Main vessel constraining side-branch access balloon

• US 8,414,611 B2
• Filed: 11/03/2006
• Issued: 04/09/2013
• Est. Priority Date: 11/03/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Chalekian, Aaron
• Primary Examiner(s): Severson, Ryan
• Assistant Examiner(s): EASTWOOD, DAVID C
• Application Number:
  US11/592,365
• Publication Number:
  US 20080109056A1
• Time in Patent Office: 2,349 Days
• Field of Search: 623/1.11, 623/1.35, 606/191, 606/192, 606/194, 606/195, 606/198, 604/96.01, 604/97.01, 604/101.01, 604/101.02, 604/101.05, 604/103.07, 604/103.08, 604/103.11, 604/916
• US Class Current: 606/192
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61M 2025/1045 for treating bifurcations, e.g. balloons in y-configuration, separate balloons or special features of the catheter for treating bifurcations
• CPC Class Codes: A61M 2025/1065 having a balloon which is inversely attached to the shaft at the distal or proximal end
• CPC Class Codes: A61M 2025/1072 having balloons with two or more compartments
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

Abstract

A catheter having a multi-chamber balloon which includes a first chamber having a globular configuration and an adjacent second chamber having a generally cylindrical body portion are sequentially inflatable so when employed to enlarge an opening through a stent deployed at a bifurcation the stent is supported around the circumference of the side-branch opening while the stent wall opening is being enlarged.

Claims

1. A medical device balloon having a proximal end, a distal end, and a longitudinal axis, the balloon comprising:

a first balloon portion at the proximal end of the balloon, the first balloon portion defining a first chamber and having a globular configuration with a maximum perpendicular dimension (D1) taken in a plane perpendicular to the longitudinal axis of the balloon and an axial length (D3) which is not more than about 20% greater than the maximum perpendicular dimension (D1), and an adjacent second balloon portion, the second balloon portion defining a second chamber and having a generally cylindrical body portion which has a diameter (D2) which is less than the first chamber diameter axial length (D3), wherein the first balloon portion is proximal of the second balloon portion, the first balloon portion has a proximal end that defines the proximal end of the balloon, the second balloon portion has a distal end that defines the distal end of the balloon, and the first balloon portion has an inwardly inverted conical portion disposed at the proximal end of the balloon.

2. A medical device balloon as in claim 1 wherein the globular configuration of the first chamber is generally spherical.

3. A medical device balloon as in claim 1 wherein the first and second chambers are separated by an imperforate wall.

4. A medical device balloon as in claim 1 wherein the first and second chambers are separated by a wall having one or more perforations or pressure openable valves.

5. A medical device balloon as in claim 1 having an exterior surface and a junction on the exterior surface where the two chambers meet.

6. A medical device balloon as in claim 5 wherein the junction is a circumferential neck which has a diameter less than the diameter (D2) of the second chamber.

7. A medical device balloon as in claim 5 wherein the junction is a neck portion having a minimum perpendicular dimension taken in a plane perpendicular to the longitudinal axis of the balloon that is less the diameter of the second balloon portion.

8. A catheter having a balloon as in claim 1 mounted on a distal portion thereof.

9. A catheter as in claim 8 further comprising separate inflation lumens for each of the first and second chambers.

10. A catheter as in claim 8 further comprising a guide wire lumen passing through the balloon.

11. A catheter as in claim 8 configured as a fixed wire catheter.

12. A catheter as in claim 8 having a single inflation lumen opening into the balloon first chamber and wherein the first and second chambers of the balloon are separated by a wall having one or more perforations or pressure openable valves therein.

13. A catheter as in claim 8 wherein the globular configuration of the first chamber is generally spherical.

14. A catheter as in claim 8 wherein the globular configuration of the first chamber is generally ellipsoid or ovoid.

15. A catheter having a proximal end and a distal end and a shaft with a balloon mounted on a distal portion thereof, the balloon having a proximal end, a distal end, and a longitudinal axis and comprising:

a first chamber having a proximal end, a distal end, and a globular configuration with a maximum perpendicular dimension (D1) taken in a plane perpendicular to the longitudinal axis of the balloon and an axial length (D3) which is not more than about 20% greater than the maximum perpendicular dimension (D1), and an adjacent second chamber having a proximal end, a distal end, and a generally cylindrical body portion with a diameter (D2) which is less than the first chamber axial length (D3), wherein the first chamber is proximal of the second chamber, the first chamber has a proximal end that defines the proximal end of the balloon, the second chamber has a distal end that defines the distal end of the balloon, and the proximal end of the first chamber has an everted mounting to the catheter shaft.