US3710744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for manufacture of heart valve
Assignee: Bayer Corp
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Filing: 1971-02-24
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Granted: 1973-01-16
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Expires: 1991-02-24
Abstract
Abstract A method and device for the manufacture of a replacement heart valve made of a heart valve ring or frame having a metal ring base and struts and being covered with suture-accepting fabric and tissue. A rotatable valve ring holder has a means to hold the ring firmly and is movable axially. Opposed to the holder on a common axis is a rotatable arbor adapted to hold, successively, a primary mandrel and a secondary cusp-forming mandrel. The primary mandrel is provided with recesses in its side wall so as to nest with the ring and its struts and to enable wrapping and securing in place, e.g., by stapling, a precisely sized strip of animal, advantageously autologous, tissue to cover surfaces of the valve ring. The secondary mandrel is inserted in the arbor after removal of the first mandrel, and it is provided with pivotally attached arms. Each arm has a block at its end with a protruding, interior surface to hold the tissue cusps in coaptation, there being a corresponding number of such arms and blocks and such cusps. The tissue is sutured to the ring while the cusps are so held by the secondary mandrel, and thereafter the finished heart valve is removed from the device or assembly.
Inventors
- 👤 S Goodenough
- 👤 R Brown
- 👤 B Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:19
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2415; Y; Y10; Y10S; Y10S623/00; Y10S623/901; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7885
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
118 words
A device for the production of a heart valve which comprises in combination: means of aligning two independent rotatable arbors, each said arbor having at least one detachable holding member, along a common axis, means of detachably securing a valve frame to a first said holding member of one said arbor, means to bring a second said holding member of the other said arbor into abutting relationship with said first holding member holding said valve frame, said second holding member tapering outwardly from the area of abutment to provide a frusto-conical shape to tissue that may be applied thereto, and means to hold said tissue to form a plurality of cusps in coaptation position on said valve frame.
Claim 2
Independent Claim
118 words
A device for the production of a heart valve which comprises in combination: means of aligning two independent rotatable arbors, each said arbor having at least one detachable holding member, along a common axis, means of detachably securing a valve frame to a first said holding member of one said arbor, means to bring a second said holding member of the other said arbor into abutting relationship with said first holding member holding said valve frame, said second holding member tapering outwardly from the area of abutment to provide a frusto-conical shape to tissue that may be applied thereto, and means to hold said tissue to form a plurality of cusps in coaptation position on said valve frame.
Claim 3
Independent Claim
125 words
A device for making a heart valve which comprises in combination: a first and a second rotatable arbor, said arbors being aligned along a common axis in lathe-like fashion, each said arbor having a detachable holding member likewise aligned therewith, means to detachably affix a heart valve frame to one said holding member on said second arbor, means to bring said other holding member on said first arbor into abutting relationship with a heart valve frame on said one holding member when in operation, whereby a strip of later-applied tissue is accommodated to form a frusto-conical shape, and a third holding member successively affixable to said first arbor to coact with said valve frame to hold said later-applied tissue in coapting cusp position for suturing.
Claim 4
Independent Claim
125 words
A device for making a heart valve which comprises in combination: a first and a second rotatable arbor, said arbors being aligned along a common axis in lathe-like fashion, each said arbor having a detachable holding member likewise aligned therewith, means to detachably affix a heart valve frame to one said holding member on said second arbor, means to bring said other holding member on said first arbor into abutting relationship with a heart valve frame on said one holding member when in operation, whereby a strip of later-applied tissue is accommodated to form a frusto-conical shape, and a third holding member successively affixable to said first arbor to coact with said valve frame to hold said later-applied tissue in coapting cusp position for suturing.
Claim 5
Dependent Claim
192 words
In a lathe-like device or assembly for production of a heart valve and having a longitudinal axis, the improved combination including: a. a rotatable arbor, b. a rotatable heart valve ring holder disposed opposite said arBor on a common longitudinal axis and spaced therefrom, and movable along said axis, c. said heart valve ring holder having at its forward end a radially expandible valve ring holding element, d. a primary mandrel of generally frusto-conical shape tapering toward the top and having a plurality of recesses in the side wall thereof parallel to said longitudinal axis, e. a secondary mandrel having a top surface and a plurality of arms pivotally attached to said surface and extending therefrom toward said valve ring holder, f. said primary and secondary mandrels being successively affixed detachably to said arbor, g. a block attached at the outer end of each said arm and having a protruding surface at the inner portion of each said block adapted to maintain a cusp shape to applied tissue in coaptation position therewith, h. means to hold said arms in position, and i. means to maintain said valve ring holder in desired position.
