Vascular implant

• US 9,744,059 B2
• Filed: 11/14/2014
• Issued: 08/29/2017
• Est. Priority Date: 11/19/2003
• Status: Active Grant

• Current Assignee: Shockwave Medical, Incorporated (Johnson & Johnson)
• Original Assignee: Neovasc Medical Ltd. (Neovasc Incorporated)
• Inventors: Ben-Muvhar, Shmuel
• Primary Examiner(s): BUI, VY Q
• Application Number:
  US14/542,311
• Publication Number:
  US 20150073530A1
• Time in Patent Office: 1,019 Days
• Field of Search: 623 111, 623 113, 623 115, 623 131, 623 112, 623 117, 606108, 606191, 606194, 606195, 606198, 606200
• CPC Class Codes: A61B 17/1227 Spring clips
• CPC Class Codes: A61B 17/1285 for minimally invasive surgery
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/962 having an outer sleeve
• 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 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/826 more than one stent being applied sequentially
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0071 breakable or frangible

Abstract

A medical implant (20) includes first and second ring members (22, 24), each including a resilient framework (26) having a generally cylindrical form. A tubular sleeve (28) is fixed to the first and second ring members so as to hold the ring members in mutual longitudinal alignment, thereby defining a lumen (32) passing through the ring members. A constricting element (30) is fit around the sleeve at a location intermediate the first and second ring members so as to reduce a diameter of the lumen at the location.

Claims

1. A system for delivery of an implant having an implant lumen to a target position in a body passage, the system comprising:

an elongate tubular sheath comprising an elastic material, wherein the tubular sheath is configured to be passed through the body passage while containing the implant in a compressed state inside the sheath, and wherein the sheath has a distal end with an aperture formed therein;

a catheter having a proximal end and a distal end and a lumen that extends between the proximal end and the distal end, wherein the lumen distends at the distal end thereby forming a compressible distended portion, wherein at least a portion of the catheter is disposed within the implant lumen, and the compressible distended portion is configured to slidably open and slidably obstruct the aperture;

an ejector configured to move relative to the catheter and to force the implant in a distal direction thus stretching the elastic material of the tubular sheath so as to expand the aperture of the tubular sheath; and

wherein when the compressible distended portion of the catheter slidably opens the aperture and the aperture expands, the implant is delivered to a target position in a body passage.

2. The system of claim 1, wherein the catheter lumen passes through the compressible distended portion, and wherein the catheter is sized to slidably receive a guidewire.

3. The system of claim 1, wherein the compressible distended portion has a non-compressed diameter that is sized to obstruct the aperture.

4. The system of claim 1, wherein the implant comprises first and second ring members coupled together, each having an expanded configuration and a collapsed configuration, wherein the first and second ring members are discrete and separated from one another by a gap region having a smaller diameter than the first and second ring members, wherein the smaller diameter reduces a flow through the body passage at the target position in the expanded configuration.

5. The system of claim 4, wherein the compressible distended portion is compressible to a diameter that is smaller than a diameter of the gap region in the implant.