Patent US2653308A successfully refreshed from Google Patents.
US6736846B2
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US
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Replacement semilunar heart valve
Assignee: Medtronic 3F Therapeutics Inc
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Filing: 2002-04-11
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Granted: 2004-05-18
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Expires: 2022-04-11
Abstract
Abstract A method is disclosed for using tubular material to replace a semilunar heart valve (i.e., an aortic or pulmonary valve). To create such a replacement valve, the native valve cusps are removed from inside an aorta or pulmonary artery, and the inlet end of a tubular segment is sutured to the valve annulus. The outlet (distal) end of the tube is either “tacked” at three points distally, or sutured longitudinally along three lines; either method will allow the flaps of tissue between the suture lines to function as movable cusps. This approach generates flow patterns that reduce turbulence and closely duplicate the flow patterns of native semilunar valves. An article of manufacture is also disclosed, comprising a sterile biocompatible synthetic material which has been manufactured in tubular form, by methods such as extrusion or coating a cylindrical molding device, to avoid a need for a suture line or other seam to convert a flat sheet of material into a tubular shape. The synthetic tube is packaged within a sealed watertight enclosure that maintains sterility of the tube.
Inventors
- 👤 James Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:11
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/36; A61L27/38; A61L27/3839; A61L27/3843; A61F; A61F2/00; A61F2/0095; A61F2/02; A61F2/24; A61F2/2412; A61L27/3604; A61L27/3629; A61L27/3641; A61L27/3645; A61L27/50; A61L27/507; G; G06; G06Q; G06Q40/00; G06Q40/04; A61L2430/00; A61L2430/20; Y; Y10; Y10S; Y10S623/00; Y10S623/90; Y10S623/901
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
161 words
A replacement semilunar heart valve for placement in a ventricular outflow artery of a patient, comprising an elongate, substantially tubular segment comprising: a plurality of thin and flexible wall portions that are formed into said tubular segment by stitching said wall portions longitudinally along said segment; an inlet end and an outlet end, the inlet end sized and adapted to be circumferentially secured substantially at a valve annulus formed by removing a native semilunar heart valve; three securement locations adjacent the outlet end and spaced from each other, each of the securement locations adapted to be attached to a wall of the artery by means of one or more sutures; three unconstrained regions between the securement locations, each of the unconstrained regions adapted to flex inwardly into and out of engagement with others of the unconstrained regions; and wherein at least a portion of the outlet end is adapted to be spaced from the artery wall when the valve is open.
Claim 2
Dependent Claim
161 words
A replacement semilunar heart valve for placement in a ventricular outflow artery of a patient, comprising an elongate, substantially tubular segment comprising: a plurality of thin and flexible wall portions that are formed into said tubular segment by stitching said wall portions longitudinally along said segment; an inlet end and an outlet end, the inlet end sized and adapted to be circumferentially secured substantially at a valve annulus formed by removing a native semilunar heart valve; three securement locations adjacent the outlet end and spaced from each other, each of the securement locations adapted to be attached to a wall of the artery by means of one or more sutures; three unconstrained regions between the securement locations, each of the unconstrained regions adapted to flex inwardly into and out of engagement with others of the unconstrained regions; and wherein at least a portion of the outlet end is adapted to be spaced from the artery wall when the valve is open.
Claim 3
Dependent Claim
35 words
A heart valve as in claim 1 , wherein the securement locations are positioned so as to engage the artery wall at substantially the same locations vacated by the cusps of the removed native valve.
Claim 4
Dependent Claim
15 words
A heart valve as in claim 1 , wherein the outlet end is slightly scalloped.
Claim 5
Dependent Claim
16 words
A heart valve as in claim 1 , wherein the securement locations are about 120° apart.
Claim 6
Dependent Claim
19 words
A heart valve as in claim 1 , additionally comprising longitudinal suture lines substantially aligned with the securement locations.
Claim 7
Dependent Claim
19 words
A heart valve as in claim 1 , wherein the wall portion comprises pinched junctures at the securement locations.
Claim 8
Dependent Claim
15 words
A heart valve as in claim 6 , additionally comprising reinforcements adjacent the securement locations.
Claim 9
Dependent Claim
48 words
A heart valve as in claim 1 , wherein the outlet end comprises at least a portion of each of the three unconstrained portions, and at least a portion of each unconstrained portion at the outlet end is spaced from the artery wall when the valve is open.
References Cited (Backward Citations)
US3587115A
Cited
US3608097A
Cited
US3671979A
Cited
US3988782A
Cited
US3898701A
Cited
US3966401A
Cited
US4011947A
Cited
US4065816A
Cited
US4108161A
Cited
US4106129A
Cited
US4056854A
Cited
US4297749A
Cited
US4306318A
Cited
US4261342A
Cited
US4222126A
Cited
US4211325A
Cited
US4343048A
Cited
EP0051451A2
Cited
US4470157A
Cited
US4501030A
Cited
EP0103546B1
Cited
US4601718A
Cited
US4801299A
Cited
US4545783A
Cited
US4612011A
Cited
US4626255A
Cited
US4629459A
Cited
US4512471A
Cited
US4697703A
Cited
EP0276975A1
Cited
US4790844A
Cited
US4750619A
Cited
US5031762A
Cited
US4838288A
Cited
US4960424A
Cited
US4863016A
Cited
US5037434A
Cited
US5411552A
Cited
US5840081A
Cited
US5415667A
Cited
US5197979A
Cited
US5163955A
Cited
US5344442A
Cited
US5500015A
Cited
US5713953A
Cited
US5370685A
Cited
US5332402A
Cited
EP0581233A1
Cited
US5733331A
Cited
US5385229A
Cited
US5607477A
Cited
US5460962A
Cited
US5824067A
Cited
US5824065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-05-18 | 2007-11-17 | 2008-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-05-18 | 2011-11-17 | 2012-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-05-18 | 2015-11-17 | 2016-05-18 | $7700.00 | Window Closed / Lapsed |