Replacement mitral valve, delivery system for replacement mitral valve and methods of use
First Claim
Patent Images
1. A transseptal delivery system for replacement mitral valve implantation, the delivery system comprising:
- a nose cone shaft having a proximal end and a distal end and a lumen extending therethrough;
a nose cone provided on the distal end of the nose cone shaft;
an inner retention shaft slideably positioned over the nose cone shaft, the inner retention shaft having a proximal end and a distal end;
an inner retention ring provided on the distal end of the inner retention shaft, the inner retention ring configured to receive struts at a proximal portion of a replacement mitral valve prosthesis;
a mid shaft slideably positioned over the inner retention shaft, the mid shaft having a proximal end and a distal end;
an outer retention ring provided on the distal end of the mid shaft, the outer retention ring configured to be positioned over the inner retention ring to hold the proximal portion of the replacement mitral valve prosthesis within the inner retention ring; and
an outer sheath assembly slideably positioned over the mid shaft and over the outer retention ring, the outer sheath assembly configured to radially restrain a distal portion of the replacement mitral valve prosthesis when the proximal portion of the replacement mitral valve prosthesis is held by the outer retention ring within the inner retention ring;
wherein the mid shaft comprises a longitudinally pre-compressed tube located within the outer sheath assembly, the longitudinally pre-compressed tube having a reduced length of about ⅛
, ⅙
, ¼
, ½
, or 1 inches from a natural state, wherein the longitudinally pre-compressed tube is configured to lengthen during bending of the delivery system so that deflection of the mid shaft does not substantially change the location of the outer retention ring relative to the inner retention ring; and
wherein the mid shaft provides a distal force on the outer retention ring.
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Accused Products
Abstract
Devices, systems and methods are described herein a prosthesis for implantation within a lumen or body cavity and delivery systems for delivering the prosthesis to a location for implantation. A delivery system can include a plurality of components, including a flexible nose cone, multi-layer sheath, and pre-compressed shaft, which can be moveable relative to each other.
534 Citations
19 Claims
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1. A transseptal delivery system for replacement mitral valve implantation, the delivery system comprising:
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a nose cone shaft having a proximal end and a distal end and a lumen extending therethrough; a nose cone provided on the distal end of the nose cone shaft; an inner retention shaft slideably positioned over the nose cone shaft, the inner retention shaft having a proximal end and a distal end; an inner retention ring provided on the distal end of the inner retention shaft, the inner retention ring configured to receive struts at a proximal portion of a replacement mitral valve prosthesis; a mid shaft slideably positioned over the inner retention shaft, the mid shaft having a proximal end and a distal end; an outer retention ring provided on the distal end of the mid shaft, the outer retention ring configured to be positioned over the inner retention ring to hold the proximal portion of the replacement mitral valve prosthesis within the inner retention ring; and an outer sheath assembly slideably positioned over the mid shaft and over the outer retention ring, the outer sheath assembly configured to radially restrain a distal portion of the replacement mitral valve prosthesis when the proximal portion of the replacement mitral valve prosthesis is held by the outer retention ring within the inner retention ring; wherein the mid shaft comprises a longitudinally pre-compressed tube located within the outer sheath assembly, the longitudinally pre-compressed tube having a reduced length of about ⅛
, ⅙
, ¼
, ½
, or 1 inches from a natural state, wherein the longitudinally pre-compressed tube is configured to lengthen during bending of the delivery system so that deflection of the mid shaft does not substantially change the location of the outer retention ring relative to the inner retention ring; andwherein the mid shaft provides a distal force on the outer retention ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A flexible delivery system for replacement mitral valve implantation, the delivery system comprising:
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an outer sheath comprising a distal segment configured to cover a replacement mitral valve, wherein the distal segment is formed from an inner polymer wall and an outer polymer wall, and wherein the distal segment further comprises; a proximal section comprising a hypotube sandwiched between the inner polymer wall and the outer polymer wall; and a distal section comprising an intermediate polymer layer sandwiched between the inner and outer polymer walls; wherein a proximalmost end of the intermediate polymer layer is distal from a distalmost end of the hypotube; and a tubular polymer reinforcement in the distal section that at least partially overlaps and is separate from the intermediate polymer layer; wherein the distal section has a greater diameter than the proximal section and a transition between the distal section and the proximal section is a step; wherein the intermediate polymer layer comprises a polymer tube separate from the inner polymer wall and the outer polymer wall; wherein the hypotube comprises a slotted Nitinol hypotube separate from the inner polymer wall and the outer polymer wall; wherein the inner polymer wall is continuous between the proximal section and the distal section; wherein the outer polymer wall is continuous between the proximal section and the distal section; and wherein the outer polymer wall and inner polymer wall are connected at a plurality of locations along the distal segment. - View Dependent Claims (18, 19)
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Specification