| 摘要 |
In a medical treatment equipment ( 1 ), a sheath body ( 5 ) has a deformed tight coil structure in which a plurality of wire elements ( 7, 8 ) are formed triangular in cross section, and helically wound with one coil line turn alternately arranged in neighborhood of other coil line turn. An apex of the triangular cross section of the one coil line turn facing an inner diameter side of the sheath body 5 , and an apex of the triangular cross section of the other coil line turn facing an outer diameter side of the sheath body 5 . Lateral sides of neighboring triangular cross sections are relatively slidable each other at a mutual neighborhood side ( 9 ) in a radial direction when the sheath body ( 5 ) is bent. This prevents the sheath body ( 5 ) from developing a line gap (C) between coil line turns of the deformed tight coil structure, and protecting the sheath body ( 5 ) against a tensile load which would otherwise be applied when the sheath body ( 5 ) is curvedly bent within a somatic cavity. Further, the sheath body ( 5 ) enables an operator to delineate a clear supersonic image under a supersonic three-dimensional echo.
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