| 摘要 |
A flexible tube device has proximal and distal ends, for attachment of the proximal end to a handle assembly of an endoscope. The flexible tube device includes a spiral pipe formed by helically winding an elongate strip of metal. A tubular mesh material is disposed around the spiral pipe. A jacket material is disposed around the tubular mesh material, and formed from rigid resin and non-rigid resin. In the jacket material, a content of the non-rigid resin is higher than a content of the rigid resin at the proximal end. The content of the rigid resin gradually increases from the proximal end toward a first change point predetermined nearer to the proximal end than to the distal end. The content of the rigid resin is higher than the content of the non-rigid resin at the first change point.
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