PUSHER ARM AND BALL RELEASE MECHANISM FOR EMBOLIC COILS

摘要

This disclosure concerns release mechanisms for medical implants, particularly embolic coils and the like, which utilize bulbous elements and receiving elements to constrain the bulbous elements. In some cases, the receiving elements are sized and shaped to help constrain the bulbous element axially and/or radially, and may work in concert with constraining elements and/or release wires that are optionally moveable independently of the receiving elements.

主权项

1. A system for treating a patient, comprising:
a catheter defining a lumen: a pusher assembly slidably disposed within the lumen; a constraining element slidably disposed within the lumen and moveable independently of the pusher assembly, the constraining element having a tubular distal end disposable about a distal portion of the pusher assembly; and an embolic coil with a proximal end comprising a bulbous element, wherein the pusher assembly includes a distal receiving element having a first portion defining a first planar surface extending radially and a second portion defining an elongated planar surface extending substantially perpendicular to and distally from the round planar surface, the elongated planar surface having a protrusion extending away from the planar surface.