在人类桡动脉的变异较常见。过早地从肱动脉分出或肱浅动脉的存在 ,使桡动脉有高的起点 ,加上其前臂背侧浅支的存在提示轴位血管网的血供不足允许上肢存在一部分浅层血管系统。这些变异的浅层动脉与皮下静脉的混淆可以为注射意外和远端肢体坏死作出解释。了解血管变异情况可以 Variants are more common in human radial arteries. Premature detachment of the brachial artery or the presence of the superficial humeral artery results in a high starting point of the radial artery plus the presence of superficial branches of the dorsal forearm suggesting inadequate blood supply to the axial vascular network allowing partial superficial vasculature in the upper extremity . The confusion between these variant superficial arteries and subcutaneous veins can explain the accidental injection and distal limb necrosis. Understand the vascular variation can be