Wire frame partial flow obstruction for aneurysm treatment

• US 5,980,554 A
• Filed: 05/05/1997
• Issued: 11/09/1999
• Est. Priority Date: 05/05/1997
• Status: Expired due to Fees

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Micro Therapeutics, Inc. (Medtronic Plc)
• Inventors: Lenker, Jay, Crockett, K. David
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): REIP, DAVID OWEN
• Application Number:
  US08/850,311
• Time in Patent Office: 918 Days
• Field of Search: 606/191, 606/195, 606/198, 606/200, 623/1, 623/12
• US Class Current: 606/198
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/12177 comprising additional materials, e.g. thrombogenic, having filaments, having fibers or being coated
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2002/825 having longitudinal struts

Abstract

A wire frame stent or occluding device for use within the vasculature. The device can be stretched into a double wire or single wire configuration for easy deployment into the vasculature.

Claims

1. A method of inserting a wire frame structure into the body, wherein the wire frame structure is adapted for use within a lumen of the body, said wire frame structure comprising a series of wire hoops longitudinally aligned in generally parallel planes and along a generally common axis through the center of each hoop, wherein successive hoops are joined by struts extending from one wire hoop to the next, and wherein the struts are arranged in radially non-aligned arrangement, said method comprising:

providing an insertion catheter with a lumen at its distal end;

deforming the wire frame structure along the common axis so that the hoops are deformed into a substantially straight line configuration;

inserting the wire frame structure in its substantially straight line configuration into the lumen of an insertion catheter;

inserting the insertion catheter into the body to place the wire frame structure at a desired site within the body;

releasing the wire frame structure from the insertion catheter.

2. A method of inserting a wire frame structure into the body, wherein the wire frame structure is adapted for use within a lumen of the body, said wire frame structure comprising a at least two wire hoops longitudinally aligned in generally parallel planes and along a generally common axis through the center of each hoop, wherein the hoops are joined by a strut extending from one wire hoop to the next, said method comprising:

providing an insertion catheter with a lumen at its distal end;

deforming the wire frame structure along the common axis so that the hoops are deformed into a substantially straight line configuration;

inserting the wire frame structure in its substantially straight line configuration into the lumen of an insertion catheter;

inserting the insertion catheter into the body to place the wire frame structure at a desired site within the body;

releasing the wire frame structure from the insertion catheter.

3. A device for obstructing blood flow in an aneurysm affecting a blood vessel having a lumen with an inner wall, said device comprising:

a first hoop circumscribing the inner wall of the blood vessel on one side of the aneurysm;

a second hoop circumscribing the inner wall of the blood vessel on the other side of the aneurysm;

a first strut comprising a substantially straight length of wire extending alone the length of the blood vessel from the first hoop toward the second hoop; and

a second strut comprising a substantially straight length of wire extending along the length of the blood vessel from the second hoop toward the first hoop; and

a flow occluding structure supported by the first and second struts and aligned with the aneurysm so as to at least partially disrupt the flow of blood into the aneurysm.

4. A device according to claim 3, wherein the flow occluding structure protrudes into the aneurysm.

5. A device according to claim 3, wherein the flow occluding structure comprises a coil which protrudes into the aneurysm.

6. A device according to claim 3, wherein the flow occluding structure comprises a length of wire which protrudes into the aneurysm.

7. A device according to claim 3, wherein the flow occluding structure comprises a curved length of wire which conforms to the lumen of the blood vessel and does not protrude into the aneurysm.

8. A device according to claim 3, wherein the flow occluding structure comprises an elastic, superelastic, or shape memory material.

9. A device according to claim 3, wherein:

the device comprises a wire frame structure capable of deformation into a single length of wire; and

the device has an insertion configuration and a deployed configuration, said deployed configuration comprising the first hoop, second hoop, strut and flow occluding structure, said insertion configuration comprising the wire frame structure deformed into a single length of wire, wherein the wire frame structure in said insertion configuration fits within a catheter for delivery into the body of patient, said wire frame structure reverting to the deployed configuration upon release from the catheter.

10. A device according to claim 3, wherein;

the device comprises a wire frame structure capable of deformation into a length of double wire bent at a midpoint of the wire; and

the device has an insertion configuration and a deployed configuration, said deployed configuration comprising the first hoop, second hoop, strut and flow occluding structure, said insertion configuration comprising the wire frame structure deformed into a length of double wire bent at a midpoint of the wire, wherein the wire frame structure in said insertion configuration fits within a catheter for delivery into the body of patient, said wire frame structure reverting to the deployed configuration upon release from the catheter.

