Catheter with stent and method for the production of a catheter with stent

• US 7,115,140 B2
• Filed: 02/27/2003
• Issued: 10/03/2006
• Est. Priority Date: 06/06/1994
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Meadox Medicals, Inc. (Boston Scientific Corporation)
• Inventors: Stoltze, Jacob, Kamstrup-Larsen, Jorgen
• Primary Examiner(s): Dawson, Glenn K.
• Assistant Examiner(s): Erezo, Darwin P
• Application Number:
  US10/375,780
• Publication Number:
  US 20030163140A1
• Time in Patent Office: 1,314 Days
• Field of Search: None
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• 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: A61M 25/104 used for angioplasty

Abstract

A catheter system for the introduction and implantation of a stent comprises a catheter (1) with an expandable portion (2) at its one end, elements at the opposite catheter end intended for communication with means for expanding the expandable portion, and a stent (3) made of a material to which a permanent deformation is imparted when the catheter is expanded until the desired insertion diameter is reached, said stent (3) being arranged around the expandable portion (2) of the catheter, where the stent (3) is adhesively connected to the expandable portion (2) of the catheter with adhesion forces between stent and support which are less powerful than the shear forces with which the expandable portion (2) of the catheter influences the adhesive connection when said portion is expanded, all of the above being obtainable by a method whereby the stent (3) is arranged around the expandable portion (2) of the catheter, the catheter surface is softened, e.g. by heating, whereupon the stent (3) is depressed into the catheter surface.

Claims

1. A method for producing a catheter system for introducing and implanting a stent, said method comprising the steps of:

(i) positioning an expandable, permanently deformable, tubular shaped stent around an inflatable portion of a catheter member; and

(ii) forming an adhesive bond at at least a point of contact between said stent and said inflatable portion, said bond having an elastic modulus which is sufficiently lower than the elastic modulus of the stent and sufficiently similar to the elastic modulus of said inflatable portion such that upon expansion of said inflatable portion said bond will be released from said stent but not from said inflatable portion.

2. The method of claim 1 further including the step of:

pressurizing said inflatable portion.

3. The method of claim 1 wherein said forming step further includes:

applying an adhesive to said inflation portion at said point of contact with said stent.

4. The method of claim 1 wherein said applying step further includes:

providing an adhesive having a modulus of elasticity which is substantially similar to the modulus of elasticity of said inflation portion.

5. A catheter system comprising:

a catheter having an inflatable portion;

an expandable stent bonded to said inflatable portion by an adhesive bond that is capable of remaining with the inflatable portion of the catheter upon deployment of the stent upon inflation of the inflatable portion of the catheter;

wherein said adhesive has a modulus of elasticity which is sufficiently similar to the modulus of elasticity of said inflatable portion such that upon expansion of said inflatable portion said bond does not separate from said inflatable portion and sufficiently less than the modulus of elasticity of said stent member such that bond will separate from the stent member upon inflation.