目的：探讨超回流技术在逆行股前外侧皮瓣修复膝关节周围创面中的应用效果。方法2010年2月至2015年8月，应用逆行股前外侧皮瓣修复膝关节周围创面7例。创面伴骨及关节韧带外露，缺损范围15 cm x6 cm -20 cmx10 cm。在行股前外侧带蒂皮...目的：探讨超回流技术在逆行股前外侧皮瓣修复膝关节周围创面中的应用效果。方法2010年2月至2015年8月，应用逆行股前外侧皮瓣修复膝关节周围创面7例。创面伴骨及关节韧带外露，缺损范围15 cm x6 cm -20 cmx10 cm。在行股前外侧带蒂皮瓣逆行移位修复创面的同时，应用“外增压超回流”原理，将旋股外侧动脉降支伴行静脉起始端与创面周围静脉吻合，有效改善皮瓣静脉回流。皮瓣切取范围17 cmx8 cm -23 cmx12 cm。供区直接缝合或游离全厚皮片移植修复。结果7例皮瓣全部成活，未发生血管危象，皮瓣无肿胀。术后随访时间3-16个月，平均随访8个月。皮瓣血运好，外观饱满，质地柔软，色泽与受区相似，无色素沉着，供区无功能障碍。结论采用超回流技术，有效地解决了逆行股前外侧皮瓣静脉回流，提高了皮瓣成活率。展开更多
The buckle and collapse of offshore pipeline subjected to combined actions of tension, bending, and external pressure during deepwater installation has drawn a great deal of attention. Extended from the model initiall...The buckle and collapse of offshore pipeline subjected to combined actions of tension, bending, and external pressure during deepwater installation has drawn a great deal of attention. Extended from the model initially proposed by Kyriakides and his co-workers, a 2D theoretical model which can successfully account for the case of simultaneous tension, bending, and external pressure is further developed. To confirm the accuracy of this theoretical method, numerical simulations are conducted using a 3D finite element model within the framework of ABAQUS. Excellent agreement between the results validates the effectiveness of this theoretical method. The model is then used to study the effects of several important factors such as load path, material prop-erties, and diameter-to-thickness ratio, etc., on buckling behaviors of the pipes. Based upon parametric studies, a few significant conclusions are drawn, which aims to provide the design guidelines for deepwater pipeline with solid theoretical basis.展开更多
文摘目的：探讨超回流技术在逆行股前外侧皮瓣修复膝关节周围创面中的应用效果。方法2010年2月至2015年8月，应用逆行股前外侧皮瓣修复膝关节周围创面7例。创面伴骨及关节韧带外露，缺损范围15 cm x6 cm -20 cmx10 cm。在行股前外侧带蒂皮瓣逆行移位修复创面的同时，应用“外增压超回流”原理，将旋股外侧动脉降支伴行静脉起始端与创面周围静脉吻合，有效改善皮瓣静脉回流。皮瓣切取范围17 cmx8 cm -23 cmx12 cm。供区直接缝合或游离全厚皮片移植修复。结果7例皮瓣全部成活，未发生血管危象，皮瓣无肿胀。术后随访时间3-16个月，平均随访8个月。皮瓣血运好，外观饱满，质地柔软，色泽与受区相似，无色素沉着，供区无功能障碍。结论采用超回流技术，有效地解决了逆行股前外侧皮瓣静脉回流，提高了皮瓣成活率。
基金Project supported by the National Natural Science Foundation of China (No. 51009122)Fundamental Research Funds for the Central Universities (No. 2010QNA4030)the National High-Tech R&D (863) Program of China (No. 2006AA09A105)
文摘The buckle and collapse of offshore pipeline subjected to combined actions of tension, bending, and external pressure during deepwater installation has drawn a great deal of attention. Extended from the model initially proposed by Kyriakides and his co-workers, a 2D theoretical model which can successfully account for the case of simultaneous tension, bending, and external pressure is further developed. To confirm the accuracy of this theoretical method, numerical simulations are conducted using a 3D finite element model within the framework of ABAQUS. Excellent agreement between the results validates the effectiveness of this theoretical method. The model is then used to study the effects of several important factors such as load path, material prop-erties, and diameter-to-thickness ratio, etc., on buckling behaviors of the pipes. Based upon parametric studies, a few significant conclusions are drawn, which aims to provide the design guidelines for deepwater pipeline with solid theoretical basis.
