一位巨幼细胞贫血患儿肌内注射维生素B2(规格0.5mg/ml),按一次剂量为25~50μg给药,应抽取的药液是A:0.025ml~0.05ml B:0....

作者: tihaiku 人气: - 评论: 0
问题 一位巨幼细胞贫血患儿肌内注射维生素B2(规格0.5mg/ml),按一次剂量为25~50μg给药,应抽取的药液是
选项 A:0.025ml~0.05ml B:0.05ml~0.10ml C:0.10ml~0.20ml D:0.15ml~0.30ml E:0.20ml~0.40ml
答案 B
解析 答案为[B]。本题考查重量国际单位的换算。药品规格0.5mg/ml以mg计,给药剂量以μg计,依照1mg=1000ug换算即得。按剂量25μg计算:25(ug)/0.5(mg/ml)=25(ug)/500(ug/ml)=0.05(ml)按剂量50(ug)计算:50(ug)/0.5(mg/ml)=0.10(ml)因此,应抽取的药液是0.05ml~0.10ml(B)。

相关内容:巨幼,细胞,贫血,患儿,肌内,维生素,规格,剂量,应抽,药液,0.025ml,0.05ml

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