| 摘要 |
PURPOSE:To make the insertion of a detention tool into a biological part easy and to prevent a biological system impaired by performing moderate self- expansion by forming a detention tool main body by mixing a high water absorptive material, and comprising it by setting the contention ratio of the high water absorptive material dif-ferently partially. CONSTITUTION:The contention ratio of the high water absorptive material in both terminal parts 3, 3 of a tube main body 2 is increased higher than that of an intermediate part. Therefore, when water absorption to the tube main body 2 is performed, the main body is expanded as a whole, and inner and outer diameters are increased, however, since the contention ratio of the high water absorptive material at both terminal parts 3, 3 of the tube main body 2 is set higher than that of the intermediate part 4, larger expansion occurs, and it is expanded in horn shape, which enables the tube main body to be staged. The biological system can be prevented impaird since a processing tool main body is expanded extremely moderately and successively. |
