IMPLANTABLE MECHANICAL HEART VALVE ASSEMBLY

• US 20100312335A1
• Filed: 12/01/2008
• Published: 12/09/2010
• Est. Priority Date: 12/06/2007
• Status: Active Grant

• Current Assignee: Valikapathalil Mathew Kurian
• Original Assignee: Valikapathalil Mathew Kurian
• Inventors: Kurian, Valikapathalil Mathew
• Granted Patent: US 8,167,936 B2
• Time in Patent Office: Days
• US Class Current: 623/2.41
• CPC Class Codes: A61F 2/2409 Support rings therefor, e.g. for connecting valves to tissue annuloplasty rings A61F2/2442
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation

Abstract

A mechanical heart valve implantable as heart valve replacement comprising of an annular valve body with a central orifice and an exterior surface incorporating a suture ring having a plurality of suture tunnels, and a valve implantation flap assembly disposed on the valve body surface and wrapping around the suture ring. The inside lumen carries the occluder mechanism. The valve holder comprises of at least two parts, both parts having suture guiding grooves on the outer surface corresponding to and matching with the tunnels on the suture ring, such as to form a continuous path for the sewing material. The parts of the valve holder can be detached separately from the valve after taking all the sutures, the part on the ventricular side before lowering the valve into the heart and the other part after lowering and positioning the heart valve in the; desired position inside the heart.

Claims

1. An implantable mechanical heart valve assembly comprising a mechanical heart valve with two portions:

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a. a first portion of an annular valve body (1) with an exterior surface incorporating a suture ring (2) having suture tunnels (10); and

b. a second portion of valve implantation flap assembly (3) disposed on the valve body surface and wrapping the suture ring (2), the said suture ring formed as a protrusion on the peripheral wall surface of the valve body.

3. An implantable mechanical heart valve assembly as claimed in claims 1 &

2, wherein the said valve body (1) having an annular cylindrical shape with an external circumferential surface configured as circumferential cylindrical protrusion to form a concentric suture ring (2), said suture ring (2) comprising;

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(i) an inside (4) and an outside (5) diameter so as to surround around the valve body substantially in central portion but not extending up to the two peripheral edges of the valve body (1), the circumferential surface of the said suture ring (2) configured as external circumferential wall formed around the suture ring (2) which is substantially centered with respect to the valve body (1) height;

(ii) a top and a bottom planar surfaces (9) enclosing the top end and the bottom end of the suture ring (2) to the valve body (1); and

(iii) a plurality of suture tunnels (10) formed between the said top and bottom surfaces and extending through the suture ring (2), each suture tunnel (10) forming a pathway with opening at two extreme ends to facilitate the passage of the sewing material through the suture ring (2) of the valve body (1) for sewing of the valve to the heart tissues.

4. An implantable mechanical heart valve assembly as claimed in claim 1 &

2, wherein the said valve implantation flap assembly (3) dimensioned in medial portion (6) to fit onto the suture ring (2) and comprising;

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a circular medial portion (6) wrapping around the suture ring (2) with a pair of protruding legs (7) extending towards the valve body (1) and adapted to be disposed above the top and below the bottom planar surfaces (9) of the suture ring (2) and also covering the suture tunnels (10) formed therein; and

a pair of extending flap portions (8) formed on either side beyond the medial portion (6) and extending away from the valve body (1).

5. An implantable mechanical heart valve assembly as claimed in claim 4, wherein the said valve implantation flap assembly (3) is secured onto the suture ring (2) of the valve body (1) through the suture tunnels (10) to form the mechanical heart valve assembly.

6. An implantable mechanical heart valve assembly as claimed in claim 3, wherein the suture tunnel comprises of an inside wall, an outside wall and two lateral walls, and further the valve body forming the inside wall.

7. An implantable mechanical heart valve assembly as claimed in claim 6, wherein the inside wall of the suture tunnel is flat, the two lateral walls and the outside wall are convex facing the tunnel, such as the pathway has the shape of a split half of an hour glass.

8. An implantable mechanical heart valve assembly as claimed in claims 1 &

2, wherein the said valve implantation flap assembly is configured such that the fabric material is more closely knit in the medial portion than at the flap portions extending on either side.

9. An implantable mechanical heart valve assembly as claimed in claims 1 &

2, wherein the said valve implantation flap assembly is configured as a unitary structure with a single layer material or with multiple layers of material.

10. An implantable mechanical heart valve assembly as claimed in claims 1 &

2, wherein the said implantation flap assembly material is selected from knit fabric, woven fabric, or PTFE.

2. An implantable mechanical heart valve assembly comprising a valve and a valve holder wherein the valve comprises of two portions, a first portion of an annular valve body (1) with an exterior surface incorporating a suture ring (2) having suture tunnels (10);

and a second portion of valve implantation flap assembly (3) disposed on the valve body surface and wrapping the suture ring (2), the said suture ring formed as a protrusion on the peripheral wall surface of the valve body, and wherein the valve holder also comprises of two parts (18,19) adapted to be arranged at the opposite ends of the valve having suture guiding grooves (20) corresponding to the suture tunnels (10).

11. An implantable mechanical heart valve assembly as claimed in claim 2, wherein the valve is mounted on a valve holder which comprises of at least two parts, one at each end of the valve, both parts having suture guiding grooves on the outer surface corresponding to and matching with the suture tunnels on the suture ring, such as to form a continuous path for the sewing material.

12. A valve holder as claimed in claim 2, wherein the valve holder is detachable from the valve.

13. An implantable mechanical heart valve assembly as claimed in claim 2, wherein the said valve holder and valve are detachable from each other when valve is in place.

14. An implantable mechanical heart valve assembly as claimed in claim 2, wherein at least one portion of the valve holder has a handle.

15. An implantable mechanical heart valve assembly as claimed in claim 2, wherein the portion without handle is detached from the valve after suturing through the valve.

16. An implantable mechanical heart valve assembly as claimed in claim 2, wherein portion with the handle is detached from the valve after placing valve in position.