Claim 6
Dependent Claim
192 words
In a lathe-like device or assembly for production of a heart valve and having a longitudinal axis, the improved combination including: a. a rotatable arbor, b. a rotatable heart valve ring holder disposed opposite said arBor on a common longitudinal axis and spaced therefrom, and movable along said axis, c. said heart valve ring holder having at its forward end a radially expandible valve ring holding element, d. a primary mandrel of generally frusto-conical shape tapering toward the top and having a plurality of recesses in the side wall thereof parallel to said longitudinal axis, e. a secondary mandrel having a top surface and a plurality of arms pivotally attached to said surface and extending therefrom toward said valve ring holder, f. said primary and secondary mandrels being successively affixed detachably to said arbor, g. a block attached at the outer end of each said arm and having a protruding surface at the inner portion of each said block adapted to maintain a cusp shape to applied tissue in coaptation position therewith, h. means to hold said arms in position, and i. means to maintain said valve ring holder in desired position.
Claim 7
Dependent Claim
21 words
The device or assembly of claim 3 having means to hold said valve ring holder in desired position along said axis.
Claim 8
Dependent Claim
33 words
The device or assembly of claim 4 wherein said valve ring holder has at least two annular recesses and said means to hold said holder is a ball detent to engage said recesses.
Claim 9
Dependent Claim
18 words
The device or assembly of claim 3 having means to hold said blocks in contact with said cusps.
Claim 10
Dependent Claim
22 words
The device or assembly of claim 6 wherein said means to hold is a metal ring surrounding said arms and movable thereover.
Claim 11
Dependent Claim
28 words
The device or assembly of claim 3 wherein said secondary mandrel has three of said arms and said device or assembly is adapted to form a tricuspid valve.
Claim 12
Dependent Claim
38 words
The device or assembly of claim 3 wherein said primary mandrel has three said recesses adapted to receive three struts of a later-inserted valve ring in nesting fit and said mandrel is adapted to form a tricuspid valve.
Claim 13
Dependent Claim
40 words
The device or assembly of claim 3 wherein said secondary mandrel has three of said blocks and said protruding surface is of substantially triangular cross-section taken perpendicularly to said arm, and said device is adapted to form a tricuspid valve.
Claim 14
Independent Claim
176 words
A method for making a heart valve from a fabric covered frame having a ring base and a plurality of struts extending generally axially from said ring base, and from animal tissue, comprising fixedly supporting said ring base, abutting said struts with a frusto-conical mandrel, draping tissue on said frame and mandrel, securing said tissue to said struts, withdrawing said mandrel, taking a single stitch through said tissue through the center of each cusp, extending the free ends of said single stitch to position the free edges of said tissue while simultaneously and uniformly forcing in said tissue toward the axis of said frame at all locations midway between struts, to form a plurality of cusps having a common vertex distant from the ring, forcing in said tissue further toward said axis, simultaneously and uniformly, to take up slack in the tissue, suturing said tissue to the fabric covering of each said strut and to the fabric covering of said ring base, releasing the tissue from the pressure forcing it in, and withdrawing said single stitch.
Claim 15
Independent Claim
176 words
A method for making a heart valve from a fabric covered frame having a ring base and a plurality of struts extending generally axially from said ring base, and from animal tissue, comprising fixedly supporting said ring base, abutting said struts with a frusto-conical mandrel, draping tissue on said frame and mandrel, securing said tissue to said struts, withdrawing said mandrel, taking a single stitch through said tissue through the center of each cusp, extending the free ends of said single stitch to position the free edges of said tissue while simultaneously and uniformly forcing in said tissue toward the axis of said frame at all locations midway between struts, to form a plurality of cusps having a common vertex distant from the ring, forcing in said tissue further toward said axis, simultaneously and uniformly, to take up slack in the tissue, suturing said tissue to the fabric covering of each said strut and to the fabric covering of said ring base, releasing the tissue from the pressure forcing it in, and withdrawing said single stitch.
Claim 16
Dependent Claim
17 words
The method of claim 11 wherein the fixedly supported ring base is rotated during the suturing step.
Claim 17
Dependent Claim
22 words
The method of claim 11 wherein said securing step is done by stapling the tissue to the fabric covering of the struts.
Claim 18
Dependent Claim
14 words
The method of claim 13 wherein the staples are removed after the suturing step.
Claim 19
Dependent Claim
22 words
The method of claim 11 wherein the ring base is withdrawn from its fixed support at a time following said releasing step.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |