Balloon catheter with selectable diameter and expandable length

• US 20050075711A1
• Filed: 10/03/2003
• Published: 04/07/2005
• Est. Priority Date: 10/03/2003
• Status: Abandoned Application

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Neary, Anthony J.
• Application Number:
  US10/678,833
• Publication Number:
  US 20050075711A1
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2/9662 the middle portion of the stent or stent-graft is released first

Abstract

One aspect of the invention provides a system for treating a vascular condition, including a catheter body, an inflatable balloon disposed on the catheter body, a plurality of concentrically disposed restrictors circumferentially disposed on the inflatable balloon, and inflation means coupled to a proximal end of the catheter body to inflate the inflatable balloon. One or more restrictors are at least partially removable to allow expansion of the inflatable balloon to a predetermined size. A method of treating a vascular condition and a balloon catheter including a plurality of restrictors is also disclosed.

Claims

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

a catheter body;

an inflatable balloon disposed on the catheter body;

a plurality of concentrically disposed restrictors circumferentially disposed on the inflatable balloon, wherein one or more restrictors are at least partially removable to allow expansion of the inflatable balloon to a predetermined size; and

inflation means to inflate the inflatable balloon, the inflation means coupled to a proximal end of the catheter body.

2. The system of claim 1 wherein the catheter body includes an inflation lumen and an inflation hole adjacent to the inflatable balloon, wherein the inflation lumen and the inflation hole allow inflation fluid from the inflation means to inflate the inflatable balloon.

3. The system of claim 1 wherein the one or more restrictors are partially removable to allow expansion of the inflatable balloon to a predetermined balloon diameter.

4. The system of claim 1 wherein the one or more restrictors are partially removable to control an expandable length of the inflatable balloon.

5. The system of claim 1 wherein the one or more restrictors are frictionally coupled to the inflatable balloon.

6. The system of claim 1 wherein each restrictor is attached to the catheter body at at least one point on an outside surface of the catheter body.

7. The system of claim 1 further comprising:

a restrictor removal element attached to each restrictor.

8. The system of claim 7 wherein the restrictor removal element and the restrictor are formed as a unitary member.

9. The system of claim 7 wherein the restrictor removal element is selected from the group consisting of a tab, a flap, a string, a thread, and a wire.

10. The system of claim 1 wherein the one or more restrictors comprise a material selected from the group consisting of polyurethane, silicone, a copolymer of polyurethane and silicone, natural rubber, synthetic rubber, a thermoplastic polyamide, nylon, latex, polyethylene, polyisoprene, polyisobutylene, polyethylene terephthalate, polyethylene, polytetrafluoroethylene, expanded polytetrafluoroethylene, an elastane, a thermoplastic elastomer, a woven polymeric fabric, an expandable polymeric sheet, an elastomeric material, a semi-compliant polymer, and a combination thereof.

11. The system of claim 1 further comprising:

a stent including a stent framework operably coupled to the inflatable balloon, wherein the one or more restrictors are removable to allow expansion of the stent framework to a predetermined stent diameter.

12. A method of treating a vascular condition, comprising:

providing a variable expansion balloon catheter including a plurality of concentrically disposed restrictors circumferentially disposed on an inflatable balloon;

selecting at least one of the restrictors based on a predetermined balloon size;

axially displacing the selected restrictors with respect to the inflatable balloon; and

inflating the inflatable balloon to the predetermined balloon size based on the axial displacement of the selected restrictors.

13. The method of claim 12 wherein axially displacing the selected restrictors comprises sliding the selected restrictors towards a proximal end of the variable expansion balloon catheter.

14. The method of claim 12 wherein axially displacing the selected restrictors comprises removing the selected restrictors from the variable expansion balloon catheter.

15. The method of claim 12 wherein axially displacing the selected restrictors comprises manually pulling at least one restrictor removal element attached to the selected restrictors.

16. The method of claim 12 wherein inflating the inflatable balloon to the predetermined balloon size comprises allowing expansion of the inflatable balloon to a predetermined balloon diameter when the inflatable balloon is inflated.

17. The method of claim 12 wherein inflating the inflatable balloon to the predetermined balloon size comprises controlling an expandable length of the inflatable balloon.

18. The method of claim 12 further comprising:

expanding a stent including a stent framework, the stent framework operably coupled to the inflatable balloon;

wherein the stent is expanded to a predetermined stent diameter based on the axial displacement of the selected restrictors.

19. A balloon catheter, comprising:

a catheter body;

an inflatable balloon disposed on the catheter body; and

a plurality of concentrically disposed restrictors circumferentially disposed on the inflatable balloon, wherein one or more restrictors are axially translatable to allow expansion of the inflatable balloon to a predetermined size.

20. The balloon catheter of claim 19 wherein the catheter body includes an inflation lumen and an inflation hole adjacent to the inflatable balloon, wherein the inflation lumen and the inflation hole allow inflation of the inflatable balloon when an inflation fluid is injected into the inflation lumen at a proximal end of the balloon catheter.

21. The balloon catheter of claim 19 wherein the one or more restrictors are axially translatable to allow expansion of the inflatable balloon to a predetermined balloon diameter.

22. The balloon catheter of claim 19 wherein the one or more restrictors are axially translatable to control an expandable length of the inflatable balloon.

23. The balloon catheter of claim 19 wherein the one or more restrictors are frictionally coupled to the inflatable balloon.

24. The balloon catheter of claim 19 wherein each restrictor is attached to the catheter body at least one point on an outside surface of the catheter body.

25. The balloon catheter of claim 19 wherein the one or more restrictors comprise a material selected from the group consisting of polyurethane, silicone, a copolymer of polyurethane and silicone, natural rubber, synthetic rubber, a thermoplastic polyamide, nylon, latex, polyethylene, polyisoprene, polyisobutylene, polyethylene terephthalate, polyethylene, polytetrafluoroethylene, expanded polytetrafluoroethylene, an elastane, a thermoplastic elastomer, a woven polymeric fabric, an expandable polymeric sheet, an elastomeric material, a semi-compliant polymer, and a combination thereof.

26. The balloon catheter of claim 19 further comprising:

a restrictor removal element attached to each restrictor.

27. The balloon catheter of claim 26 wherein the restrictor removal element and the restrictor are formed as a unitary member.

28. The balloon catheter of claim 26 wherein the restrictor removal element is selected from the group consisting of a tab, a flap, a string, a thread, and a wire.

29. The balloon catheter of claim 19 further comprising:

a stent including a stent framework operably coupled to the inflatable balloon, wherein the one or more restrictors are removable to allow expansion of the stent framework to a predetermined stent diameter.