US20080140189A1 Active / In Force US ⏱️ 1.1 years remaining

System and method for transapical delivery of an annulus anchored self-expanding valve

Assignee: Medtronic CV Luxembourg SARL

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Filing: 2007-12-06

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Granted: —

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Expires: 2027-12-06

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Abstract

Abstract A prosthetic valve assembly for use in replacing a deficient native valve comprises a replacement valve supported on an expandable prosthesis frame. The valve may be delivered transluminally or transmyocardially using a thorascopic or other limited access approach using a delivery catheter. Preferably, the initial partial expansion of the valve is performed against the native valve annulus to provide adequate anchoring and positioning of the valve as the remaining portions of the valve expand. The valve may be delivered using a retrograde or antegrade approach. When delivered using a retrograde approach, a delivery catheter with a pull-back sheath may be used, while antegrade delivery is preferably performed with a delivery catheter with a push-forward sheath that releases the proximal end of the valve first.

Inventors

👤 Than Nguyen
👤 Jacques Seguin
👤 Stan Komatsu
👤 Hung Nguyen
👤 Georg Boertlein

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-23 01:49

CPC Classifications

A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2427; A61F2/2418; A61F2/243; A61F2/2433; A61F2/2436; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2/2439; A61F2/92; A61F2/93; A61F2/95; A61F2002/9155; A61F2002/91591; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2220/0025; A61F2220/005; A61F2220/0058; A61F2220/0075; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/005; A61F2230/0054; A61F2230/0063; A61F2230/0067; A61F2230/0073; A61F2230/0078; A61F2250/00; A61F2250/0003; A61F2250/0058; A61F2250/0069

Claims Analysis

Total Claims: 22

Claim 1

Independent Claim 102 words

1 . A replacement cardiac valve system, comprising: a delivery catheter comprising a catheter body, a retaining structure attached to the distal end of the catheter body and a restraining sheath movably coupled to the distal end of the catheter body; and an expandable heart valve collapsible into the restraining sheath and coupled to the retaining structure of the delivery catheter at an outflow end of the expandable heart valve; wherein the restraining sheath comprises a proximal closed position configured to restrain the expandable heart valve and a distal exposed position that exposes at least a portion of the expandable heart valve.

Claim 2

Dependent Claim 102 words

Claim 3

Dependent Claim 26 words

2 . The replacement cardiac valve system as in claim 1 , further comprising a taper segment on the delivery catheter proximal to the restraining sheath.

Claim 4

Dependent Claim 26 words

3 . The replacement cardiac valve system as in claim 1 , wherein the restraining sheath further comprises a release position that exposes the retaining structure.

Claim 5

Dependent Claim 26 words

4 . The replacement cardiac valve system as in claim 1 , further comprising a taper segment on the delivery catheter distal to the restraining sheath.

Claim 6

Dependent Claim 86 words

5 . A catheter for delivering a self expandable prosthesis, the catheter comprising an elongate body; a distal portion having a section around which the prosthesis can be mounted; and a sheath having a proximal end, and being movable over the prosthesis mounting section in a distal direction from a position substantially covering the prosthesis mounting section to a position substantially uncovering the prosthesis mounting section, such that, in use, movement of the proximal end of the sheath exposes a prosthesis placed in the mounting section.

Claim 7

Dependent Claim 86 words

Claim 8

Dependent Claim 25 words

6 . A catheter as in claim 5 , wherein the distal portion comprises a zone of reduced cross-section to form the prosthesis mounting section.

Claim 9

Dependent Claim 68 words

7 . A catheter as in claim 6 , wherein the prosthesis mounting section comprises a proximal end and the catheter further comprises a projection adjacent the proximal end of the mounting section configured to cooperate with the proximal end of the sheath to minimize interference between the proximal end of the sheath and a deployed prosthesis when, in use, the catheter is withdrawn through the deployed prosthesis.

Claim 10

Dependent Claim 44 words

8 . A catheter as in claim 7 , wherein the projection comprises an area of greater cross-section than that of the mounting section, the cross section of the projection extending around the catheter approximating the cross-section of the proximal end of the sheath.

Claim 11

Dependent Claim 33 words

9 . A catheter as in claim 8 , wherein the projection extend by means of a sloping surface extending from adjacent the prosthesis mounting section towards an outer surface of the catheter.

Claim 12

Dependent Claim 22 words

10 . A catheter as in claim 5 , further comprising a distal tip, the tip being formed integrally with the sheath.

Claim 13

Dependent Claim 22 words

11 . A catheter as in claim 5 , further comprising a guidewire lumen extending along the longitudinal axis of the catheter.

Claim 14

Dependent Claim 95 words

12 . A kit comprising a catheter for delivering a self expandable prosthesis, the catheter comprising: an elongate body; a distal portion having a section around which the prosthesis can be mounted; and a sheath having a proximal end, and being movable over the prosthesis mounting section in a distal direction from a position substantially covering the prosthesis mounting section to a position substantially uncovering the prosthesis mounting section, such that, in use, movement of the proximal end of the sheath exposes a prosthesis placed in the mounting section; the kit further comprising the prosthesis.

Claim 15

Dependent Claim 95 words

Claim 16

Dependent Claim 16 words

13 . A kit as in claim 12 , wherein the prosthesis is a heart valve.

Claim 17

Dependent Claim 13 words

14 . A kit as in claim 13 , further comprising a guidewire.

Claim 18

Dependent Claim 106 words

15 . A method for delivering a self-expandable heart valve, comprising: approaching an inflow side of a cardiac valve with a valve delivery catheter, wherein the delivery catheter comprising a proximal catheter body, a restraining sheath and a collapsed prosthetic valve having an expandable proximal end and an expandable distal end, wherein the cardiac valve comprises a valve orifice, a valve annulus and a plurality of valve leaflets; positioning the prosthetic valve across the valve orifice; expanding the proximal end of the prosthetic valve against the valve leaflets; and expanding the distal end of the prosthetic valve after expanding the proximal end of the prosthetic valve.

Claim 19

Dependent Claim 106 words

Claim 20

Dependent Claim 31 words

16 . The method for delivering a self-expandable heart valve as in claim 15 , further comprising pushing the restraining sheath distally and exposing the proximal end of the prosthetic valve.

Claim 21

Dependent Claim 30 words

17 . The method for delivering a self-expandable heart valve as in claim 16 , further comprising pushing the catheter body through the prosthetic valve and contacting the restraining sheath.

Claim 22

Dependent Claim 39 words

18 . The method for delivering a self-expandable heart valve as in claim 17 , further comprising pulling the catheter body and the restraining sheath from the prosthetic valve while the catheter body and the restraining sheath remain contacted.

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