Radiopaque locking frame, filter and flexible end

• US 20030139764A1
• Filed: 01/17/2003
• Published: 07/24/2003
• Est. Priority Date: 04/01/1999
• Status: Active Grant

• Current Assignee: Scion Cardio-Vascular Incorporated
• Original Assignee: Scion Cardio-Vascular Incorporated
• Inventors: Hall, Todd A., Diaz, Raymond, Levinson, Melvin E., Golik, George I.
• Granted Patent: US 7,150,756 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/015 Stop means therefor
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0078 hyperboloidal

Abstract

The radially expandable frame utilized during catheterization includes a guide wire, a radiopaque radially expandable frame with distal and proximal frame ends wherein the guide wire freely passes through the proximal frame end, an elongated actuation sleeve having a flexible distal end piece (coil strain relief) through which freely passes the guide wire, and a friction locking mechanism located at the proximal end of the system which is defined by the proximal ends of the actuation sleeve and guide wire. The expandable frame includes radiopaque frame struts and has a closed, radially compact form and an open, radially expanded form. The actuator flexible end piece is a coil which enables the system to flex in excess of 90 degrees. The actuator sleeve, at its proximal end, includes a friction locking mechanism having locking members with respective locking surfaces.

Claims

1. A filter device for capturing embolic material in a blood vessel comprising:

a guide wire having a proximal end and a distal end;

an expandable frame of frame members having a radiopaque coating and having a closed, radially compact form and an open, radially expanded form and a fore end and an aft end, said aft end coupled to said distal end of said guide wire, said frame of frame members in said radially expanded form forming a pair of facing generally frustoconical frame structures;

a filter material attached to one of said pair of frustoconical frame structures; and

an actuator sleeve adapted to run over said guide wire, said actuator sleeve enabling longitudinal compression of said expandable frame and frame members thereby causing said frame to radially expand and deploy said filter material.

2. A filter device as claimed in claim 1 wherein said radiopaque coating is one of gold or platinum.

3. A filter device for capturing embolic material in a blood vessel comprising:

a guide wire having a proximal end and a distal end;

an expandable frame of frame members having a closed, radially compact form and an open, radially expanded form and a fore end and an aft end, said aft end coupled to said distal end of said guide wire, said frame of frame members in said radially expanded form forming a pair of facing generally frustoconical frame structures;

a filter material attached to one of said pair of frustoconical frame structures; and

an actuator sleeve adapted to run over said guide wire, said actuator sleeve having a flexible distal end coupled to said aft end of said expandable frame, enabling longitudinal compression of said expandable frame and frame members thereby causing said frame to radially expand and deploy said filter material.

4. A filter device as claimed in claim 3 wherein said flexible actuator end piece is a coiled material.

5. A filter device as claimed in claim 4 wherein said flexible actuator end piece permits flexation of the frame relative to the guide wire in excess of 90 degrees.

6. A controllable deployment system for a radially expandable frame utilized during catheterization comprising:

a guide wire having a proximal end and a distal end;

a radially expandable radiopaque frame having a closed, radially compact, elongated form and an open, radially expanded, longitudinally foreshortened form, said radiopaque frame having distal and proximal frame ends;

said guide wire extending through said expandable radiopaque frame;

an elongated actuation sleeve having a distal end, a proximal end, and a lumen through which passes said guide wire, said distal sleeve end coupled to said proximal frame end;

a locking mechanism at a proximal end of said actuable sleeve locking during one of radial expansion or radial closure of said expandable frame.

7. A system as claimed in claim 6 wherein said radiopaque frame is coated with one of gold or platinum.

8. A controllable deployment system for a radially expandable frame utilized during catheterization comprising:

a guide wire having a proximal end and a distal end;

a radially expandable frame having a closed, radially compact, elongated form and an open, radially expanded, longitudinally foreshortened form, said frame having distal and proximal frame ends;

said guide wire extending through said expandable frame;

an elongated actuation sleeve having a distal flexible end, a proximal end, and a lumen through which passes said guide wire, said distal flexible end coupled to said proximal frame end;

a locking mechanism at a proximal end of said actuation sleeve locking during one of radial expansion or radial closure of said expandable frame.

9. A system as claimed in claim 8 wherein said flexible actuation sleeve end piece is a coiled material.

10. A system as claimed in claim 9 wherein said actuation sleeve end piece permits flexation of the frame relative to the guide wire in excess of 90 degrees.

11. A system as claimed in claim 8 wherein said frame is radiopaque a radially inboard locking surface has an interference fit with a radially outboard locking surface.

12. A filter device for capturing embolic material in a blood vessel comprising:

a guide wire having a proximal end and a distal end;

an expandable frame of frame members having a radiopaque coating and having a closed, radially compact form and an open, radially expanded form and a fore end and an aft end, said aft end coupled to said distal end of said guide wire, said frame of frame members in said radially expanded form forming a pair of facing generally frustoconical frame structures;

a filter material attached to one of said pair of frustoconical frame structures; and

an actuator sleeve adapted to run over said guide wire, said actuator sleeve enabling longitudinal compression of said expandable frame and frame members thereby causing said frame to radially expand and deploy said filter material, and said actuator sleeve including a latch for placing said expandable frame in one of a compressed state and a filter deployed state.