| 摘要 |
One embodiment of the apparatus comprises a housing with a sheath portion projecting distally therefrom. The sheath portion has a sheath with a lumen, and a bearing surface in the sheath lumen or aligned with the sheath lumen, and located at or near a distal end of the sheath. The implant is at least partially positioned in the apparatus, and comprises an implant body and a tether connected to the implant body. The tether extends from the implant body distally within the sheath portion and around the bearing surface, where the tether changes direction, and extends back proximally from the bearing surface along and within the sheath portion. The apparatus is configured to move the first tether portion proximally and thereby draw the implant body distally along and within the sheath lumen. |
| 主权项 |
1. An apparatus for delivering an implant into a hollow anatomical structure, wherein the implant comprises an implant body and a tether having a first portion and a second portion, the first portion being coupled to a distal end of the implant body, the apparatus comprising:
a housing defining an inner chamber and configured to contain the implant body within the inner chamber; an outer sheath having a proximal end attached to the housing and a distal end, the outer sheath defining a first lumen extending between the proximal and distal ends of the outer sheath; an inner sheath, at least a portion of which is contained within the first lumen and defining a space within the first lumen exterior to the portion of the inner sheath contained within the first lumen, the inner sheath having a distal end in the first lumen and defining a second lumen extending between the distal end of the inner sheath and a proximal end of the inner sheath, wherein the first lumen is configured to receive the first portion of the tether extending through the space, instead of the second lumen, in a distal direction, wherein the space is in communication with the inner chamber of the housing, and wherein the inner sheath is configured to receive the second portion of the tether extending in a proximal direction through the second lumen; a bearing surface in the first lumen adjacent the distal end of the outer sheath and the distal end of the inner sheath, the bearing surface configured to engage the tether between the first and second portions of the tether so as to cause the second portion of the tether to enter the distal end of the inner sheath and to extend in the proximal direction through the second lumen; and a tether movement mechanism operatively associated with the housing and configured to couple to the second portion of the tether, the tether movement mechanism being operable to move the second portion of the tether proximally within the second lumen and towards the tether movement mechanism, thereby to draw the implant body distally from the inner chamber of the housing and through the space of the first lumen; and further comprising an arched wall extending radially from the distal end of the inner sheath, an outer surface of the arched wall defining at least a portion of the bearing surface. |
