US4233263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of maintaining bacterial sterility in urine drainage bags
Assignee: Northwestern University
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Filing: 1979-04-02
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Granted: 1980-11-11
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Expires: 1999-04-02
Abstract
Abstract Urine drainage bags connected to indwelling catheters are maintained in bacterially sterile condition by periodic addition of small quantities of 3% U.S.P. hydrogen peroxide solution. The method protects both the bladder and the hospital environment from bacterial contamination.
Inventors
- 👤 Anthony J. Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:51
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/18; A01; A01N; A01N59/00; Y; Y10; Y10S; Y10S128/00; Y10S128/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
The method of maintaining bacterial sterility in a urine drainage bag of a closed urinary drainage system, wherein urine is collected in said bag for several hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection from 15 to 60 milliliters of an aqueous solution of hydrogen peroxide (H 2 O 2 ) containing from 0.025 to 0.035 grams of H 2 O 2 per milliliter.
Claim 2
Independent Claim
74 words
The method of maintaining bacterial sterility in a urine drainage bag of a closed urinary drainage system, wherein urine is collected in said bag for several hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection from 15 to 60 milliliters of an aqueous solution of hydrogen peroxide (H 2 O 2 ) containing from 0.025 to 0.035 grams of H 2 O 2 per milliliter.
Claim 3
Dependent Claim
21 words
The method of claim 1 in which from 20 to 40 milliliters of said H 2 O 2 solution are introduced.
Claim 4
Independent Claim
60 words
The method of maintaining bacterial sterility in a urine drainage bag in a closed urinary drainage system, wherein urine is collected in said bag for a period of from 6 to 10 hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection from 20 to 40 milliliters of 3% hydrogen peroxide (U.S.P.).
Claim 5
Independent Claim
60 words
The method of maintaining bacterial sterility in a urine drainage bag in a closed urinary drainage system, wherein urine is collected in said bag for a period of from 6 to 10 hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection from 20 to 40 milliliters of 3% hydrogen peroxide (U.S.P.).
Claim 6
Dependent Claim
19 words
The method of claim 3 in which approximately 30 milliliters of said H 2 O 2 solution are introduced.
Claim 7
Independent Claim
83 words
The method of maintaining bacterial sterility in a urine drainage bag connected to an indwelling catheter in a closed drainage system, wherein urine is collected in said bag for periods of from 6 to 10 hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection from 15 to 60 milliliters of an aqueous solution of hydrogen peroxide (H 2 O 2 ) containing from 0.025 to 0.035 grams of H 2 O 2 per milliliter.
Claim 8
Independent Claim
83 words
The method of maintaining bacterial sterility in a urine drainage bag connected to an indwelling catheter in a closed drainage system, wherein urine is collected in said bag for periods of from 6 to 10 hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection from 15 to 60 milliliters of an aqueous solution of hydrogen peroxide (H 2 O 2 ) containing from 0.025 to 0.035 grams of H 2 O 2 per milliliter.
Claim 9
Dependent Claim
21 words
The method of claim 5 in which from 20 to 40 milliliters of said H 2 O 2 solution are introduced.
Claim 10
Independent Claim
61 words
The method of maintaining bacterial sterility in a urine drainage bag connected to an indwelling catheter in a closed urinary drainage system, wherein urine is collected in said bags for a period of approximately 8 hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection approximately 30 milliliters of 3% hydrogen peroxide (U.S.P.).
Claim 11
Independent Claim
61 words
The method of maintaining bacterial sterility in a urine drainage bag connected to an indwelling catheter in a closed urinary drainage system, wherein urine is collected in said bags for a period of approximately 8 hours and then emptied therefrom, consisting essentially of introducing into said bag before each period of urine collection approximately 30 milliliters of 3% hydrogen peroxide (U.S.P.).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |