US3814137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection site for flow conduits containing biological fluids
Assignee: Baxter International Inc
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Filing: 1973-01-26
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Granted: 1974-06-04
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Expires: 1993-01-26
Abstract
Abstract An injection site for a flow conduit for biological fluids and the like, such as blood or parenteral solutions, is provided having improved resistance to leakage through needle punctures, even when the pressure within the flow conduit is substantially different from the pressure outside of the conduit. The conduit comprises tubing made of a biologically compatible material, in which a portion of the tubing is surrounded by an elastomeric sleeve injection site. A second elastic sleeve surrounds the first elastomeric sleeve, the second sleeve having an unstretched inner diameter which is less than the outer diameter of the elastomeric sleeve. As a result, the elastomeric sleeve is compressed by the second sleeve, whereby the sealing of the elastomeric sleeve after puncture by a needle is improved.
Inventors
- 👤 F Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:51
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
In a conduit for blood and the like which comprises needle puncturable, biologically compatible tubing, a portion of said tubing being surrounded by an elastomeric sleeve injection site, the improvement comprising a seconD, elastic sleeve surrounding said elastomeric sleeve, said second sleeve having an unstretched inner diameter which is less than the outer diameter of said puncturable tubing, to compress said elastomeric sleeve, whereby the sealing of said elastomeric sleeve after puncture by a needle is improved, and in which said second, elastic sleeve is longer than said elastomeric sleeve and overlies the ends of said elastomeric sleeve, to seal the ends of said elastomeric sleeve against fluid leakage between the elastomeric sleeve and the tubing.
Claim 2
Dependent Claim
116 words
In a conduit for blood and the like which comprises needle puncturable, biologically compatible tubing, a portion of said tubing being surrounded by an elastomeric sleeve injection site, the improvement comprising a seconD, elastic sleeve surrounding said elastomeric sleeve, said second sleeve having an unstretched inner diameter which is less than the outer diameter of said puncturable tubing, to compress said elastomeric sleeve, whereby the sealing of said elastomeric sleeve after puncture by a needle is improved, and in which said second, elastic sleeve is longer than said elastomeric sleeve and overlies the ends of said elastomeric sleeve, to seal the ends of said elastomeric sleeve against fluid leakage between the elastomeric sleeve and the tubing.
Claim 3
Dependent Claim
27 words
The blood conduit of claim 1 in which the wall thickness of said second sleeve is less than one half the wall thickness of said elastomeric sleeve.
Claim 4
Dependent Claim
16 words
The blood conduit of claim 2 in which said elastomeric sleeve is made of natural latex.
Claim 5
Dependent Claim
16 words
The blood conduit of claim 3 in which said second sleeve is made of natural latex.
Claim 6
Dependent Claim
26 words
The blood conduit of claim 4 in which said tubing is made of a material selected from the group consisting of vinyl plastisol, polyurethane, and silicone.
Claim 7
Dependent Claim
76 words
The blood conduit of claim 2 in which said tubing has an inner diameter of about 0.18 to 0.2 inch and a wall thickness of about 0.06 to 0.07 inch; said elastomeric sleeve has an unstretched inner diameter of about 0.2 to 0.3 inch and a wall thickness of about 0.09 to 0.1 inch, and said second, elastic sleeve has an unstretched inner diameter of about 0.25 inch and a wall thickness of about 0.03 inch.
Claim 8
Dependent Claim
29 words
The blood conduit of claim 1 in which the unstretched outer diameter of said elastomeric sleeve is at least two times the inner diameter of said second elastic sleeve.
Claim 9
Dependent Claim
25 words
The blood conduit of claim 1 in which the inner diameter of said second sleeve is less than the inner diameter of said elastomeric sleeve.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |