Sterile catheter pullback mechanism assemblies
One aspect of the invention provides catheter pullback apparatuses in which a reusable drive component is enclosed in a sterile disposable barrier enclosure, such as a polymeric sheath/bag. In one embodiment, the reusable drive component includes a pullback carriage that is magnetically coupled, through the sterile barrier, to a slideable catheter shuttle adapted to retain a catheter hub of a catheter. In another embodiment, a sterile barrier-enclosed drive component is inserted into a housing, in which process a piercing tip provided on the catheter shuttle pierces the enclosure and mechanically mates the slideable catheter shuttle and pullback carriage. In this manner, non-sterility of the operating environment is minimized.
1 . A catheter pullback apparatus, comprising:
a reusable elongate drive unit comprising a pullback carriage;
a sterile barrier enclosure sized and configured to surround the reusable elongate drive unit; and
a base unit sized and configured to receive the reusable elongate drive unit surrounded by the disposable sterile barrier enclosure; and
a catheter shuttle slideably engaged with the base unit and operably coupleable to the pullback carriage of the reusable elongate drive unit.
2 . The apparatus of claim 1 , wherein the disposable sterile barrier enclosure is polymeric and disposable.
3 . The apparatus of claim 1 , wherein the catheter shuttle is magnetically coupleable to the pullback carriage of the reusable elongate drive unit.
4 . The apparatus of claim 1 , wherein the catheter shuttle comprises a piercing member and the catheter shuttle pullback carriage are mutually adapted to mechanically couple via the piercing member.
5 . The apparatus of claim 1 , wherein the base unit comprises a fixed cutting member sized and configured to slit the sterile barrier enclosure upon insertion of the motor drive unit into the base unit.
6 . A method for controlling the position of an endoluminal catheter, comprising the steps of:
providing a catheter pullback apparatus according to claim 1 ;
securing the a longitudinally displaceable shaft/element of an endoluminal catheter to the catheter shuttle; and
selectively longitudinally displacing the pullback carriage to longitudinally displace the catheter shaft/element.