Catheter device

• US 9,615,950 B2
• Filed: 04/14/2014
• Issued: 04/11/2017
• Est. Priority Date: 06/16/2005
• Status: Active Grant

• Current Assignee: Angiomed GmbH and Co Medizentechnik KG (Becton, Dickinson & Co)
• Original Assignee: Angiomed GmbH and Co Medizentechnik KG (Becton, Dickinson & Co)
• Inventors: Dorn, Jurgen, Wuebbeling, Martin
• Primary Examiner(s): Sevilla, Christian
• Assistant Examiner(s): Mathew, Seema
• Application Number:
  US14/252,667
• Publication Number:
  US 20140228928A1
• Time in Patent Office: 1,093 Days
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• 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 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2250/0032 differing in radiographic density
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: A61M 25/0147 with movable mechanical means, e.g. pull wires
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture
• CPC Class Codes: Y10T 29/49828 Progressively advancing of work assembly station or assembled portion of work

Abstract

A catheter device having a shaft that extends from a proximal end to a distal end to carry on its distal end a self-expanding implant for intraluminal advance on a guidewire and delivery of the implant to an implant site by proximal withdrawal of a sheath that lies radially outside the implant in the catheter, the catheter including a first shaft element to pull the sheath proximally and a second shaft element to push the implant distally to prevent the implant moving proximally with the sheath when the sheath is pulled proximally, wherein the second shaft element carries a stopper for abutting the implant, the stopper including proximal and distal portions having different radiopacities.

Claims

1. A catheter, comprising:

a shaft with proximal and distal ends, a first shaft element, and a second shaft element;

a self-expanding metal implant mounted on the distal end of the shaft; and

a sheath that lies radially outside the implant and radially inside the catheter;

wherein the second shaft element comprises a stopper having;

a stopper proximal portion having a radiopacity different from the radiopacity of the implant; and

a stopper distal portion with an annulus abutting the proximal end of the implant and having a radiopacity different from the stopper proximal portion and different from the radiopacity of the implant;

wherein the implant is adapted for guidewire delivery to an intraluminal implant site and is adapted for site placement by proximal withdrawal of the sheath; and

wherein the first shaft element is adapted to pull the sheath proximally and the second shaft element is adapted to push the implant distally.

2. The catheter of claim 1, wherein the stopper distal portion and the stopper proximal portion engage one another.

3. The catheter of claim 2, wherein the stopper distal portion and the stopper proximal portion each comprise a recessed portion that engage one another by an interference fit.

4. The catheter of claim 3, wherein the stopper distal portion comprises a polymer.

5. The catheter of claim 4, wherein the stopper proximal portion comprises stainless steel and the stopper distal polymer portion is partly molded over the stopper proximal portion'"'"'s stainless steel portion.

6. The catheter of claim 4, wherein the second shaft element comprises a pusher-guider tube and a pusher tube, and wherein a stainless steel portion of the stopper is welded to the pusher-guider tube.

7. The catheter of claim 4, wherein the second shaft element comprises a pusher-guider tube and a pusher tube, and wherein a stainless steel portion of the stopper is glued to the pusher-guider tube.

8. The catheter of claim 3, wherein the stopper distal portion comprises a polymer.

9. The catheter of claim 8, wherein the proximal portion of the stopper is made of stainless steel.

10. The catheter of claim 1, wherein second shaft element comprises a pusher-guider tube and a pusher tube.

11. The catheter of claim 10, wherein the pusher tube has a distal end to which is fixed, side-by-side, the proximal end of the pusher-guider tube that defines a lumen for a guidewire.

12. The catheter of claim 10, wherein the pusher-guider tube extends distal of the stopper to the distal tip of the catheter.

13. The catheter of claim 1, wherein the implant is a self-expanding stent.

14. The catheter of claim 1, wherein the stopper distal portion has a distal abutment surface that defines the proximal end of an annular cavity that carries the implant.

15. The catheter of claim 14, wherein the catheter capable of carrying a range of implants of different lengths, such capability being provided by exchanging the stopper distal portion with another stopper distal portion having a different length, the sum of the length of the stopper distal portion and the length of the implant remaining substantially unchanged.