Coil system

Abstract

Vaso-impacting implants and novel methods of making coils, stent-trievers, flow diverters and the like enable aneurysm treatment, including in the brain. Refined and variegated framing and complex coils provide for rapid electrolytic detachment, including less than 20 second embodiments. Novel enhanced mandrels, fittings and winding schemes are likewise disclosed improving the standard of care and state of the art.

1 . A vasoocclusive implant comprising:
 a metallic wire having a proximal end and a distal end and configured to transition from a constrained, deliverable configuration to a deployed, expanded configuration for the treatment of a vascular abnormality;   wherein, when in the constrained configuration, the metallic wire forms an elongate structure for delivery to a target site; and   wherein, upon delivery of the elongate helical coil structure to the target site, the metallic wire is configured to transition from the constrained configuration to the deployed configuration to form a three-dimensional structure for the treatment of the vascular abnormality.   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . The vasoocclusive implant of  claim 1 , wherein the elongate structure is in the form of an elongate helical coil configured to flex in response to forces applied thereto during delivery of the implant to the target site. 
     
     
         6 . The vasoocclusive implant of  claim 1 , wherein the metallic coil comprises a platinum alloy. 
     
     
         7 . (canceled) 
     
     
         8 . The vasoocclusive implant of  claim 1 , wherein the vascular abnormality is an aneurysm. 
     
     
         9 . A vasoocclusive implant system comprising:
 an elongate pushing member; and   a vasoocclusive implant comprising a metallic wire having a proximal end and a distal end, the implant coupled to the elongate pushing member via a detachable zone at the proximal end of the metallic wire, the metallic wire configured to transition from a constrained, deliverable configuration to a deployed, expanded configuration for the treatment of a vascular abnormality;   wherein, when in the constrained configuration, the metallic wire forms an elongate structure for delivery to a target site; and   wherein, upon delivery of the elongate helical coil structure to the target site a, the metallic wire is configured to transition from the constrained configuration to the deployed configuration to form a three-dimensional structure for the treatment of the vascular abnormality.   
     
     
         10 . The vasoocclusive implant system of  claim 9 , wherein three-dimensional structure comprises a plurality of loops providing a multi-faceted and multi-angular outer surface configured to engage the vascular abnormality. 
     
     
         11 . The vasoocclusive implant system of  claim 10 , wherein the detachable zone is (electrolytically) thermally detachable. 
     
     
         12 . (canceled) 
     
     
         13 . (canceled) 
     
     
         14 . A method for treating an aneurysm, the method comprising:
 providing a vasoocclusive implant system comprising:
 a pusher member having a proximal and a distal end, the pusher member comprising an elongate core wire and a polymeric cover surrounding the core wire, wherein a distal portion of the core wire extends from the distal end of the pusher member; and 
 an implant comprising having an elongate helical coil comprising a metallic wire and having a proximal end and a distal end; an elongate stretch-resistant member extending axially within the helical coil and having a proximal end and a distal end, the proximal end of the stretch-resistant member secured to the proximal end of the helical coil, and the distal end of the stretch-resistant member secured to the distal end of the helical coil; a coupling coil wrapped around the distal end of the core wire, the coupling coil positioned coaxially within the helical coil; and a cylindrical region of insulation material situated between the helical coil and the coupling coil, configured to electrically insulate the helical coil from the core wire; 
 introducing a microcatheter containing the vasoocclusive implant system into a vasculature of a patient; 
 advancing the microcatheter to the aneurysm; 
 pushing the implant out of a distal end of the microcatheter and into the aneurysm until the detachment zone is positioned just outside the microcatheter; and 
 (electrolytically) thermally detaching the implant from the pusher member.