Method and system for stent retention using an adhesive

• US 6,958,073 B2
• Filed: 04/13/2004
• Issued: 10/25/2005
• Est. Priority Date: 04/21/2003
• Status: Expired due to Term

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Patel, Kaushik A., Rogers, Ronan, Deshmukh, Susheel R.
• Primary Examiner(s): Dawson, Glenn K.
• Assistant Examiner(s): Mendoza, Michael G.
• Application Number:
  US10/823,216
• Publication Number:
  US 20040210299A1
• Time in Patent Office: 560 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.19, 623/1.21, 606/108, 606191-198
• US Class Current: 606/194
• 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

Abstract

The invention provides a method of manufacturing a system for treating a vascular condition. A catheter including an inflatable balloon is provided. A stent is positioned over the balloon. An adhesive material is applied between an inner surface of the stent and an outer surface of the balloon. The adhesive material is heated to above a melting point of the adhesive material. The adhesive material is cooled to below a melting point of the adhesive material to provide an adhesive bond that retains the stent to the catheter during vascular delivery, wherein the stent is released from the balloon following inflation and deflation of the balloon at a treatment site.

Claims

1. A method of manufacturing a system for treating a vascular condition, comprising:

providing a catheter, the catheter including an inflatable balloon;

positioning a stent over the balloon;

positioning a sheath over the stent;

crimping the stent onto the balloon prior to introducing an adhesive material within the sheath;

dispersing an adhesive material throughout a fluid prior to application of the adhesive material wherein approximately three grams (3 g) of adhesive material is dispersed throughout approximately twenty cubic centimeters (20 cc) of fluid;

applying an adhesive material between an inner surface of the stent and an outer surface of the balloon;

heating the adhesive material to above a melting point of the adhesive material;

cooling the adhesive material to below a melting point of the adhesive material to provide an adhesive bond that retains the stent to the catheter during vascular delivery, wherein the stent is released from the balloon following inflation and deflation of the balloon at a treatment site; and

removing the sheath after cooling the adhesive material.

2. A method of manufacturing a system for treating a vascular condition, comprising:

providing a catheter, the catheter including an inflatable balloon;

positioning a stent over the balloon;

positioning a sheath over the stent;

crimping the stent onto the balloon prior to introducing an adhesive material within the sheath;

dispersing an adhesive material throughout a fluid prior to application of the adhesive material;

heating the adhesive material and fluid to dissolve the adhesive material in the fluid;

applying an adhesive material between an inner surface of the stent and an outer surface of the balloon;

heating the adhesive material to above a melting point of the adhesive material;

cooling the adhesive material to below a melting point of the adhesive material to provide an adhesive bond that retains the stent to the catheter during vascular delivery, wherein the stent is released from the balloon following inflation and deflation of the balloon at a treatment site; and

removing the sheath after cooling the adhesive material.

3. The method of claim 2 wherein heating the adhesive material and fluid to dissolve the adhesive material in the fluid comprises heating the adhesive material to a temperature in the range of ninety-five degrees Fahrenheit (95°

F.) to one hundred five degrees Fahrenheit (105°

F.) for a time duration of approximately ninety (90) minutes.

4. A method of manufacturing a system for treating a vascular condition, comprising:

providing a catheter, the catheter including an inflatable balloon;

positioning a stent over the balloon;

positioning a sheath over the stent;

crimping the stent onto the balloon prior to introducing an adhesive material within the sheath;

dispersing the adhesive material throughout a fluid prior to introduction of the adhesive material;

introducing the adhesive material between an inner surface of the stent and an outer surface of the balloon wherein introducing the adhesive material comprises;

loading the adhesive material into a syringe having a fine needle;

inserting the needle within the sheath; and

injecting the adhesive material through the needle within the sheath such that the adhesive material coats at least a portion of the outer surface of the balloon;

heating the adhesive material to above a melting point of the adhesive material;

cooling the adhesive material to below a melting point of the adhesive material to provide an adhesive bond that retains the stent to the catheter during vascular delivery, wherein the stent is released from the balloon following inflation and deflation of the balloon at a treatment site; and

removing the sheath after cooling the adhesive material.