US20030199963A1 Expired / Lapsed US ⏱️ 0.0 years remaining

System for implanting a replacement valve

Assignee: Medtronic Inc

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Filing: 2002-04-23

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Granted: —

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Expires: 2022-04-23

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Abstract

Abstract A system for percutaneously inserting a prosthesis containing a biological replacement for a defective valve into an implantation site through a body lumen. The system contains a balloon catheter upon which a collapsable stent containing a venous valvular replacement is mounted. A protective shield is slidably mounted upon the catheter that is movable between a closed position over the balloon and an open position wherein the balloon can be inflated to expand the stent. A central lumen runs through the catheter that is formed of stainless steel. The central lumen provides a one to one torque ratio between the proximal end of the catheter and the distal end to enhance the steerability of the catheter. The vein of the replacement is reduced in thickness between 50% and 90% of its original size thereby considerably reducing the size of the replacement package when the stem is collapsed upon the balloon of the catheter.

Inventors

👤 Allen Tower
👤 Philipp Bonhoeffer
👤 Michael Martin

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-23 04:43

CPC Classifications

A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2427; A61F2/243; A61F2/2433; A61F2/2412; A61F2/2475; A61F2/82; A61F2/86; A61F2/90; A61F2/95; A61F2/958

Claims Analysis

Total Claims: 17

Claim 1

Independent Claim 133 words

1 . A system for percutaneously inserting a biological valve prosthesis in an implantation site that includes an elongated catheter having a proximal end and a distal end, an elongated inflatable balloon mounted at the distal end of said catheter, said balloon being connected to means for inflating and deflating said balloon, a protective shield slidably mounted upon said catheter for movement between a first closed position wherein said balloon is located under the shield and a second open position wherein said shield is moved back clear of said shield to free said balloon for inflation, a center lumen passing through said catheter, said center lumen being fabricated of stainless steel tubing such that the torque ratio between the distal end and the proximal end of the catheter is about one to one.

Claim 2

Dependent Claim 133 words

Claim 3

Dependent Claim 19 words

2 . The system of claim 1 wherein said stainless steel tubing has an inside diameter of about 0.39″.

Claim 4

Dependent Claim 40 words

3 . The system of claim 1 that further includes an elongated sheath slidably mounted upon the catheter, said sheath having a proximal end and a distal end wherein said distal end of said sheath is connected to said shield.

Claim 5

Dependent Claim 63 words

4 . The system of claim 3 wherein the axial length of catheter is greater than the axial length of said sheath such that an extended length of catheter having an axial length that is equal to or slightly greater than that of the shield protrudes rearwardly from the proximal end of the sheath when said shield is in the first closed position.

Claim 6

Dependent Claim 38 words

5 . The system of claim 4 that further includes index markings on the extended length of said catheter indicting the position of the sheath where the shield is in either the open position or the closed position.

Claim 7

Dependent Claim 23 words

6 . The system of claim 1 that further includes a guide wire that slidably contained within the center lumen of said catheter.

Claim 8

Dependent Claim 42 words

7 . The system of claim 1 that further includes a fluid barrier slidably contained upon the proximal end of said sheath that is insertable into an incision into a body lumen through which said catheter is passed into the implantation site.

Claim 9

Dependent Claim 31 words

8 . The system of claim 7 wherein said barrier includes a tubular body section for passing into the incision and a radially extended end flange for contacting the incision entrance.

Claim 10

Dependent Claim 20 words

9 . The system of claim 1 that further includes a biological venous valvular prosthesis mounted upon the catheter balloon.

Claim 11

Dependent Claim 25 words

10 . The system of claim 9 wherein said prosthesis includes an expandable stent and a biological vein containing a valve mounted inside said stent.

Claim 12

Dependent Claim 23 words

11 . The system of claim 10 wherein the vein wall is reduced in thickness between 50% and 90% of its original thickness.

Claim 13

Dependent Claim 87 words

12 . The system of claim 11 wherein said stent contains a plurality of ribbon sections each of which is fabricated from a strand of fine wire with the sections being interconnected to form a tubular member, each wire ribbon section contains a periodic series of substantially sinusoidal shaped bends along the length of said ribbon section wherein each bend contains an apex that is welded to an apex on an adjacent ribbon section, said welds being weaker than the tensile strength of the fine wire strands.

Claim 14

Dependent Claim 21 words

13 . The system of claim 12 wherein the wire is fabricated of an alloy containing 90% platinum and 10% indium.

Claim 15

Dependent Claim 20 words

14 . The system of claim 13 wherein said wire has a tensile strength of between 150,000 and 175,000 psi.

Claim 16

Dependent Claim 35 words

15 . The stent of claim 14 which is cylindrical in form when expanded and said welds are contained within a region bounded by the inside diameter and the outside diameter of the expanded stent.

Claim 17

Dependent Claim 27 words

16 . The system of claim 1 that further includes a contoured nose cone mounted at the distal end of the catheter in front of the balloon.

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