STENTLESS SUPPORT STRUCTURE
PROBLEM TO BE SOLVED: To provide a stentless support structure capable of being at least partly assembled in situ.SOLUTION: A support structure 10 comprises a braided tube 16 that is very flexible and, when elongated, becomes very long and very small in diameter, thereby being capable of placement w...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a stentless support structure capable of being at least partly assembled in situ.SOLUTION: A support structure 10 comprises a braided tube 16 that is very flexible and, when elongated, becomes very long and very small in diameter, thereby being capable of placement within a small diameter catheter. The support structure is preferably constructed of one or more thin strands 18 of a super-elastic or shape memory material such as Nitinol. When released from the catheter, the support structure folds itself into a longitudinally compact configuration. The support structure thus gains significant strength as the number of folds increases. This radial strength obviates the need for a support stent. The support structure may include attachment points 26 for a prosthetic valve.SELECTED DRAWING: Figure 1
【課題】少なくとも部分的に現位置で組立可能なステントレス支持構造を提供すること。【解決手段】支持構造10は、非常に可撓性であって、引き延ばされた場合、非常に長くかつ直径が非常に小さくなり、それによって、小径カテーテル内に留置可能となる編組管16を備えている。支持構造は、好ましくは、ニチノール等の超弾性または形状記憶材料の1つ以上の細い撚線18から構築される。カテーテルから解放されると、支持構造は、縦方向にコンパクトな構成に折り重なる。支持構造は、したがって、折り目の数が増加するのに伴って、有意な強度を得る。この半径方向強度は、支持ステントの必要性を排除する。支持構造は、人工弁のための取り付け点26を含み得る。【選択図】図1 |
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