| 摘要 |
A tether assembly for a delivery tool that deploys an implantable medical device includes an elongate shaft and an attachment member coupled to a distal end of the shaft, wherein the attachment member includes an external thread and an end wall, the end wall extending orthogonally with respect to a direction of travel within a valley of the external thread to provide a hard stop for a threaded attachment bore of the medical device, when the bore is mated with the external thread. The tether assembly may extend within a lumen defined by an elongate tube of an inner assembly of the delivery tool, such that the attachment member thereof is located in proximity to a distal member of the inner assembly, the distal member being coupled to a distal end of the tube and forming a distal opening of the lumen. |
| 主权项 |
1. A delivery tool for an implantable medical device, the medical device including an hermetic enclosure, a pulse generator contained within the enclosure, a fixation member coupled to a distal end of the enclosure, and a threaded attachment bore located in proximity to a proximal end of the enclosure, and the tool comprising:
a handle assembly including a first control member, a second control member, a proximal port, and a valve member coupled to the second control member and being in-line with the proximal port; an inner assembly including an elongate tube and a distal member, the tube including a proximal end fixed within the handle assembly in proximity to the valve member, the tube defining a longitudinally extending lumen, the lumen being in-line with the valve member, and the distal member being coupled to a distal end of the tube, the distal member defining a distal opening of the lumen and being configured to conform to the proximal end of the hermetic enclosure of the medical device; an outer elongate deployment tube extending around the tube of the inner assembly and being longitudinally moveable, via the first control member of the handle assembly, relative to the inner assembly, the deployment tube including a distal-most portion defining a distal opening of the deployment tube, and being sized to enclose the medical device and the distal member of the inner assembly; and a tether assembly including an elongate shaft, an attachment member, and a knob, the elongate shaft extending along a longitudinal axis of the tether assembly from a proximal end thereof to a distal end thereof, through the proximal port and the valve member of the handle assembly, and within the lumen of the tube of the inner assembly, the attachment member being coupled to the distal end of the shaft in proximity to the distal member of the inner assembly, and the knob being coupled to the proximal end of the shaft and located outside the handle assembly, proximal to the proximal port; and wherein the attachment member of the tether assembly comprises an external thread and an end wall, the external thread being defined by a peak and a corresponding valley that helically extend around the longitudinal axis, being configured to mate with the threaded attachment bore of the medical device, the end wall joining adjacent proximal sections of the peak to terminate a proximal end of the valley, and the end wall extending orthogonally with respect to a direction of travel within the valley to provide a hard stop for the threaded attachment bore of the medical device, when the bore is mated with the external thread; and the shaft of the tether assembly translates torque, applied to the knob, from the knob of the tether assembly to the attachment member of the tether assembly to detach the tether assembly from the bore of the medical device. |
