单项选择题
某下肢动脉硬化闭塞患者,行下肢动脉造影、球囊扩张术,遵医嘱血液肝素化,肝素配制及给药正确的是()
A.抽1ml肝素钠,0.9%生理盐水稀释到10ml,静推4ml
B.抽1ml肝素钠,0.9%生理盐水稀释到20ml,静推4ml
C.抽2ml肝素钠,0.9%生理盐水稀释到10ml,静推4ml
D.抽1ml肝素钠,0.9%生理盐水稀释到10ml,静推2ml
E.抽2ml肝素钠,0.9%生理盐水稀释到10ml,静推2ml
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