Patent US5061256A successfully refreshed from Google Patents.
US5061256A
Expired / Lapsed
US
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Inflow cannula for intravascular blood pumps
Assignee: Medtronic Inc
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Filing: 1989-07-26
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Granted: 1991-10-29
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Expires: 2009-07-26
Abstract
Abstract An inflow cannula for intraortic blood pumps has a curved, spring-loaded body for blind retrograde insertion through the aortic arch, and a soft, beveled foldable but resilient tip which properly positions the tip, if necessary, with respect to the aortic valve prior to retrograde insertion of the distal end of the cannula through the aortic valve. Auxiliary intake openings are provided in the side walls of the cannula adjacent its distal end to prevent suction from holding the tip in its collapsed state after insertion through the aortic valve.
Inventors
- 👤 Richard K. Wampler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:07
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0069; A61M1/00; A61M1/84; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/13; A61M60/135; A61M60/139; A61M60/80; A61M60/802; A61M60/827; A61M60/829; A61M60/855; A61M60/865; A61M60/867; A61M2205/00; A61M2205/32; A61M60/148; A61M60/20; A61M60/205; A61M60/216; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/414
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
An inflow cannula for retrograde insertion of the blood intake for an intravascular blood pump through the aortic valve, comprising: (a) a substantially stiff body section adapted to be attached at is proximal end to the intake of an intravascular blood pump; and (b) a substantially soft, elongated, flexible resilient tip section at the distal end of said body section; (c) the distal end portion of said tip section being beveled and being sufficiently soft to fold upon itself when pushed into a sinus of said aortic valve; (d) said beveled distal end portion being so shaped that it folds upon itself only in a direction normal to the plane of the bevel; and (e) which said body section includes an arcuate portion biased into a shape approximating the curvature of a human aortic arch, said distal end being beveled toward the inside of said curvature.
Claim 2
Dependent Claim
146 words
An inflow cannula for retrograde insertion of the blood intake for an intravascular blood pump through the aortic valve, comprising: (a) a substantially stiff body section adapted to be attached at is proximal end to the intake of an intravascular blood pump; and (b) a substantially soft, elongated, flexible resilient tip section at the distal end of said body section; (c) the distal end portion of said tip section being beveled and being sufficiently soft to fold upon itself when pushed into a sinus of said aortic valve; (d) said beveled distal end portion being so shaped that it folds upon itself only in a direction normal to the plane of the bevel; and (e) which said body section includes an arcuate portion biased into a shape approximating the curvature of a human aortic arch, said distal end being beveled toward the inside of said curvature.
Claim 3
Dependent Claim
26 words
The cannula of claim 1, in which portions biased into a straight shape are provided in said body section on each end of said arcuate portion.
Claim 4
Dependent Claim
13 words
The cannula of claim 2, in which said bias is a spring bias.
References Cited (Backward Citations)
DE823320C
Cited
US3435826A
Cited
US3995617A
Cited
US4033331A
Cited
US4508535A
Cited
US4527549A
Cited
US4625712A
Cited
FR2568777A1
Cited
US4639252A
Cited
US4737153A
Cited
US4747840A
Cited
US4777951A
Cited
US4748984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |