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It is an object of the present invention to provide a microfabricated therapeutic actuator. A further object of the invention is to provide a release actuator mechanism using shape memory polymer materials. A further object of the invention is to utilize shape memory polymer microtubing as a release actuator for the delivery of material to a point of use. Another object of the invention is to provide a release actuator mechanism which utilizes shape memory polymer microtubing for use in catheter-based intratubular delivery of material (eg embolic coils) to a point of need. Another object of the invention is to provide microfabri cated therapeutic actuators constructed of shape memory polymer microtubing, wherein the shape memory is deter mined by a desired temperature of the application for the microtubing.

Another object of the invention is to provide a release actuator utilizing a shape memory polymer and which can be …