目的：解剖学观察肱二头肌腱和前臂内、外侧皮神经之间的解剖位置关系，为肘关节前方入路手术切口设计提供理论依据。方法解剖30例成人肘关节标本，均无外伤、畸形、肿瘤、骨折。其中新鲜冰冻标本8例（性别不详，左5例、右3例），经10%...目的：解剖学观察肱二头肌腱和前臂内、外侧皮神经之间的解剖位置关系，为肘关节前方入路手术切口设计提供理论依据。方法解剖30例成人肘关节标本，均无外伤、畸形、肿瘤、骨折。其中新鲜冰冻标本8例（性别不详，左5例、右3例），经10%甲醛溶液浸泡的标本22例（男12例、女10例，左11例、右11例）。仔细观察肘关节前方的肱二头肌腱和前臂内、外侧皮神经，并测量前臂内、外侧皮神经穿出深筋膜的位置，及其与肱二头肌肌腱之间的解剖位置关系。结果前臂外侧皮神经走行于肘关节的前方偏桡侧，与肱二头肌腱相毗邻，在肱骨外上髁平面下方（20.5±2.5）mm处穿出深筋膜，穿出点与肱二头肌腱桡侧缘之间的水平距离为（12.6±0.9）mm；前臂内侧皮神经沿肱动脉下行，在肱骨内上髁上方约5 cm 处穿出深筋膜，在肱骨内上髁平面处，后支与肱二头肌腱尺侧缘之间的水平距离为（33.1±2.7）mm。两者之间的安全宽度约为40 mm。结论距肱二头肌腱两侧缘之间约40 mm 的宽度为肘关节前方入路的相对安全区域，以肱二头肌腱为参照设计切口，可以减少医源性前臂内、外侧皮神经损伤的发生。展开更多
In this study,a numerical analysis was conducted on the ductile fracture of a 2-mm diameter Mg-1Zn-0.5Mn-0.5Sr-0.1Ca alloy wire during drawing.The hexagonally close-packed crystal structure of Mg alloys causes asymmet...In this study,a numerical analysis was conducted on the ductile fracture of a 2-mm diameter Mg-1Zn-0.5Mn-0.5Sr-0.1Ca alloy wire during drawing.The hexagonally close-packed crystal structure of Mg alloys causes asymmetric fracture behavior,especially in the compression region.The aim of this study is to develop a comprehensive damage model for Mg alloy wire that accurately predicts ductile fracture,with a focus on the compression region.A novel experimental method was introduced to measure the ductile fracture of Mg alloy wires under different stress states.The wire drawing process was simulated using the Generalized Incremental Stress-State dependent damage(GISSMO)Model and the Semi-Analytical Model for Polymers(SAMP)model.The damage model's prediction and the experimental results were found to be in excellent agreement,especially in determining crack initiation.Computational analysis established a safe zone diagram for die angle and reduction ratio,and experimental validation confirmed the feasibility of this approach.The proposed damage model can provide a practical and reliable analysis for optimizing the drawing process of Mg alloy wire.展开更多
文摘目的：解剖学观察肱二头肌腱和前臂内、外侧皮神经之间的解剖位置关系，为肘关节前方入路手术切口设计提供理论依据。方法解剖30例成人肘关节标本，均无外伤、畸形、肿瘤、骨折。其中新鲜冰冻标本8例（性别不详，左5例、右3例），经10%甲醛溶液浸泡的标本22例（男12例、女10例，左11例、右11例）。仔细观察肘关节前方的肱二头肌腱和前臂内、外侧皮神经，并测量前臂内、外侧皮神经穿出深筋膜的位置，及其与肱二头肌肌腱之间的解剖位置关系。结果前臂外侧皮神经走行于肘关节的前方偏桡侧，与肱二头肌腱相毗邻，在肱骨外上髁平面下方（20.5±2.5）mm处穿出深筋膜，穿出点与肱二头肌腱桡侧缘之间的水平距离为（12.6±0.9）mm；前臂内侧皮神经沿肱动脉下行，在肱骨内上髁上方约5 cm 处穿出深筋膜，在肱骨内上髁平面处，后支与肱二头肌腱尺侧缘之间的水平距离为（33.1±2.7）mm。两者之间的安全宽度约为40 mm。结论距肱二头肌腱两侧缘之间约40 mm 的宽度为肘关节前方入路的相对安全区域，以肱二头肌腱为参照设计切口，可以减少医源性前臂内、外侧皮神经损伤的发生。
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(Nos.2020R1A2C2010986,2022M3H4A1A04085301)。
文摘In this study,a numerical analysis was conducted on the ductile fracture of a 2-mm diameter Mg-1Zn-0.5Mn-0.5Sr-0.1Ca alloy wire during drawing.The hexagonally close-packed crystal structure of Mg alloys causes asymmetric fracture behavior,especially in the compression region.The aim of this study is to develop a comprehensive damage model for Mg alloy wire that accurately predicts ductile fracture,with a focus on the compression region.A novel experimental method was introduced to measure the ductile fracture of Mg alloy wires under different stress states.The wire drawing process was simulated using the Generalized Incremental Stress-State dependent damage(GISSMO)Model and the Semi-Analytical Model for Polymers(SAMP)model.The damage model's prediction and the experimental results were found to be in excellent agreement,especially in determining crack initiation.Computational analysis established a safe zone diagram for die angle and reduction ratio,and experimental validation confirmed the feasibility of this approach.The proposed damage model can provide a practical and reliable analysis for optimizing the drawing process of Mg alloy wire.
