Intravascular device deployment mechanism incorporating mechanical detachment
View Patent ↗The apparatus for deployment of a therapeutic device such as a micro-coil detachably mounts the therapeutic device to a distal portion of a pusher member. In one embodiment, the therapeutic device is detachably mounted to the distal portion of the pusher member by a connector fiber for securing the therapeutic device to the pusher member. The connector fiber passes through a cutter member such as a cutting ring within the distal portion of the pusher member, for cutting the connector fiber to release the therapeutic device when a desired placement of the therapeutic device within the vasculature is achieved.
1. An apparatus for release and deployment of a therapeutic device having a retaining portion within the vasculature of a patient, comprising:
an elongated, flexible tubular pusher member having a distal end, a distal portion, a proximal portion, and an interior lumen extending from said distal portion to said proximal portion of said elongated, flexible tubular pusher member, said distal portion including at least one port proximal to said distal end;
a connector member detachably retaining the therapeutic device to the elongated, flexible tubular pusher member for placement of the therapeutic device within the vasculature, said connector member passing through said lumen to said at least one port;
an elongated proximal member extending along the elongated, flexible tubular pusher member;
a releasing ring disposed adjacent to the connector member, the connector member passing through the releasing ring, the releasing ring being connected to said elongated proximal member, and the releasing ring being configured to break the connector member for releasing the therapeutic device when a longitudinal force is applied on the releasing ring by the elongated proximal member.
2. The apparatus of claim 1 , wherein said connector member is formed from a plastic material.
3. The apparatus of claim 1 , wherein said connector member is formed from polyethylene.
4. The apparatus of claim 1 , wherein said releasing member ring is disposed in the interior lumen.