US 11,937,825 B2
Hook wire for preventing premature embolic implant detachment
Daniel Solaun, Miami, FL (US); and David Blumenstyk, Miami, FL (US)
Assigned to DEPUY SYNTHES PRODUCTS, INC., Raynham, MA (US)
Filed by DePuy Synthes Products, Inc., Raynham, MA (US)
Filed on Mar. 2, 2022, as Appl. No. 17/685,147.
Prior Publication US 2023/0277185 A1, Sep. 7, 2023
Int. Cl. A61B 17/12 (2006.01)
CPC A61B 17/12113 (2013.01) [A61B 17/12145 (2013.01); A61B 2017/12054 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A detachment system for delivering an implantable medical device to a target location of a body vessel, the detachment system comprising:
a tubular body and a distal tube disposed on the end of the tubular body, wherein a lumen extends through the tubular body and the distal tube;
a loop wire comprising a first end affixed to the tubular body and comprising a loop opening positioned approximate a distal end of the distal tube;
a pull wire extending through the lumen;
a hook wire extending radially through a sidewall of the distal tube and into the lumen, the hook wire positioned around a pull wire portion of the pull wire and tensioned such that the pull wire portion abuts the distal tube, thereby providing frictional resistance between the pull wire portion and the sidewall of the distal tube;
wherein the loop wire and the pull wire are positioned to secure the implantable medical device to the detachment system, and
wherein the frictional resistance provided by the pull wire portion against the tubular body is effective to inhibit premature detachment of the implantable medical device as the implantable medical device is delivered by the detachment system to the target location of the body vessel.
 
13. A method comprising:
providing a tubular body and a distal tube disposed on the end of the tubular body, wherein a lumen extends through the tubular body and the distal tube;
affixing a loop wire to the distal tube;
positioning a loop opening in the loop wire approximate a distal end of the distal tube while the loop wire is affixed to the distal tube such that the loop wire is extended through the lumen;
extending a pull wire through the lumen;
extending the loop opening through a locking portion of an implantable medical device;
extending a distal end of the pull wire through the loop opening;
extending a hook wire radially through a sidewall of the distal tube and into the lumen;
positioning the hook wire around a pull wire portion of the pull wire;
tensioning the hook wire such that the pull wire portion abuts the sidewall, thereby providing frictional resistance against the distal tube; and
preventing, through the frictional resistance of the pull wire portion against the distal tube, release of the implantable medical device while the implantable medical device is delivered through vasculature to a treatment site.