STENT AND TREATMENT DEVICE FOR TUBULAR ORGAN
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United States of America Patent
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Issued Date -
Sep 30, 2010
app pub date -
Jan 22, 2008
filing date -
Feb 20, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
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.
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