植入性大腿假肢经皮密封部位的动态应力分析

Dynamic stress analysis of percutaneous seal site for artificial leg

目的验证带孔弧形圆盘经皮器件设计的合理性。方法通过对不同结构形态的经皮器件在人体生理活动情况下,经皮器件-软组织界面与附近软组织应力分布进行理论计算和分析,并对经皮器件结构参数进行分析和优化。结果带孔弧形圆盘状经皮器件生物力学性能良好,利于生物密封;网孔圆盘孔径为20mm、孔间距为20mm的设计力学特性较好。结论初步证明了带孔弧形圆盘经皮器件设计的合理性。

Objective To prove design rationality of percutaneous device with arch perforated flange.Methods Stress distribution of percutaneous device（PD）/soft tissue interface and jacent soft tissue of percutaneous devices with different structure were calculated and analyzed in physiological state of human body,and texture parameters of percutaneous device were optimized and analyzed.Results Percutaneous device with arch perforated flange can provide good mechanical circumstances for realization of biological seal and the design of net with 20mm pore diameter and 20mm pore interval demonstrated better mechanical characteristics.Conclusion Preliminary experiment shows design rationality of percutaneous device with arch perforated flange.