Medical implant having a curlable matrix structure and method of use

• US 10,342,683 B2
• Filed: 12/20/2013
• Issued: 07/09/2019
• Est. Priority Date: 07/19/2002
• Status: Active Grant

• Current Assignee: USSC Medical GmbH (Medtronic Plc)
• Original Assignee: USSC Medical GmbH (Medtronic Plc)
• Inventors: Henkes, Hans, Flesser, Achim, Kontek, Ronald, Speder, Jurgen, Bodenburg, Ralph
• Primary Examiner(s): Watkins, Marcia L
• Application Number:
  US14/136,281
• Publication Number:
  US 20140371839A1
• Time in Patent Office: 2,027 Days
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/12063 electrolytically detachable
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

A medical implant, having a proximal and a distal end, that is preformed to assume a superimposed structure at an implantation site but can be made to take on a volume-reduced form making it possible to introduce it by means of a micro-catheter and a guide wire arranged at the proximal end, with the implant in its superimposed structure assuming the form of a longltudlnally open tube and having a mesh structure of intercormected strings or filaments. The implant has a tapering structure at its proximal end where the strings or filaments converge at a connection point.

Claims

1. A medical device consisting of:

a) a guide wire;

b) a longitudinally open laser-cut structure consisting of;

a first portion consisting of a laser-cut mesh of individual filaments defining a first plurality of cells, and having a distal end and a proximal end, the first portion forming a self-expandable longitudinal tube, the distal end of the first portion being open, the first portion extending completely around a circumference of the longitudinal tube, the first plurality of cells having a pattern that repeats around the entire circumference, each distal most pair of individual filaments converging at the distal end towards a distal tail, each distal tails comprising a projection that extends distally from a point at which the pair of individual filaments meet; and

a second portion consisting of a laser-cut mesh of individual filaments defining a second plurality of cells, and having a distal end and a proximal end, the second portion located proximal to the first portion, and the distal end of the second portion attached to the proximal end of the first portion,

wherein the cells of the first portion are smaller than the cells of the second portion;

c) a single connection between the guide wire and the longitudinally open structure at a circumferential location of the longitudinally open structure at the proximal end of the second portion; and

d) markers attached to the longitudinally open structure, at least some of the markers attached to the distal tails;

wherein the proximal end of the second portion is open and tapers toward the connection, and the guide wire extends proximally of the proximal end of the second portion and is configured to introduce the first and second portions through a microcatheter.

2. The medical device of claim 1, wherein the longitudinal tube is self-expandable due to shape memory of the first portion.

3. The medical device of claim 1, wherein the cells of the first portion are smaller, in a latitudinal direction of the medical device, than the cells of the second portion.

4. The medical device of claim 1, wherein at least one of the first or second portions comprises Nitinol.

5. The medical device of claim 1, wherein the device is retractable proximally by the guide wire into a catheter to collapse the self-expandable longitudinal tube.

6. The medical device of claim 1, wherein the guide wire is detachably coupled to the second portion.

7. The medical device of claim 6, wherein the connection comprises an electrolytically corrodible element.

8. The medical device of claim 1, wherein the guide wire comprises a spiral.

9. The medical device of claim 1, wherein the connection comprises a spiral.

10. The medical device of claim 1, wherein the connection is X-ray reflecting.

11. The medical device of claim 1, wherein three of the markers are arranged at the distal tails.

12. The medical device of claim 1, wherein the markers comprise platinum elements.

13. The medical device of claim 1, wherein the markers comprise platinum-iridium elements.

14. The medical device of claim 1, wherein the first portion has a first lateral edge extending from the proximal end to the distal end of the first portion, and a second lateral edge opposite the first lateral edge extending from the proximal to the distal end of the first portion, wherein the first and second lateral edges are overlapped in a coiled configuration when the medical device is in a volume-reduced form.

15. The medical device of claim 1, wherein the longitudinally open laser-cut structure is curled such that a seam extends along a longitudinal axis of the longitudinally open laser-cut structure, wherein the longitudinally open laser-cut structure has overlapping edges in a volume-reduced form.