US4911691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assembly for adminstering IV solution
Assignee: Ethicon Inc
•
Filing: 1987-08-18
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Granted: 1990-03-27
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Expires: 2007-08-18
Abstract
Abstract An article, suitable for use as a body implant, is made from a novel composition comprising a multiple phase polymer composition comprising: (a) a first phase which comprises a substantially nonhydrophilic polymeric component; and (b) a second phase which comprises a hydrophilic polymeric component; said composition (i) being capable of absorbing water to an extent that it softens with a softening ratio of at least about 2:1 and/or swells with a swelling ratio of at least about 1.3:1; and (ii) when substantially completely hydrated has an energy to break of at least about 700 N-cm/cm 3 and a 2.5% Secant modulus of less than about 7,000 N/cm 2 .
Inventors
- 👤 Lawrence M. Aniuk
- 👤 Ronald L. Dieck
- 👤 Dwayne Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:22
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61L; A61L29/00; A61L29/04; A61L29/049; A61L29/14; A61L29/145; C; C08; C08L; C08L101/00; C08L2203/00; C08L2203/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
An assembly for administering an IV solution to a patient which comprises: (a) a needle; and (b) a cannula surrounding the needle, the walls of which cannula are of a multiple phase polymeric composition comprising: (i) a first phase which is continuous and comprises a substantially non-hydrophilic polymeric component capable of absorbing no more than about 30% water; and (ii) a second phase which comprises a hydrophilic polymeric component capable of absorbing at least 50% water; wherein said cannula is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2:1 and/or swells with a swelling ratio of at least about 1.3:1; and when substantially completely hydrated, has a tensile energy to break of at least about 700 N-cm/cm 3 and a 2.5% Secant modulus of less than about 7,000 N/cm 2 .
Claim 2
Dependent Claim
141 words
An assembly for administering an IV solution to a patient which comprises: (a) a needle; and (b) a cannula surrounding the needle, the walls of which cannula are of a multiple phase polymeric composition comprising: (i) a first phase which is continuous and comprises a substantially non-hydrophilic polymeric component capable of absorbing no more than about 30% water; and (ii) a second phase which comprises a hydrophilic polymeric component capable of absorbing at least 50% water; wherein said cannula is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2:1 and/or swells with a swelling ratio of at least about 1.3:1; and when substantially completely hydrated, has a tensile energy to break of at least about 700 N-cm/cm 3 and a 2.5% Secant modulus of less than about 7,000 N/cm 2 .
Claim 3
Dependent Claim
142 words
An assembly for administering an IV solution to a patient which comprises: (a) a needle; and (b) a tubular cannula positioned within the needle, the walls of which cannula are of a multiple phase polymeric composition comprising: (i) a first phase which is continuous and comprises a substantially non-hydrophilic polymeric component capable of absorbing no more than about 30% water; and (ii) a second phase which comprises hydrophilic polymeric component capable of absorbing at least 50% water; wherein said cannula is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2:1 and/or swells with a swelling ratio of at least about 1.3:1; and when substantially completely hydrated, has a tensile energy to break of at least about 700 N-cm/cm 3 and a 2.5% Secant modulus of less than about 7,000 N/cm 2 .
Claim 4
Dependent Claim
142 words
An assembly for administering an IV solution to a patient which comprises: (a) a needle; and (b) a tubular cannula positioned within the needle, the walls of which cannula are of a multiple phase polymeric composition comprising: (i) a first phase which is continuous and comprises a substantially non-hydrophilic polymeric component capable of absorbing no more than about 30% water; and (ii) a second phase which comprises hydrophilic polymeric component capable of absorbing at least 50% water; wherein said cannula is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2:1 and/or swells with a swelling ratio of at least about 1.3:1; and when substantially completely hydrated, has a tensile energy to break of at least about 700 N-cm/cm 3 and a 2.5% Secant modulus of less than about 7,000 N/cm 2 .
Claim 5
Dependent Claim
42 words
An assembly in accordance with claim 46 or claim 2 wherein said non-hydrophilic polymer component comprises a polymer selected from the group consisting of a polyurethane, an ethylene-vinyl acetate copolymer, an ethylene-ethyl acrylate copolymer, a low crystalline polyamide and an aliphatic polyester.
Claim 6
Dependent Claim
15 words
An assembly in accordance with claim 3 wherein the non-hydrophilic polymer component comprises a polyurethane.
Claim 7
Dependent Claim
45 words
An assembly in accordance with claim 46 or claim 2, wherein the hydrophilic polymeric component comprises a polymer selected from the group consisting of polyvinyl alcohol, poly(ethylene oxide), polypropylene oxide, poly(ethylene glycol) polypropylene glycol, polytetramethylene oxide, polyvinyl pyrolidene, polyacrylamide, poly(hydroxy ethyl acrylate) and poly(hydroxyethyl methacrylate).
Claim 8
Dependent Claim
20 words
An assembly in accordance with claim 5, wherein the hydrophilic polymeric component capable of forming a hydrogel comprises poly(ethylene oxide).
Claim 9
Dependent Claim
23 words
An assembly in accordance with claim 1 or claim 2, wherein said multiple phase composition comprises a physical mixture of said polymeric components.
Claim 10
Dependent Claim
15 words
An assembly in accordance with claim 1 or claim 2, wherein said composition is crosslinked.
Claim 11
Dependent Claim
22 words
An article in accordance with claim 1 or claim 2, wherein the composition has a softening ratio of at least about 6:1.
Claim 12
Dependent Claim
19 words
An article in accordance with claim 9, wherein the composition has a softening ratio of at least about 10:1.
Claim 13
Dependent Claim
22 words
An article in accordance with claim 1 or claim 2, wherein the composition has a swelling ratio of at least about 1.7:1.
Claim 14
Dependent Claim
19 words
An article in accordance with claim 11, wherein the composition has a swelling ratio of at least about 2.0:1.
Claim 15
Dependent Claim
29 words
An article in accordance with claim 1 or claim 2, wherein the composition has a tensile energy to break when hydrated of at least about 1400 N-cm/cm 3 .
Claim 16
Dependent Claim
28 words
An article in accordance with claim 1 or claim 2, wherein the composition has a 2.5% Secant modulus when hydrated of less than about 4,000 N/cm 2 .
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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) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |