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AssigneesNational University Corporation University of Fukui, Sapporo Medical University
InventorsToyohiko Sakai, Hideki Hyodoh
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The present invention provides a stent and tubular organ treatment device that can flexibly deform according to a curved portion of a tubular organ, contracts less in the longitudinal direction during insertion, and is easy to handle. A stent (1) is formed into a tubular form by arranging five tubular unit bodies in an axial direction and connecting them by a connecting filament (F). Each tubular unit is formed into a closed loop by cutting a metal wire to a predetermined length, bending it in a zigzag manner in a peripheral direction, and securely connecting both ends thereof. A tubular unit body (W) having two bent portions projected in the axial direction is connected to and rockably retained by a tubular unit body (U1). Similarly, a tubular unit body (V) is rockably retained by the tubular unit body (W), whereby the entire stent can easily deform into a curved shape. Shape-retaining members (X1) and (X2) composed of a shape memory alloy material are attached in the axial direction to the tubular unit bodies to maintain them in a curved state.
A stent formed into a tubular form comprising a plurality of tubular unit bodies arranged in an axial direction, the plurality of tubular unit bodies each being composed of a wire formed into a closed loop and bent in a zigzag manner in a peripheral direction to form a plurality of bent portions spaced apart from one another on both sides, the bent portions each having an anchoring portion, the anchoring portions of the adjacent tubular unit bodies, facing each other, being connected by a connecting filament,
Dependencies are inferred from the claim text.