试题与答案

用自动血液分析仪时,首选的抗凝剂是()。 A.肝素 B.枸橼酸钠 C.EDTA-K2

题型:单项选择题 A1/A2型题

题目:

用自动血液分析仪时,首选的抗凝剂是()。

A.肝素

B.枸橼酸钠

C.EDTA-K2

D.草酸盐

E.EDTA-Na2

答案:

参考答案:C

解析:

肝素可以保持红细胞的自然形态,是红细胞渗透脆性试验的理想抗凝剂;枸橼酸钠对凝血因子V有较好的保护作用,使其活性缓慢减低,故常用于凝血项的检查,也用于红细胞沉降率的测定,因毒性小,是输血保养液的成分之一;EDTA-K<sub>2</sub>对血细胞的影响最小,是全血细胞分析的理想抗凝剂;草酸铵对红细胞破坏力较强,保持血小板形态完整适用于血小板计数。肝素可以保持红细胞的自然形态,是红细胞渗透脆性试验的理想抗凝剂;枸橼酸钠对凝血因子V有较好的保护作用,使其活性缓慢减低,故常用于凝血项的检查,也用于红细胞沉降率的测定,因毒性小,是输血保养液的成分之一;EDTA-K<sub>2</sub>对血细胞的影响最小,是全血细胞分析的理想抗凝剂;草酸铵对红细胞破坏力较强,保持血小板形态完整适用于血小板计数。

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