Retraction Mechanism and Method for Graft Cover Retraction
First Claim
1. A graft delivery system comprising:
- a graft cover retractor including;
a hollow slotted screw gear including an outer surface, and threads extending from the outer surface;
a hollow graft cover advance nut having;
a first inner surface;
a second inner surface distal to the first inner surface;
a proximal end edge surface positioned between the first inner surface and the second inner surface;
andthreads extending from the second inner surface, wherein the hollow slotted screw gear is mounted within the hollow graft cover advance nut so that threads of the hollow slotted screw gear engage the threads of the hollow graft cover advance nut; and
a spacer graft cover anchor having;
a distal end configured to removably fit within a proximal end of the hollow graft cover advance nut between threads of the hollow slotted screw gear and the first inner surface of the hollow graft cover advance nut; and
affixed to a graft cover,wherein when the distal end of the spacer graft cover anchor is within the proximal end of the hollow graft cover advance nut and is in contact with the proximal end edge surface of the hollow graft cover advance nut, and the hollow graft cover advance nut is rotated about the hollow slotted screw gear in a first rotational direction, the graft cover is retracted; and
when the distal end of the spacer graft cover anchor is within the proximal end of the hollow graft cover advance nut and the spacer graft cover anchor is slid in a proximal direction longitudinally along the hollow slotted screw gear, the distal end of the spacer graft cover anchor is removed from within the proximal end of the hollow graft cover advance nut, and the graft cover also is retracted by the sliding.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent or stent-graft delivery system includes a handle having a graft cover retractor having a screw gear and a drive and quick release assembly. The drive and quick release assembly includes a proximal portion and a distal portion that are separable. The proximal portion of the drive and quick release assembly rotates in a first rotational direction about the screw gear to retract the graft cover using the screw gear. The drive and quick release assembly transitions from retraction using the engagement with the screw gear to retraction by sliding by the user grasping the distal portion instead of the proximal portion, and sliding the proximal portion only along the screw gear. In transitioning from using the screw gear to sliding along screw gear, it unnecessary to push any button and unnecessary for the user to remove her/his hand from the assembly.
-
Citations
20 Claims
-
1. A graft delivery system comprising:
a graft cover retractor including; a hollow slotted screw gear including an outer surface, and threads extending from the outer surface; a hollow graft cover advance nut having; a first inner surface; a second inner surface distal to the first inner surface; a proximal end edge surface positioned between the first inner surface and the second inner surface; and threads extending from the second inner surface, wherein the hollow slotted screw gear is mounted within the hollow graft cover advance nut so that threads of the hollow slotted screw gear engage the threads of the hollow graft cover advance nut; and a spacer graft cover anchor having; a distal end configured to removably fit within a proximal end of the hollow graft cover advance nut between threads of the hollow slotted screw gear and the first inner surface of the hollow graft cover advance nut; and affixed to a graft cover, wherein when the distal end of the spacer graft cover anchor is within the proximal end of the hollow graft cover advance nut and is in contact with the proximal end edge surface of the hollow graft cover advance nut, and the hollow graft cover advance nut is rotated about the hollow slotted screw gear in a first rotational direction, the graft cover is retracted; and when the distal end of the spacer graft cover anchor is within the proximal end of the hollow graft cover advance nut and the spacer graft cover anchor is slid in a proximal direction longitudinally along the hollow slotted screw gear, the distal end of the spacer graft cover anchor is removed from within the proximal end of the hollow graft cover advance nut, and the graft cover also is retracted by the sliding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
14. A graft delivery system comprising:
a graft cover retractor including; (i) a hollow screw gear including; a first screw gear part; and a second screw gear part,
wherein a first separation between the first screw part and the second screw gear part defines a first longitudinal slot and a second separation between the first screw part and the second screw gear part defines a second longitudinal slot;(ii) a screw gear drive assembly mounted on the screw gear comprising; a hollow graft cover advance nut including;
a proximal portion having;a proximal end edge surface; and a first inner surface comprising a circumferential surface bounding a volume,
wherein the proximal end edge surface is located at a distal end of the volume, and
a proximal end of the volume is open; anda plurality of screw gear teeth formed on a second inner surface of the graft cover advance nut, wherein the second inner surface is distal to the proximal end edge surface of the graft cover advance nut; and (iii) a spacer graft cover anchor having; an outer body, extending around the screw gear, including a distal end edge configured to be removably positioned within the volume; an inner body, positioned within the hollow screw gear, affixed to a graft cover; a first spacer extending through the first longitudinal slot, and connecting the inner body to the outer body; and a second spacer extending through the second slot, and connecting the inner body to the outer body. wherein when (i) the distal end of the spacer graft cover anchor is within the proximal end of the hollow graft cover advance nut and is in contact with the proximal end edge surface of the hollow graft cover advance nut, and (ii) the hollow graft cover advance nut is rotated about the hollow screw gear in a first rotational direction, the graft cover is retracted; and when the distal end of the spacer graft cover anchor is within the proximal end of the hollow graft cover advance nut and the spacer graft cover anchor is slid in a proximal direction longitudinally along the hollow screw gear, the distal end of the spacer graft cover anchor is removed from within the proximal end of the hollow graft cover advance nut, and the graft cover also is retracted by the sliding. - View Dependent Claims (15, 16, 17, 18, 19)
-
20. A method of operating a graft delivery system comprising:
-
grasping a distal portion of a drive and quick release assembly and rotating the drive and quick release assembly in a first rotational direction along a screw gear to longitudinally move a graft cover in a first direction; and changing the grasping to a proximal portion of the drive and quick release assembly and sliding only the proximal portion of the drive and quick release assembly longitudinally along the screw gear.
-
Specification