JPWO2021041294A5

JPWO2021041294A5 -

Info

Publication number: JPWO2021041294A5
Application number: JP2021574851A
Authority: JP
Publication date: 2023-09-01

Claims

A prosthetic heart valve,
A radially expandable and compressible annular frame comprising a plurality of struts, the plurality of struts comprising separate inner and outer struts, the outer struts pivoting to adjacent inner struts. frames overlapping at a joint such that radial expansion or compression of the annular frame causes the inner strut to pivot relative to the outer strut at the pivot joint;
a valve structure mounted within the frame that regulates blood flow through the prosthetic heart valve;
A prosthetic heart valve wherein at least some of said plurality of struts comprise a recessed portion at said pivot joint, and segments of other struts of said plurality of struts are seated within said recessed portion at said pivot joint.

2. The valve of claim 1, wherein at least some of the outer struts comprise concave portions, and segments of at least some of the inner struts are seated within the concave portions.

2. The valve of claim 1, wherein at least some of the inner struts comprise concave portions, and segments of at least some of the outer struts are seated within the concave portions.

2. The claim 1, wherein at least some of the inner struts comprise recessed portions that receive segments of the outer struts, and at least some of the outer struts comprise recessed portions that receive segments of the inner struts. valve.

said pivot joint seating said segment within said recessed portion has a generally continuous inner surface such that an inner surface of said seated segment and an adjacent inner surface of said strut joined to said seated segment; 2. The valve of claim 1 , having generally equal radial dimensions from a centerline of the frame.

said pivot joint seating said segment within said recessed portion has a generally continuous outer surface such that an outer surface of said seated segment and an adjacent outer surface of said strut joined to said seated segment; 2. The valve of claim 1 , having generally equal radial dimensions from a centerline of the frame.

At least some of the struts comprise two or more recessed portions located at respective pivot joints, segments of other struts of said struts being within said two or more recessed portions of said respective pivot joints. 2. The valve of claim 1 , wherein the valve is seated in a

2. The valve of claim 1 , wherein the frame further comprises a pin coupling the concave portion to the segment seated within the concave portion at the pivot joint.

2. The valve of claim 1 , wherein said recessed portion has a depth approximately equal to the thickness of said segment seated within said recessed portion.

2. The valve of claim 1 , wherein leaflets of the valve structure are attached to the struts that include the concave portion.

2. At least some of said struts comprise concave end portions, other of said struts having end segments seated in said concave end portions and forming pivot joints at extremities of said frames. the valve described in .

A method of radially compressing a prosthetic heart valve comprising:
a set of outer struts and a set of inner struts of the mechanical frame of the mechanical frame of the prosthetic heart valve such that the outer struts and the inner struts approach parallel to the axial dimension of the frame; pivoting the inner struts relative to each other at a plurality of pivot joints at which the outer struts overlap to reduce the radius;
The outer struts comprise recessed portions at the pivot joints and segments of the inner struts are seated within the recessed portions of the outer struts at the pivot joints, thus radially inner surfaces of the outer struts between the pivot joints. has an inner radius equal to the radially inner surface of the inner strut between the pivot joints;
reduction of the radius of the frame causes radial compression of a valve structure mounted within the frame;
radially inner surfaces of both the outer struts and the inner struts between the pivot joints are substantially continuous with respect to the valve structure as the outer and inner struts approach parallel to the axial dimension of the frame; maintaining good radial contact.

13. The claim 12 , wherein the inner surface of a seated segment of the inner strut and an adjacent inner surface of the outer strut joined to the seated segment have approximately equal radial dimensions from an axial centerline of the frame. the method of.

wherein said outer struts each comprise two or more recessed portions located at respective pivot joints, said inner struts being seated within said two or more recessed portions of said outer struts at respective pivot joints. 13. The method of paragraph 12 .

13. The method of claim 12 , wherein said recessed portion has a depth approximately equal to the thickness of said segment seated within said recessed portion.

13. The method of claim 12 , wherein leaflets of the valve structure are attached to the outer strut between the pivot joints.

A method of implanting a prosthetic heart valve comprising:
positioning the prosthetic heart valve in a radially compressed state in a native heart valve region of the heart;
a set of outer struts and a set of inner struts of the mechanical frame of the mechanical heart valve prosthesis, wherein the outer struts and the inner struts extend parallel to the axial dimension of the frame so that the frame pivoting the inner struts relative to each other at a plurality of pivot joints at which the outer struts overlap so as to spread axially;
The inner struts comprise recessed portions at the pivot joints and segments of the outer struts are seated within the recessed portions of the inner struts at the pivot joints, thus radially outer surfaces of the inner struts between the pivot joints. has an outer radius equal to the radially outer surface of the outer strut between the pivot joints;
The radial expansion of the frame causes the radially outer surfaces of the outer struts and the inner struts to uniformly press against the native tissue of the native heart valve region, and to align when the frame is radially expanded. forming a paravalvular seal against said native tissue.

4. The radially outer surface of the seated segment of the outer strut and the adjacent outer surface of the inner strut joined to the seated segment having approximately equal radial dimensions from the axial centerline of the frame. The method described in 17 .

The inner struts each comprise two or more recessed portions located at respective pivot joints, and wherein the outer struts are seated within the two or more recessed portions of the inner struts at respective pivot joints. 18. The method of paragraph 17 .

18. The method of claim 17 , wherein said recessed portion has a depth approximately equal to the thickness of said segment seated within said recessed portion.