| 摘要 |
<p>The object of the present invention is to present a catheter which can be safely inserted into the body and easily operated in said body. To attain this object, a catherter whose wall has a polylayer structure with more than three layers is provided in the present invention. In said catheter, the mechanical property changes gradually from inside layer to outside layer to obtain the minimum difference of the mechanical property between a pair of layers attaching to each other, so that high interlaminate strength is guaranteed and stress concentration is avoided. Further, in the case where the metal reinforcement is wound on the inner layer to obtain high rigidity, a catheter has a smooth surface without unevenness. <IMAGE></p> |
