单项选择题
A.臂丛神经阻滞 B.骶管阻滞 C.肋间神经阻滞 D.硬膜外腔阻滞 E.坐骨-股神经阻滞
A.80~90mmHg B.90~100mmHg C.100~110mmHg D.110~120mmHg E.120~130mmHg
A.40mmHg B.50mmHg C.60mmHg D.70mmHg E.80mmHg