Rotational controlled deployment device

摘要

A stent graft deployment device assembly (10) has a cylindrical fixed handle (6) to be gripped and held by a user and an tubular release handle (30) extending through the fixed handle. The release handle can be moved through the fixed handle. The deployment device assembly has a pusher assembly and a sheath (18) to cover a stent graft on the pusher assembly. The pusher assembly is connected to the fixed handle and the sheath is connected to the release handle so that retraction of the release handle through the fixed handle causes the sheath to be retracted from the stent graft on the pusher assembly. The fixed handle has a rotator component (36) with internal first and second screw threads. The tubular release handle has an external screw thread (31) which engages with the first screw thread. The external screw thread (31) can extend along part, all or in segments along the release handle. A release clamp (48) on the pusher has pins which engage with the second screw thread. Movement of the rotator component with respect to the fixed handle first moves the tubular release handle with respect to the fixed handle and subsequently moves the release clamp on the pusher and thereby pulls the trigger wires.

主权项

1. An endovascular introducer comprising in combination, a handle assembly, a stent graft deployment device and a stent graft retained on the stent graft deployment device;
the handle assembly including a fixed handle and a release handle, the release handle to be moved relative to the fixed handle, the fixed handle comprising a fixed portion to be gripped and held by a user and a rotating portion to be rotated, the rotating portion of the fixed handle and the release handle comprising co-acting first screw threads whereby rotation of the rotating portion of the fixed handle causes relative longitudinal motion between the fixed handle and the release handle; the deployment device including a pusher assembly, the stent graft being mounted onto the pusher assembly and a sheath to cover the stent graft on the pusher assembly and to retain the stent graft in a compressed condition on the pusher assembly, the sheath being relatively movable with respect to the pusher assembly, the pusher assembly being connected to the fixed handle and the sheath being connected to the release handle; whereby retraction of the release handle with respect to the fixed handle by the relative rotation thereof causes the sheath to be retracted at least partially from the stent graft on the pusher assembly, wherein the fixed portion of the fixed handle engages the pusher and the rotating portion of the fixed handle engages a release clamp on the pusher, the release clamp being movable longitudinally with respect to the pusher, the release clamp on the pusher having attached thereto trigger wires for the release of the stent graft from the pusher assembly, whereby rotation of the rotating portion of the fixed handle moves the release clamp on the pusher and thereby pulls the trigger wires to release the stent graft from the pusher assembly.