This study was conducted to examiune the fibrotic effect of Ni Ti and 317L alloys in esophagus. The extract fluid from Ni Ti,317L alloys was made according to the ASTM standards of U.S.A.

• 为探讨新型支架材料 Ni- Ti、317L合金在食管局部的致纤维化作用 ,按美国 ASTM标准制备 Ni Ti、317L合金的金属浸提液 ;