Delivery system assemblies and associated methods for implantable medical devices

摘要

A delivery system assembly includes an outer tube, an inner member, extending within a lumen of the outer tube, and a deflectable shaft, extending within the outer tube lumen and around the inner member; the tube and inner member are longitudinally moveable with respect to the shaft, and a distal end of the inner member is located distal to the shaft within the tube lumen. A medical device can be loaded into the tube lumen, along a distal-most portion of the tube, and contained between the inner member and a distal opening of the tube lumen. Deflecting the shaft orients the distal-most portion for navigation of the assembly, and, when the distal end of the inner member is engaged within the tube lumen, distal movement of the tube, with respect to the shaft, causes similar distal movement of the inner member and the loaded medical device toward an implant site.

主权项

1. A delivery system assembly facilitating deployment of an implantable medical device, the assembly comprising:
a handle including a first control member and a second control member; an elongate shaft extending distally from the handle, the shaft including a proximal end fixed within the handle, a deflectable distal end, a lumen extending from a proximal opening thereof at the proximal end to a distal opening thereof at the distal end, and a pull wire, the pull wire including a proximal end coupled to the first control member of the handle and a distal end anchored to the deflectable distal end of the shaft, the first control member for deflecting the shaft via the pull wire; an elongate inner member including an enlarged distal end, the inner member extending within the lumen of the shaft and distally from the distal opening of the shaft lumen to the enlarged distal end, the inner member being longitudinally moveable with respect to the shaft, and the enlarged distal end of the inner member being configured to conform to a proximal end of the medical device; and an elongate outer tube extending distally from the handle and forming a lumen in which the shaft and the inner member extend such that an entirety of the outer tube is longitudinally moveable with respect to the shaft by means of the second control member of the handle, which is coupled to the outer tube, the outer tube including an internal shoulder and a distal-most portion that has a length, along which the lumen of the outer tube extends from the internal shoulder to a distal opening of the lumen, and the lumen of the outer tube, along the length of the distal-most portion, being sized to contain both the enlarged distal end of the inner member and an entirety of the implantable medical device; and wherein, when the enlarged distal end of the inner member is contained within the lumen of the outer tube, along the length of the distal-most portion, and abuts the internal shoulder of the outer tube, and the outer tube is moved longitudinally in a distal direction, the inner member is also moved longitudinally in the distal direction with respect to the shaft.