Stent and catheter assembly and method for treating bifurcations

• US 7,955,379 B2
• Filed: 08/07/2007
• Issued: 06/07/2011
• Est. Priority Date: 08/13/1997
• Status: Expired due to Fees

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories)
• Inventors: Wilson, W. Stan, Mauch, Kevin M.
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US11/835,146
• Publication Number:
  US 20080015681A1
• Time in Patent Office: 1,400 Days
• Field of Search: 623/1.11, 623/1.13, 623/1.35, 623/1.36, 623/1.2, 606191-198, 128/898
• US Class Current: 623/1.35
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• 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 2/954 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 2002/061 provided with means for allowing access to secondary lumens
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• 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 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/006 modular
• 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 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00

Abstract

An apparatus and method is provided for stenting bifurcated vessels. A proximal angled stent is configured for implanting in a side-branch vessel wherein the proximal angled stent has an angulated portion that corresponds to the angle formed by the intersection of the side-branch vessel and the main vessel so that all portions of the side-branch vessel at the bifurcation are covered by the proximal angled stent. A main-vessel stent is provided for implanting in the main vessel, wherein the main-vessel stent has an aperture or stent cell that aligns with the opening to the side-branch vessel to permit unobstructed blood flow between the main vessel and the side-branch vessel. Side-branch and main-vessel catheter assemblies are advanced over a pair of guide wires for delivering, appropriately orienting, and implanting the proximal angled stent and the apertured stent.

Claims

1. A method for stenting a bifurcation, comprising:

providing a stent delivery assembly wherein a Y-shaped stent is mounted about an expandable branched distal end of a catheter having a first branch and a second branch, a first guide wire extending through said first branch and engaging said second branch so as to maintain said branches in a converging configuration and a guide wire lumen extending through said second branch;

advancing a second guide wire through vasculature so that its distal end is positioned distal to said bifurcation;

backloading a proximal end of said second guide wire into the distal end of said second branch;

advancing said catheter over said second guide wire distal to said bifurcation;

retracting said first guide wire from engagement with said second branch;

positioning said Y-shaped stent in said bifurcation; and

expanding said branched distal end of said catheter.

2. The method of claim 1, wherein said two branches are expanded successively.

3. The method of claim 1, further comprising rotating said catheter so as to align said first guide wire with said bifurcation.

4. The method of claim 1, further comprising deflating said catheter after expansion and withdrawing said catheter while leaving said guide wires in place for further intervention.

5. The method of claim 4, wherein said further intervention comprises additional expansion of said stent.

6. The method of claim 1, wherein said branches of said catheter are biased so as to diverge upon disengagement of said first guide wire from said second branch and positioning Y-shaped stent comprises withdrawing said catheter proximal to said bifurcation.

7. The method of claim 6, further comprising advancing said first guide wire distal to said bifurcation.

8. The method of claim 7, wherein said bifurcation includes a main vessel and a side-branch vessel and wherein said first guide wire is extended into said side-branch vessel and said second guide wire is extended into said main vessel.

9. The method of claim 1, wherein both of said branches are expanded simultaneously.