System and device for minimizing embolic risk during an interventional procedure

• US 6,592,616 B1
• Filed: 04/28/2000
• Issued: 07/15/2003
• Est. Priority Date: 04/28/2000
• Status: Active Grant

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Patel, Udayan G., Stack, Richard S., Muller, Paul F.
• Primary Examiner(s): Milano, Michael J.
• Assistant Examiner(s): HO, TAN-UYEN THI
• Application Number:
  US09/560,209
• Time in Patent Office: 1,173 Days
• Field of Search: 623/1.15, 623/1.11, 623/1--, 600/200, 600/108, 600/194, 604/508, 604/509, 604/510, 604/96.01, 604/103.05
• US Class Current: 623/1.17
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• 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 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/825 having longitudinal struts
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal

Abstract

A device for trapping plaque against the vascular wall includes a tubular-shaped net which is made from a blood-permeable and biocompatable material having expandable members attached to each end of the tubular net. The expandable members are placed in their expanded position within a blood vessel to maintain the tubular net against the area of plaque to be treated with an interventional procedure. A balloon angioplasty procedure or stenting procedure is subsequently performed within the inner lumen formed in the tubular net. The tubular net prevents any emboli which may be created during the interventional procedure from entering into the bloodstream.

Claims

1. A system for treating an area of plaque in a blood vessel and minimizing the possibility of emboli from the plaque entering the bloodstream, comprising:

a plaque-trapping device including a permanently implantable tubular net having proximal and distal ends and an inner lumen formed therein, said tubular net being made from a flexible, blood permeable and biocompatible material with an expandable member attached to each of said proximal and distal ends of said tubular net which is capable of expanding from a collapsed to an expanded condition to contact the wall of the blood vessel to maintain the tubular net over the area of plaque;

an implantable stent expandable from a contracted to an expanded condition and adapted for placement within the inner lumen of said tubular net for compressing the plaque when deployed into the expanded condition; and

a delivery catheter having an inner member with a first region for mountingsaid implantable stent when in the contracted condition and a second region for mounting said plaque-trapping device when in the collapsed condition, along with a retractable restraining sheath overlying said inner member adapted for axial movement with respect to said inner member for deploying said plaque-trapping device and stent in the blood vessel.

2. The system of claim 1, wherein said expandable members of said plaque-trapping device are made from self-expanding material.

3. The system of claim 2, wherein said implantable stent is made from a self-expanding material.

4. The system of claim 3, wherein said first and second mounting regions of said delivery catheter have a substantially cylindrical shape and the diameter of said second mounting region is smaller then the diameter of said first mounting region.

5. The system of claim 4, wherein said plaque-trapping device has a longitudinal length and said implantable stent has a longitudinal length with the longitudinal length of said plaque-trapping device being less than the longitudinal length of said implantable stent.

6. The system of claim 5, wherein said plaque-trapping device includes a plurality of struts attached to each of said expandable members to maintain a set longitudinal length between each of said expandable members.