Vaso-occlusion apparatus having a mechanically expandable detachment joint and a method for using the apparatus

• US 6,475,227 B2
• Filed: 11/02/1998
• Issued: 11/05/2002
• Est. Priority Date: 12/24/1997
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Burke, Thomas H., Chee, Uriel Hiram, Nguyen, Kim, Bourang, Henry
• Primary Examiner(s): Schaetzle, Kennedy
• Assistant Examiner(s): DROESCH, KRISTEN L
• Application Number:
  US09/184,567
• Publication Number:
  US 20020058954A1
• Time in Patent Office: 1,464 Days
• Field of Search: 606/158, 606/151, 606/108, 606/200, 606/191, 606/194, 606/198, 604/98.02, 604/93.01, 604/95.04, 604/96.01, 623/1.11
• 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 17/1214 Coils or wires
• CPC Class Codes: A61B 2017/1205 Introduction devices

Abstract

A flexible engaging delivery device (10) for delivery of a vaso-occlusion flexible engaging structure (24) to a vascular target site via a catheter (50) is disclosed comprising a catheter (50) having a lumen (52) and an introducer (48) disposed within the catheter (52). The introducer (48) comprises an outer sleeve (49), a shaft (12) and a wire (16) that is slidably movable within the shaft (12). A wire tip (22) is permanently connected to the wire (16), wherein the wire tip (22) is adapted to contact a matted portion (20) of the vaso-occlusion flexible engaging structure (24) and is used to deliver said flexible engaging structure from said flexible engaging device (10) to a vaso-occlusion target site.

Claims

1. A coil-delivery device for delivery to a vascular target site via an inner-lumen catheter, an elongate, flexible vaso-occlusion coil having an end-region inner lumen, said device comprising:

an elongate sleeve having proximal and distal ends and an inner lumen extending therebetween,

a wire slidably movable within said sleeve, said wire having a distal end region extending beyond the distal end of the sleeve, and a proximal end region that can be manipulated to move the wire between extended and retracted positions with respect to the sleeve'"'"'s distal end, and

a flexible engaging structure having a proximal end attached to the sleeve'"'"'s distal end and a distal end attached to the wire distal to the sleeve'"'"'s distal end, such that movement of the wire between its extended and retracted positions is effective to move the flexible engaging structure between extended and radially expanded conditions, respectively, in which the engaging structure is adapted to be received within and compressionally engage the lumen end region of the coil, respectively,

wherein said elongate sleeve has an outer diameter at the distal end such that the elongate sleeve abuts an end of the coil when the engaging structure is received within the lumen end region of the coil.

2. The device of claim 1, wherein the flexible engaging structure is a braided sock.

3. A coil-delivery device for delivery to a vascular target site via an inner-lumen catheter, an elongate, flexible vaso-occlusion coil having an end-region inner lumen, said device comprising:

an elongate sleeve having proximal and distal ends and an inner lumen extending therebetween,

a wire slidably movable within said sleeve, said wire having a distal end region extending beyond the distal end of the sleeve, and a proximal end region that can be manipulated to move the wire between extended and retracted positions with respect to the sleeve'"'"'s distal end, and

a flexible engaging structure having a proximal end attached to the sleeve'"'"'s distal end and a distal end attached to the wire distal to the sleeve'"'"'s distal end, such that movement of the wire between its extended and retracted positions is effective to move the flexible engaging structure between extended and radially expanded conditions, respectively, in which the engaging structure is adapted to be received within and compressionally engage the lumen end region of the coil, respectively,

wherein said engaging structure, with such in its extended condition, is adapted to be received in the inner lumen of a coil having an outer diameter as small as 15 mils, and with such in its expanded condition, to compressionally engage the lumen end region of a coil having an outer diameter as great as 35 mils.

4. The device of claim 3, wherein the flexible engaging structure is a braided sock.

5. A coil-delivery assembly for delivery of a plurality of vaso-occlusion coils to a vascular target site, comprising:

(a) a catheter having proximal and distal ends, and an inner lumen extending therebetween,

(b) an introduccer for holding a vaso- occlusion coil in a substantially linear condition, said introducer having an end region adapted to be mated with the proximal end of said catheter, for transferring a coil from the introducer into the catheter, said coils each having an end-region inner lumen, and

(c) a coil-delivery device for delivery of such a coil to a target site via the catheter, said device having (i) an elongate sleeve having proximal and distal ends and an inner lumen extending therebetween, (ii) a wire slidably movable within said sleeve, said wire having a distal end region extending beyond the distal end of the sleeve, and a proximal end region that can be manipulated to move the wire between extended and retracted positions with respect to the sleeve'"'"'s distal end, and (iii) a flexible engaging structure having a proximal end attached to the sleeve'"'"'s distal end and a distal end attached to the wire distal to the sleeve'"'"'s distal end, such that movement of the wire between its extended and retracted positions is effective to move the flexible engaging structure between extended and radially expanded conditions, respectively, in which the engaging structure is adapted to be received within and compressionally engage the lumen end region of the coil, respectively.

whereby the coil may be frictionally and releasably engaged by the flexible engaging structure, with the coil held in the introducer, transferred from the introducer into and through the catheter, and released from the flexible engaging structure after being advanced across the catheter'"'"'s distal end.

6. The assembly of claim 5, wherein the engaging structure is a braided sock.

7. The assembly of claim 5, wherein said engaging structure, with such in its extended condition, is adapted to be received in the inner lumen of a coil having an outer diameter as small as 15 mils, and with such in its expanded condition, to compressionally engage the lumen end region of a coil having an outer diameter as great as 35 mils.

8. The assembly of claim 7, wherein the flexible engaging structure is a braided sock.

9. A method for releasably engaging a vaso-occlusion coil of the type having an end-region inner lumen, comprising of:

immobilizing the coil in a substantially linear condition in a tube having an open access end,

inserting into said tube, a coil-delivery device having (i) an elongate sleeve having proximal and distal ends and an inner lumen extending therebetween, (ii) a wire slidably movable within said sleeve, said wire having a distal end region extending beyond the distal end of the sleeve, and a proximal end region that can be manipulated to move the wire between extended and retracted positions with respect to the sleeve'"'"'s distal end, and (iii) a flexible engaging structure having a proximal end attached to the sleeve'"'"'s distal end and a distal end attached to the wire distal to the sleeve'"'"'s distal end, such that movement of the wire between its extended and retracted positions is effective to,move the flexible engaging structure between extended and radially expanded conditions, respectively, in which the engaging structure is adapted to be received within and compressionally engage the lumen end region of the coil, respectively, and

moving the wire to its retracted position to compressionally engage the engaging member with the inner lumen of the coil.

10. The method of claim 9, for use in engaging a vaso-occlusion wire having an outer diameter between 15 and 35 mils, wherein said engaging structure, with such in its extended condition, is adapted to be received in the inner lumen of a coil having an outer diameter as small as 15 mils, and with such in its expanded condition, to compressionally engage the lumen end region of a coil having an outer diameter as great as 35 mils.