Embolic coil detachment mechanism with heating element and kicker

摘要

Provided herein are a system, method, and apparatus for delivering a therapeutic device, e.g. an embolic coil, from a delivery tube at a target site in a patient's body. A heating element is disposed in the delivery tube that can be actuated remotely, and a layer of low temperature adhesive is applied at the heating element to retain the therapeutic device. The kicker in the form of, for example, a compressed spring is mounted within the delivery tube so as to be in contact with the therapeutic device for applying a constant ejector force that is countered by the adhesive force of the low temperature adhesive. When the heating element is actuated, the spring's ejector force overcomes the softened adhesive's adhesive force to force the therapeutic device out of the delivery tube.

主权项

1. A system for delivering a therapeutic device within a patient's vascular system comprising:
a therapeutic device having a working component and a longitudinal extension depending therefrom; a flexible tubing defining a lumen, the flexible tubing having a proximal end and a distal end; a heating element disposed at the distal end of the flexible tubing, the heating element actuatable remotely therefrom, and wherein the heating element is adhered to the longitudinal extension of the therapeutic device by an adhesive; and a compressed spring fixed to an inner wall of the flexible tubing and disposed within the flexible tubing and proximal to the therapeutic device, the compressed spring being biased to apply a longitudinal force to push said longitudinal extension and the therapeutic device out of the flexible tubing, and said adhesive being configured to restrain said compressed spring from pushing said longitudinal extension and the therapeutic device out of the flexible tubing until said adhesive is heated by said heating element.