Devices, systems, and methods for prosthesis delivery and implantation, including the use of a fastener tool
Devices, systems, and methods for implanting radially expandable prostheses in the body lumens rely on tacking or anchoring the prostheses with separately introduced fasteners. The prostheses may be self-expanding or balloon expandable, and may include a single lumen or more than one lumen. After initial placement, a fastener applier system is introduced within the expanded prostheses to deploy a plurality of fasteners to at least one prosthesis end. The fasteners are usually helical fasteners which are releasably restrained on the fastener driver, and are delivered by rotation of the fastener driver. The fasteners may be applied singly, typically in circumferentially spaced-apart patterns about the interior of at least one end of the prosthesis. A lumen extension or lumens may be coupled to the prosthesis to extend the reach of the prosthesis within the implantation site. Fasteners may also be applied to the lumen extensions.
1. A method of installing a fastener to a fastener applier comprising
providing an apparatus for storing a fastener, the apparatus comprising a base structure, and at least one receptacle positioned within the base structure, the receptacle sized and configured to releasably store at least one fastener,
providing a fastener applier for securing a prosthesis, the fastener applier comprising a handle assembly positioned at the caudal end of the fastener applier, a fastener applier shaft coupled to the handle assembly, and a fastener driver for advancing a fastener into the prosthesis and tissue, the fastener driver coupled to the fastener applier shaft at the cephalad end of the fastener applier shaft, the fastener driver including a housing and a release latch, wherein the release latch prevents premature release of the fastener from the fastener driver,
positioning the fastener driver so as to allow the fastener driver to couple to releasably stored fastener, and
coupling the fastener to the fastener applier.
2. A method according to claim 1
wherein coupling the fastener to the fastener applier includes operating a motion control assembly positioned on the handle assembly to retract the fastener out of the receptacle and onto the fastener driver.
3. A method according to claim 1
wherein the receptacle is sized and configured to releasably secure at least one helical fastener.
4. A method according to claim 3
wherein the helical fastener includes a fastener body having a distal end for penetrating tissue in response to a force and a proximal end for releasably coupling the fastener body to the fastener applier, and
a stop structure associated with the proximal end to prevent over-penetration of the fastener body into tissue, the stop structure bisecting the diameter of the fastener body.
5. A method according to claim 4
wherein the stop structure is offset from the diameter of the fastener body.