 words
The electrode assembly of claim 6 wherein said blood derived proteins are human blood derived proteins.
Claim 9
Dependent Claim
13 words
The electrode assembly of claim 1 wherein said liquid solution is blood serum.
Claim 10
Dependent Claim
14 words
The electrode assembly of claim 8 wherein said blood serum is human blood serum.
Claim 11
Independent Claim
86 words
A method for decreasing the T S of an electrode assembly for insertion in a living animal to continuously monitor blood gas concentration, which assembly includes an electrode and a hydrophilic polymer membrane covering said electrode, wherein said membrane is hydrophilic substantially throughout its thickness, comprising the steps: pretreating said electrode by applying to said membrane a liquid solution comprising blood derived albumin and then sterilizing said electrode, whereby the T S of said electrode assembly is substantially lower than an assembly having an untreated membrane.
Claim 12
Independent Claim
86 words
A method for decreasing the T S of an electrode assembly for insertion in a living animal to continuously monitor blood gas concentration, which assembly includes an electrode and a hydrophilic polymer membrane covering said electrode, wherein said membrane is hydrophilic substantially throughout its thickness, comprising the steps: pretreating said electrode by applying to said membrane a liquid solution comprising blood derived albumin and then sterilizing said electrode, whereby the T S of said electrode assembly is substantially lower than an assembly having an untreated membrane.
Claim 13
Dependent Claim
22 words
The method of claim 10 wherein said liquid is applied by immersing said electrode in said liquid for at least 10 minutes.
Claim 14
Dependent Claim
18 words
The method of claim 11 wherein said electrode is immersed in said liquid for at least one hour.
Claim 15
Dependent Claim
15 words
The method of claim 10 wherein said electrode is dried after said solution is applied.
Claim 16
Dependent Claim
14 words
The method of claim 13 wherein said electrode is sterilized after it is dried.
Claim 17
Dependent Claim
15 words
The method of claim 13 wherein silicone is applied to said electrode prior to drying.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |