US 9,808,256 B2
Electrolytic detachment elements for implant delivery systems
Jianlu Ma, Irvine, CA (US); and Vincent Divino, Mission Viejo, CA (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by COVIDIEN LP, Mansfield, MA (US)
Filed on Aug. 8, 2014, as Appl. No. 14/454,880.
Prior Publication US 2016/0038152 A1, Feb. 11, 2016
Int. Cl. A61B 17/12 (2006.01); A61B 17/00 (2006.01); A61B 90/00 (2016.01)
CPC A61B 17/12172 (2013.01) [A61B 17/12113 (2013.01); A61B 2017/00526 (2013.01); A61B 2017/12063 (2013.01); A61B 2090/3966 (2016.02)] 15 Claims
OG exemplary drawing
 
1. A delivery system, comprising:
an electrolytically corrodible core wire comprising a proximal portion, a distal portion, and a detachment zone between the proximal portion and the distal portion;
a proximal insulating layer annularly contacting the proximal portion;
a coil helically winding about and contacting at least a portion of the proximal insulating layer;
a tube annularly contacting at least a portion of the helical coil;
a distal insulating layer annularly contacting the distal portion; and
a hub of an implant annularly contacting at least a portion of the distal insulating layer,
wherein the proximal portion and the distal portion each have a microstructure with a crystallinity that is greater than a crystallinity of a microstructure of the detachment zone.