US4687475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for sequential intravenous infusion of multiple fluids
Assignee: I Flow Corp
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Filing: 1986-04-07
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Granted: 1987-08-18
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Expires: 2006-04-07
Abstract
Abstract A method of sequential intravenous infusion of a plurality of fluid solutions is disclosed in which a spacer solution is administered alternately with the fluid solutions to prevent the fluid solutions from substantially mixing with one another.
Inventors
- 👤 Henry T. Tai
- 👤 Eric W. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:53
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16804; A61M5/16827; A61M5/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A method for sequential intravenous administration of a plurality of fluid solutions, said method comprising: providing a valve that provides continuous communication between an output and at least one of a plurality of inputs; connecting a neutral solution to one input of said valve; connecting each of said plurality of solutions to different inputs of said valve; connecting a lumen of a catheter tube to the output of said valve; and using an electronic processor to alternately switch said valve between the input connected to said neutral solution and one of said other plurality of inputs at predetermined intervals, said neutral solution being provided between said fluid solutions to prevent said fluid solutions from substantially mixing in said lumen of said catheter tube.
Claim 2
Independent Claim
123 words
A method for sequential intravenous administration of a plurality of fluid solutions, said method comprising: providing a valve that provides continuous communication between an output and at least one of a plurality of inputs; connecting a neutral solution to one input of said valve; connecting each of said plurality of solutions to different inputs of said valve; connecting a lumen of a catheter tube to the output of said valve; and using an electronic processor to alternately switch said valve between the input connected to said neutral solution and one of said other plurality of inputs at predetermined intervals, said neutral solution being provided between said fluid solutions to prevent said fluid solutions from substantially mixing in said lumen of said catheter tube.
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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) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |