US3570485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible catheter and inserting apparatus
Assignee: Baxter International Inc
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Filing: 1968-05-06
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Granted: 1971-03-16
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Expires: 1988-05-06
Abstract
Abstract A cannula is disposed about a stylet with a sharp forward end for incising the wall of an organ having a lumen for receiving the cannula from which, thereafter, the stylet is removable. The cannula may be collapsible for preventing fluid flow relative to the organ upon stylet removal, and thereafter defines a path, for inserting the catheter into the lumen. A slit extending longitudinally of the cannula may be provided to enable rapid stripping of the latter from the catheter which is longer than the cannula.
Inventors
- 👤 Richard J Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M25/0668
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
In an assembly for inserting a catheter into a lumen of a body organ having a wall-requiring breach for access to said lumen, the combination comprising: a rigid stylet having a shank and a forward end fashioned for incising said wall to gain entry to said lumen; a flexible cannula disposed intimately about said shank, said cannula being tapered at one end for insertion about said stylet into said lumen through said incised wall and to remain in said lumen after stylet removal; and said cannula defining a longitudinal slit along its entire length to permit the transverse removal of said cannula from a catheter after emplacement by withdrawal of the cannula from the body organ and passing said catheter through said slit.
Claim 2
Dependent Claim
123 words
In an assembly for inserting a catheter into a lumen of a body organ having a wall-requiring breach for access to said lumen, the combination comprising: a rigid stylet having a shank and a forward end fashioned for incising said wall to gain entry to said lumen; a flexible cannula disposed intimately about said shank, said cannula being tapered at one end for insertion about said stylet into said lumen through said incised wall and to remain in said lumen after stylet removal; and said cannula defining a longitudinal slit along its entire length to permit the transverse removal of said cannula from a catheter after emplacement by withdrawal of the cannula from the body organ and passing said catheter through said slit.
Claim 3
Dependent Claim
29 words
A combination according to claim 1 in which said cannula is defined by a collapsible wall for cutting off flow therethrough from said lumen after removal of said stylet.
Claim 4
Dependent Claim
35 words
A combination according to claim 2 in which the cannula is light transmissive and defines a channel on the outer surface of said shank for receiving fluid upon entrance of said cannula into the lumen.
Claim 5
Independent Claim
100 words
A method of inserting a catheter into a living body which comprises inserting a rigid incising stylet having a flexible cannula disposed about it into said living body; withdrawing said stylet from said cannula without withdrawing said cannula from the body; passing a flexible catheter into said body through the cannula; and thereafter withDrawing said cannula from the body without withdrawing the catheter and separating the catheter from the cannula by pulling the cannula transversely relative to the catheter through a longitudinal slit defined in said cannula, and extending for the entire length thereof, to separate said cannula and catheter.
Claim 6
Independent Claim
100 words
A method of inserting a catheter into a living body which comprises inserting a rigid incising stylet having a flexible cannula disposed about it into said living body; withdrawing said stylet from said cannula without withdrawing said cannula from the body; passing a flexible catheter into said body through the cannula; and thereafter withDrawing said cannula from the body without withdrawing the catheter and separating the catheter from the cannula by pulling the cannula transversely relative to the catheter through a longitudinal slit defined in said cannula, and extending for the entire length thereof, to separate said cannula and catheter.
Claim 7
Dependent Claim
21 words
The method of claim 4 which comprises collapsing a portion of said cannula after withdrawing said stylet to prevent flow therethrough.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |