| 摘要 |
PURPOSE: A stent used for narrowed lesion region of inner cavity of human body is provided to improve major function of stent like extensibility and flexibility and to secure convenience of surgical operation and stability of surgical operation. CONSTITUTION: A stent comprises: a first band part(B1) composed of a spirally rolled first wire(W1) to form a cylindrical shape; a second band part(B2) composed of a spirally rolled second wire(W2) by intersection of straight line portions; a third band part(B3) composed of a spirally rolled third wire(W3); and a fourth band part(B4) composed of a spirally rolled fourth wire(W4). The first wire and the second wire are rolled toward same spiral direction. The third wire and the fourth wire are rolled toward the opposite direction of the first wire.
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