Quick release deployment handle for medical devices

A deployment handle assembly for a stent graft delivery device comprising:

• a tubular handle having a proximal end and a distal end and a lumen extending longitudinally therebetween;
• an inner cannula having a proximal end and a distal end, and wherein at least a portion of the distal end of inner cannula extends longitudinally through handle lumen;
• a stent graft carried on the proximal end of the inner cannula;
• a torsion mechanism proximal the distal end of the inner cannula, the torsion mechanism configured to impart axial rotation of the inner cannula relative to the handle;
• an actuation mechanism positioned at the distal end of the handle, the actuation mechanism having a first position in which the actuation mechanism is engaged with the inner cannula to prevent axial rotation of the inner cannula and a second position in which the actuation mechanism is disengaged from the inner cannula to permit axial rotation of the inner cannula relative to the handle;
• wherein the axial rotation of the inner cannula permits release of at least a portion of the stent graft from the delivery device.

A method for deploying an expandable medical device, the method comprising:

• providing a handle, wherein the handle comprises a proximal end and a distal end and a lumen extending longitudinally therebetween;
• an inner cannula having a proximal end and a distal end, and wherein at least a portion of the distal end of inner cannula extends longitudinally through handle lumen;
• a torsion mechanism at the distal end of the inner cannula, the torsion mechanism configured to impart axial rotation of the inner cannula relative to the handle;
• an actuation mechanism positioned at the distal end of the handle, the actuation mechanism having a first position in which the actuation mechanism is engaged with inner cannula to prevent axial rotation of the inner cannula and a second position in which the actuation mechanism is disengaged from inner cannula to permit axial rotation of the inner cannula relative to the handle,
• actuating the actuation mechanism from a first position to a second position to permit axial rotation of the inner cannula;
• and
• releasing at least a portion of an expandable medical device carried on the proximal end of the inner cannula.