11. A system for inserting a device for obstructing blood flow in an aneurysm affecting a blood vessel within the body, said blood vessel having a lumen with an inner wall, said system comprising a flow disrupting device and an insertion device, wherein:

said flow disrupting device having a deployed shape which comprises;

a first hoop circumscribing the inner wall of the blood vessel on one side of the aneurysm;

a second hoop circumscribing the inner wall of the blood vessel on the other side of the aneurysm;

a strut connecting the first and second hoops; and

a flow occluding structure supported by the strut and aligned with the aneurysm so as to at least partially disrupt the flow of blood into the aneurysm;

wherein the flow disrupting device comprises a wire frame structure capable of deformation into straight line configuration; and

said insertion device comprises;

a catheter having a lumen at its distal end, said catheter being sized and dimensioned to allow insertion of the catheter into the body to the site of the aneurysm, said lumen having an internal diameter sufficient to house the flow disrupting device in its straight line configuration;

wherein the flow disrupting device may be deformed into its straight line configuration and inserted into the lumen at the distal end of the catheter for insertion into the body, and the flow disrupting device resiliently reverts to the deployed shape upon release from the lumen at the distal end of the catheter.

12. A method of inserting a wire frame structure into the body, wherein the wire frame structure is adapted for use within a lumen of the body, said wire frame structure comprising a series of wire hoops longitudinally aligned in generally parallel planes and along a generally common axis through the center of each hoop, wherein successive hoops are joined by struts extending from one wire hoop to the next, said struts extending generally perpendicular to the planes of the hoops and generally parallel to said central axis and wherein the struts are arranged in radially non-aligned arrangement, said method comprising:

providing an insertion catheter with a lumen at its distal end;

deforming the wire frame structure along the common axis so that the hoops are deformed into a substantially straight line configuration;

inserting the wire frame structure in its substantially straight line configuration into the lumen of an insertion catheter;

inserting the insertion catheter into the body to place the wire frame structure at a desired site within the body;

releasing the wire frame structure from the insertion catheter.

13. A method of inserting a wire frame structure into the body, wherein the wire frame structure is adapted for use within a lumen of the body, said wire frame structure comprising at least two wire hoops longitudinally aligned in generally parallel planes and along a generally common axis through the center of each hoop, wherein the hoops are joined by a strut extending from one wire hoop to the next, said struts extending generally perpendicular to the planes of the hoops and generally parallel to said central axis, said method comprising:

providing an insertion catheter with a lumen at its distal end;

deforming the wire frame structure along the common axis so that the hoops are deformed into a substantially straight line configuration;

inserting the wire frame structure in its substantially straight line configuration into the lumen of an insertion catheter;

inserting the insertion catheter into the body to place the wire frame structure at a desired site within the body;

releasing the wire frame structure from the insertion catheter.

14. A stent and stent delivery system comprising:

a stent comprising a plurality of hoops, said hoops longitudinally aligned in generally parallel planes and along a generally common axis through the center of each hoop, said hoops connected by struts, said struts extending generally perpendicular to the planes of the hoops and generally parallel to said central axis, said hoops comprised of wires, said hoops characterized by a wire thickness;

an insertion catheter having a lumen with a diameter at least substantially equal to twice the wire thickness of the hoops;

said stent being deformed so that the hoops are elongated into substantially straight line configuration, and the struts and the deformed hoops fall along a generally straight line, said stent being inserted into the lumen of the insertion catheter.

15. A system for inserting a device for obstructing blood flow in a saccular aneurysm affecting a blood vessel within the body, said blood vessel having a lumen with an inner wall, said system comprising a flow disrupting device and an insertion device, wherein:

said flow disrupting device has a deployed shape which comprises;

a first hoop circumscribing the inner wall of the blood vessel on one side of the aneurysm;

a second hoop circumscribing the inner wall of the blood vessel on the other side of the aneurysm;

a strut connecting the first and second hoops; and

a flow occluding structure supported by the strut and aligned with the saccular aneurysm so as to at least partially disrupt the flow of blood into the aneurysm, said flow occluding structure extending outwardly from the blood vessel into the saccular aneurysm;

wherein the flow disrupting device comprises a wire frame structure capable of deformation into straight line configuration; and

said insertion device comprises;

a catheter having a lumen at its distal end, said catheter being sized and dimensioned to allow insertion of the catheter into the body to the site of the aneurysm, said lumen having an internal diameter sufficient to house the flow disrupting device in its straight line configuration;

wherein the flow disrupting device may be deformed into its straight line configuration and inserted into the lumen at the distal end of the catheter for insertion into the body, and the flow disrupting device reverts to the deployed shape upon release from the lumen at the distal end of the catheter.