[名词解释] 坐高

体重过重 腹围 关于臂丛神经() ["A．臂丛与大血管伴行","B．臂丛周围有臂丛鞘包裹","C．腋鞘与锁骨下血管周围鞘相通","D．腋鞘血管旁间隙与锁骨下血管旁间隙相通","E．腋鞘注入足量美蓝，可扩散到颈神经丛"] 要拇指基底部阻滞完全，需阻滞() ["A．桡神经","B．正中神经","C．尺神经","D．肌皮神经","E．前臂内侧皮神经"] 颈丛阻滞的并发症有() ["A．误入硬膜外腔","B．误入蛛网膜下隙","C．局麻药中毒","D．膈神经阻滞","E．喉返神经阻滞"] 坐高