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    • 10. 发明申请
    • MICROFABRICATED THERAPEUTIC ACTUATORS
    • 微生物治疗执行器
    • WO98037816A1
    • 1998-09-03
    • PCT/US1998/003961
    • 1998-02-27
    • A61B17/00A61B17/12A61M25/16A61B17/28
    • A61B17/1214A61B17/12022A61B2017/00867A61B2017/00871A61B2017/12068A61B2017/12077
    • Microfabricated therapeutic actuators are fabricated using a shape memory polymer (SMP), a polyurethane based material that undergoes a phase transformation at a specified temperature (Tg). At a temperature above temperature Tg material is soft and can be easily reshaped into another configuration. As the temperature is lowered below temperature Tg the new shape is fixed and locked in as along as the material stays below temperature Tg. Upon reheating the material to a temperature above Tg, the material will return to its original shape. By the use of such SMP material, SMP micro-tubing can be used as a release actuator for the delivery of embolic coils (11) through catheters (10) into aneurysms, for example. The micro-tubing (10) can be manufactured in various sizes and the phase change temperature Tg is determinate for an intended temperature target and intended use.
    • 使用形状记忆聚合物(SMP),在特定温度(Tg)下进行相变的聚氨酯基材料制造微制剂治疗致动器。 在高于温度的温度下,Tg材料是柔软的,并且可以容易地重塑成另一种构型。 当温度降低到温度Tg以下时,随着材料保持低于温度Tg,新的形状被固定和锁定。 将材料重新加热到高于Tg的温度时,材料将恢复到原来的形状。 通过使用这种SMP材料,SMP微管可以用作例如通过导管(10)将栓塞线圈(11)输送到动脉瘤中的释放致动器。 微管(10)可以以各种尺寸制造,并且相变温度Tg对于预期温度目标和预期用途是确定的。