Apparatus for folding or unfolding a medical implant, and implant
The present invention relates to an apparatus ( 100 ) for folding or unfolding at least one medical implant ( 300 ) by using at least one tension thread ( 11, 11 ′), wherein the apparatus ( 100 ) includes a shaft ( 1 ) including a reception area ( 55 ) for receiving the implant ( 300 ), and a tensioning device for altering a shape of the foldable and/or unfoldable implant ( 300 ) by the tension thread ( 11, 11 ′).
1. A foldable and/or unfoldable medical implant comprising:
at least three tension threads for folding and/or unfolding the implant; and
at least one first ring having a channel for guiding some or all of the tension threads around the implant at an outside or an circumference thereof, wherein three of the tension threads are wound along or around the outside or circumference of the implant in a manner such that each part of the outside or circumference is covered or contacted by two of the tension treads,
the medical implant further comprises at least a second ring having a channel, and at least three posts, the at least three posts being arranged between the first ring and the second ring in order to connect them with each other and/or to maintain the distance between them, each of the at least three posts having at least two openings through which the tension threads are guided from an inside of the implant to an outside of the implant and back from the outside to the inside, wherein the tension threads are guided to the outside through a first opening of a first one of the posts and back to the inside through a second opening of a second one of the posts, the first opening being different from the second opening, and the first post being different from the second post.
2. A medical implant according to claim 1 , comprising exactly three posts.
3. A medical implant according to claim 1 , wherein the tensioning threads are guided around the first ring and/or the second ring such that each part of the first ring and/or the second ring is covered or contacted by two of the tension threads.
4. A medical implant according to claim 1 , wherein the implant is a stent or a cardiac valve assembly.
5. An apparatus comprising the at least one medical implant of claim 1 , and is configured to fold or unfold the at least one medical implant by altering the tension applied to the medical implant by means of six tension threads, wherein the apparatus includes or is connect to: a shaft including a reception or retaining area for receiving the implant; and a tensioning device for altering a shape of the foldable and/or unfoldable implant that is connected and arranged to apply tension onto the medical implant via all six tension threads.
6. An apparatus according to claim 5 , wherein an interior of the shaft is permeable or may be passed in at least sections thereof in the longitudinal direction of the shaft, wherein the shaft has a wall, wherein the shaft includes at least three shaft apertures through which tension threads, for folding and/or unfolding the implant may enter and/or exit, wherein tension threads for folding and/or unfolding of the implant are interconnected with the tensioning device of the apparatus,
wherein the tension threads are guided from an inside of the shaft to an outside of the shaft and back from the outside to the inside, wherein the tension threads are guided to the outside through a first aperture of the shaft apertures and back to the inside through a second aperture of the shaft aperture, wherein the first and the second apertures are different from each other.
7. An apparatus according to claim 5 , wherein the apparatus comprises three shaft apertures, and wherein through each of the three apertures two tension threads enter or exit.
8. An apparatus according to claim 5 , wherein an interior of the shaft is permeable or may be passed in at least sections thereof in the longitudinal direction of the shaft, wherein the shaft has a wall, wherein the shaft includes at least three shaft apertures through which tension threads for folding and/or unfolding the implant may enter and/or exit, wherein tension threads for folding and/or unfolding of the implant are interconnected with the tensioning device of the apparatus, wherein the tension threads are guided from an inside of the shaft to an outside of the shaft and back from the outside to the inside, wherein the tension threads are guided to the outside through a first apertures and back to the inside through a second aperture, wherein the first and the second apertures are different from each other.
9. An apparatus according to claim 5 , wherein the apparatus comprises three shaft apertures, and wherein through each of the three apertures two tension threads enter or exit.
10. A medical implant according to claim 1 , comprising exactly three posts.