US4451256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter set
Assignee: B Braun Surgical AG
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Filing: 1982-04-28
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Granted: 1984-05-29
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Expires: 2002-04-28
Abstract
Abstract In order to keep the opening for inserting a catheter into a blood vessel as small as possible, a catheter insertion tube is used which coaxially surrounds the puncturing canula and consists, at least in a circumferential area and/or at least along a portion of its length, of one or several dilatable or expandable areas permitting enlargement of its internal diameter. The diameter of the catheter insertion tube, at the front end where it is inserted into the blood vessel, is approximately equal or smaller than the outer diameter of the catheter. The catheter insertion tube is expandable at least over the front or forward portion of its length by the catheter. The catheter insertion tube i removable from the puncture over the catheter while the catheter is advanced into the puncture and is tighty sealed by the catheter because the catheter has an external diameter equal to or larger than the puncture previously occupied by the insertion tube.
Inventors
- 👤 Andreas Weikl
- 👤 Max Hubmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:54
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M25/0668
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
132 words
In a catheter set including a catheter and a catheter insertion tube into which the catheter to be inserted into a blood vessel is insertable, the improvement comprising: a catheter having an elongated soft and flexible front end portion with an external diameter smaller than the external diameter of the main body of the catheter; a catheter insertion tube having a front end portion with an internal diameter smaller than the external diameter of the main body of the catheter; the elongated smaller front end portion of the catheter being axially slidable in the catheter insertion tube front end portion so as to project partially out thereof without expanding the same; and the front end portion of the catheter insertion tube being expandable by movement of the catheter main body axially therein.
Claim 2
Dependent Claim
132 words
In a catheter set including a catheter and a catheter insertion tube into which the catheter to be inserted into a blood vessel is insertable, the improvement comprising: a catheter having an elongated soft and flexible front end portion with an external diameter smaller than the external diameter of the main body of the catheter; a catheter insertion tube having a front end portion with an internal diameter smaller than the external diameter of the main body of the catheter; the elongated smaller front end portion of the catheter being axially slidable in the catheter insertion tube front end portion so as to project partially out thereof without expanding the same; and the front end portion of the catheter insertion tube being expandable by movement of the catheter main body axially therein.
Claim 3
Dependent Claim
36 words
The improvement according to claim 1 in which the catheter main body external diameter is not less than the external diameter of the front end portion of the catheter insertion tube at a blood vessel puncture.
Claim 4
Dependent Claim
18 words
The improvement according to claim 1 in which the catheter insertion tube expandable front end comprises elastic material.
Claim 5
Dependent Claim
25 words
The improvement according to claim 1 in which the catheter insertion tube expandable front end has a longitudinal dividable area parallel to the tube axis.
Claim 6
Dependent Claim
29 words
The improvement according to claim 1 including a mandrin having an outer diameter not larger than the internal diameter of the catheter insertion tube front end portion internal diameter.
Claim 7
Dependent Claim
165 words
In a catheter set comprising a puncturing canula, a catheter and a catheter insertion tube into which tube said catheter to be inserted into a blood vessel is insertable, the improvement comprising: a catheter with a reduced insertion end; and a catheter insertion tube having a dilatable elastic area along at least a portion of its length permitting expansion of the tube dilatable area by insertion said catheter into the tube to expand the catheter insertion tube and permitting removal of the tube from the blood vessel over the catheter so that enlargement of the blood vessel puncture is substantially eliminated so it can be tightly sealed by inserting the catheter into the puncture; said catheter having a body with an end projection, at least as long as the catheter insertion tube, with an outer diameter smaller than the catheter insertion tube inner diameter and with the catheter body outer diameter at least as large as the catheter insertion tube outer diameter at the puncture.
Claim 8
Dependent Claim
165 words
In a catheter set comprising a puncturing canula, a catheter and a catheter insertion tube into which tube said catheter to be inserted into a blood vessel is insertable, the improvement comprising: a catheter with a reduced insertion end; and a catheter insertion tube having a dilatable elastic area along at least a portion of its length permitting expansion of the tube dilatable area by insertion said catheter into the tube to expand the catheter insertion tube and permitting removal of the tube from the blood vessel over the catheter so that enlargement of the blood vessel puncture is substantially eliminated so it can be tightly sealed by inserting the catheter into the puncture; said catheter having a body with an end projection, at least as long as the catheter insertion tube, with an outer diameter smaller than the catheter insertion tube inner diameter and with the catheter body outer diameter at least as large as the catheter insertion tube outer diameter at the puncture.
Claim 9
Dependent Claim
21 words
The improvement according to claim 6 in which the catheter insertion tube has a discreet dilatable area over its entire length.
Claim 10
Dependent Claim
15 words
The improvement according to claim 7 in which the dilatable area consists of elastic material.
Claim 11
Dependent Claim
16 words
The improvement according to claim 7 in which the dilatable area includes zones of reduced strength.
Claim 12
Dependent Claim
21 words
The improvement according to claim 7 in which the dilatable area is a longitudinal dividable area parallel to the tube axis.
Claim 13
Dependent Claim
14 words
The improvement according to claim 10 in which the dividable area includes longitudinal slits.
Claim 14
Dependent Claim
15 words
The improvement according to claim 11 in which the dividable area includes overlapping step-like portions.
Claim 15
Dependent Claim
17 words
The improvement according to claim 6 in which the projection is tubular and has a uniform diameter.
Claim 16
Dependent Claim
21 words
The improvement according to claim 13 in which the opening in the projection is equal in diameter to the catheter opening.
Claim 17
Dependent Claim
23 words
The improvement according to claim 6, 13 or 14 in which the projection is at least as long as the catheter insertion tube.
References Cited (Backward Citations)
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |