Delivery device for an endoluminal prosthesis
View Patent ↗A system for endoluminally delivering and deploying a prosthesis includes a prosthesis comprising a self-expanding stent and a cover for retaining at least a portion of the self-expanding stent. The stent is biased into contact with an inner surface of the cover. The inner surface has a hardness that is equal to or greater than the hardness of the stent. Additional aspects of the invention are disclosed and include a method of manufacturing an endoluminal prosthesis delivery and deployment system.
1. A system for endoluminally delivering and deploying a prosthesis, the system comprising:
a prosthesis having an end portion and a body portion, the end portion including a self-expanding stent having a hardness; and
a cover for maintaining at least a portion of the stent in a compressed state until deployment, the cover having a generally tubular cavity with an inner surface, wherein the stent is biased into contact with the inner surface of the cover, the inner surface having a hardness that is equal to or greater than the hardness of the stent, wherein the inner surface comprises a ceramic material.
2. The system according to claim 1 , wherein the inner surface further comprises PTFE.
3. The system according to claim 1 , wherein the stent is made from a metal selected from stainless steel and nitinol.
4. The system according to claim 1 , wherein the stent further comprises a plurality of radially-disposed barbs.
5. The system according to claim 1 , further comprising a sheath having a sheath lumen, wherein at least a portion of the prosthesis is radially disposed within the sheath lumen in a compressed configuration.
6. The delivery device according to claim 1 wherein:
the inner surface further comprises PTFE;
the stent comprises a plurality of radially-disposed barbs and is made from a metal selected from stainless steel and nitinol; and
the system further comprises a sheath having a sheath lumen, wherein at least a portion of the prosthesis is radially disposed within the sheath lumen in a compressed configuration.
7. A system for endoluminally delivering and deploying a prosthesis, the system comprising:
a prosthesis having an end portion and a body portion, the end portion including a self-expanding stent having a hardness; and
a cover for maintaining at least a portion of the stent in a compressed state until deployment, the cover having a generally tubular cavity with an inner surface, wherein the stent is biased into contact with the inner surface of the cover, the inner surface having a hardness that is equal to or greater than the hardness of the stent, wherein the cover comprises a plastic body with a ceramic inner surface.
8. A method of manufacturing an endoluminal prosthesis delivery and deployment system, the method comprising the steps of:
providing a prosthesis having a proximal end and a distal end, at least one of the proximal and distal ends including a self-expanding stent having a hardness;
providing a cover having a cavity defining an inner surface, the inner surface having a hardness that is equal to or greater than the hardness of the stent; and retaining at least a portion of the stent within the cavity so that the stent is biased into contact with the inner surface, wherein the cover providing step comprises providing a ceramic inner surface.
9. The method according to claim 8 , wherein the cover providing step further comprises providing an inner surface that includes PTFE.
10. The method according to claim 8 , wherein the cover providing step comprises inserting a metal bushing into the cavity, the bushing having an inner lumen that defines the inner surface of the cover.