US4445885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulin releasing supplier
Assignee: Unitika Ltd
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Filing: 1979-09-25
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Granted: 1984-05-01
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Expires: 1999-09-25
Abstract
Abstract An insulin supplier, which can be effectively used for the treatment of diabetic patients, comprising a casing and at least one tubular structure composed of a polymeric semipermeable membrane to provide an internal chamber inside of the tubular membrane and an external chamber outside of the tubular membrane, either one of the internal chamber and the external chamber having at least one fluid-inlet and at least one fluid-outlet; wherein blood or another body fluid is introduced into that chamber which has the at least one fluid-inlet and the at least one fluid-outlet and a solution of insulin is introduced into the other chamber, whereby insulin in an effective amount required for metabolism within the body is supplied to the blood or the body fluid depending on the blood glucose level through the polymeric semipermeable membrane between the internal and external chambers over a long period of time.
Inventors
- 👤 Koji Kifune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:53
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/34; A61M1/342; A61M1/3424; A61M1/3427
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
203 words
A method for supplying insulin to a patient which comprises connecting the patient to an insulin supplier comprising a casing and at least one tubular structure, said tubular structure being formed of hollow fibers and constituting a polymeric semipermeable membrane comprising a polymer selected from a cellulose, polyvinyl alcohol or polyamide and having pores of 100 Å to 2μ in size to provide an internal chamber inside of the tubular polymeric semipermeable membrane and an external chamber outside of the tubular polymeric semipermeable membrane, either the internal chamber or the external chamber having at least one fluid-inlet and at least one fluid-outlet, said hollow fibers having a thickness of about 10 to 50μ and an inside diameter of about 50 to 400μ, introducing blood or another body fluid of said patient into that chamber which has said at least one fluid-inlet and at least one fluid-outlet and providing an aqueous solution or emulsion of insulin in the other chamber, whereby insulin in an amount required for metabolism within the body is supplied to the blood or the body fluid in response to the blood glucose level through the polymeric semipermeable membrane between the internal and external chambers continually over a period of time.
Claim 2
Independent Claim
203 words
A method for supplying insulin to a patient which comprises connecting the patient to an insulin supplier comprising a casing and at least one tubular structure, said tubular structure being formed of hollow fibers and constituting a polymeric semipermeable membrane comprising a polymer selected from a cellulose, polyvinyl alcohol or polyamide and having pores of 100 Å to 2μ in size to provide an internal chamber inside of the tubular polymeric semipermeable membrane and an external chamber outside of the tubular polymeric semipermeable membrane, either the internal chamber or the external chamber having at least one fluid-inlet and at least one fluid-outlet, said hollow fibers having a thickness of about 10 to 50μ and an inside diameter of about 50 to 400μ, introducing blood or another body fluid of said patient into that chamber which has said at least one fluid-inlet and at least one fluid-outlet and providing an aqueous solution or emulsion of insulin in the other chamber, whereby insulin in an amount required for metabolism within the body is supplied to the blood or the body fluid in response to the blood glucose level through the polymeric semipermeable membrane between the internal and external chambers continually over a period of time.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the internal chamber is an insulin solution chamber.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the insulin solution or emulsion is pressurized.
Claim 5
Dependent Claim
19 words
The method of claim 3 wherein the cross-sectional shape of the tubular structure is triangular, polygonal, circular or elliptical.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein blood of said patient is introduced into said chamber.
Claim 7
Dependent Claim
60 words
The process of claim 1 wherein both the internal chamber and the external chamber have at least one fluid-inlet and at least one fluid-outlet, and an aqueous solution or emulsion of insulin is passed through the other chamber by means of said at least one fluid-inlet and said at least one fluid-outlet being linked to means for flowing a fluid.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the insulin is passed through the internal chamber.
Claim 9
Dependent Claim
64 words
The process of claim 6 which includes determining the glucose level in the blood or body fluid by means of a sensor placed into the chamber into which the blood or body fluid is introduced and linking said sensor to the means for flowing the insulin fluid, whereby the flow rate of the insulin fluid is varied in response to the glucose level determined.
Claim 10
Dependent Claim
14 words
The process of claim 6 wherein the blood or other body fluid is blood.
Claim 11
Dependent Claim
15 words
The method of claim 1 wherein the cellulose is cuprophane, cellulose acetate or regenerated cellulose.
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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |