Method of stenting with minimal diameter guided delivery systems

• US 20070225789A1
• Filed: 03/22/2006
• Published: 09/27/2007
• Est. Priority Date: 03/22/2006
• Status: Active Grant

• Current Assignee: Biosensors International Group, Ltd.
• Original Assignee: Biosensors International Group, Ltd.
• Inventors: Nikolchev, Julian, Becking, Frank P., George, William R., Tran, Victoria, Kavanagh, Joseph T.
• Granted Patent: US 7,699,884 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• 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 2/958 Inflatable balloons for placing stents or stent-grafts
• 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 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0014 having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
• CPC Class Codes: A61F 2310/0097 Coating or prosthesis-covering structure made of pharmaceutical products, e.g. antibiotics

Abstract

Medical devices and methods for delivery or implantation of prostheses within hollow body organs and vessels or other luminal anatomy are disclosed. The subject technologies may be used in the treatment of atherosclerosis in stenting procedures or be used in a variety of other procedures.

Claims

1. A method for stenting a body passageway, the method comprising:

locating a distal end of a guidewire at a site within the body passageway;

feeding a delivery catheter over the guidewire, wherein a catheter body includes a lumen and a superelastic stent slidably compressed in the lumen, and a means to maintain at least a far end of the stent in an open configuration; and

deploying the stent by withdrawing the catheter body while the stent position is maintained by a blocker.

2. The method of claim 1, wherein the site is within a coronary artery selected from the group of small diagonals, PDA, and OM vessels.

3. The method of claim 2, wherein a diameter at the site is between about 2 mm and about 3 mm.

4. The method of claim 1, wherein the guidewire is a 0.014 inch guidewire

5. The method of claim 1, wherein the delivery catheter includes an angioplasty balloon and an inflation lumen, the method further comprising dilatating the balloon.

6. The method of claim 1, wherein the means comprises abutting ends of the stent.

7. The method of claim 1, wherein the means comprises a mandrel extending through at least a portion of the stent and the method further comprises pushing the mandrel from the delivery catheter lumen by feeding the delivery catheter over the guidewire.

8. The method of claim 7, wherein the mandrel extends through the length of the catheter body.

9. The method of claim 7, wherein the mandrel is a guidewire.

10. The method of claim 9, wherein the delivery system is about 190 cm long and the guidewire is longer.

11. The method of claim 10, wherein the guidewire is an exchange-length guidewire.

12. The method of claim 11, wherein a proximal side of the guidewire is adapted to dock with an extension wire.

13. The method of claim 9, wherein the mandrel comprises an extension wire including a distal end adapted to dock with the guidewire.

14. The method of claim 1, wherein a distal end of the blocker is adapted to hold open a proximal end of the stent.

15. The method of claim 1, wherein the blocker comprises an end of a tubular slider, and the method further comprise stabilizing the slider at a proximal end with a pusher when withdrawing the delivery catheter body.

16. The method of claim 1, wherein the blocker comprises an end of an elongate member actuatable from a proximal end of the delivery catheter.

17. The method of claim 16, wherein the elongate member is tubular and the guidewire remains in the delivery guide lumen during stent delivery.

18. The method of claim 16, wherein the elongate member is solid and the method further comprises exchanging the guidewire for the elongate member.

19. The method of claim 1, wherein the delivery catheter is fed in an over-the-wire fashion.

20. The method of claim 1, wherein the delivery catheter is fed in a rapid-exchange fashion.

21. The method of claim 1, wherein the guidewire is an 0.014 inch size guidewire.

22. The method of claim 1, wherein the guidewire is an 0.010 inch size guidewire.