| 摘要 |
PROBLEM TO BE SOLVED: To endow fine radiation impermeability with maintaining desired flexibility and stiffness by composing a medical transplantation part, i.e., a tube and so forth of a polymer having radiation impermeability which is transparent visually and a radiation impermeable bulking agent including a radiation impermeability component. SOLUTION: A catheter, a stent, a vasis transplantation piece and a device- like medical transplantation part which is similar to them, especially a radiation impermeability tube 20 is made of a radiation impermeability polymer which is transparent visually and a radiation impermeability bulking agent. Polyurethane including di-isocyanate, polyol and chain extender is suitable for the radiation impermeability polymer which is transparent visually and bromine having a concentration of 10 w% to 30 w% is included in polyurethane. A radiation impermeable agent, i.e., barium sulfate, bismuth subcarbonate, tungsten and so forth is used as the bulking agent. Suitably, a combination of the radiation impermeable polymer and the bulking agent is arranged at a periphery of the tube 20. |
