L-8900氨基酸分析仪血浆氨基酸生物参考区间的建立

The plasma amino acids biological reference intervals of L-8900 amino acid analyzer

目的用国产试剂取代原装试剂并统计得出L-8900氨基酸分析仪血浆氨基酸生物参考区间,为临床诊断提供服务。方法用国产试剂与原装试剂检测标准品和同一批血浆(50例),并进行比较,观察其性能指标(包括分离度和重复性)及准确度;使用国产试剂检测400例健康人的血浆游离氨基酸水平以建立血浆氨基酸生物参考区;同时与肝功能指标进行相关性分析。结果 (1)连续5次检测氨基酸标准品得出其峰分离度高,峰保留时间和峰面积重复性高,国产试剂准确度好。(2)统计得出19种氨基酸的生物参考区间,其中10种氨基酸存在性别差异。(3)丙氨酸氨基转移酶(ALT)水平与苏氨酸水平呈负相关(P<0.05),血糖(GLU)水平与缬氨酸、异亮氨酸、亮氨酸水平呈正相关(P<0.05),总胆固醇(CHO)水平与异亮氨酸水平呈负相关(P<0.05)。结论国产试剂可以替代原装试剂,在此基础上得出血浆氨基酸生物参考区间对临床诊断及预后具有重要意义。

Objective To calculate the biological reference of plasma amino acid on L-8900 amino acid analyzer and to provide reference for clinical diagnosis with domestic reagents replacing original reagent .Methods By testing the original standards and the same batch of plasma (50 cases) ,we compared original reagents with domestic reagents for their performance (including resolution , repeatability ,accuracy ) .We tested the plasma free amino acids of 400 cases of healthy people using the domestic reagents to estab-lish biological reference interval of plasma amino acid ,and do correlation analysis between the amino acids level and liver function . Results (1)Domestic reagents showed high accuracy in the results of 5 consecutive detection of amino acids were high peak separa-tion and high peak retention time and high peak area .(2)Statistics derived biological reference interval of 19 amino acids and 10 kinds of amino acids had significant differences .(3)Correlation analysis showed that ALT and liver function were negatively corre-lated with threonine(P<0 .05) .GLU and valine ,isoleucine ,leucine were positively correlated(P<0 .05) .CHO and negatively cor-related with isoleucine(P<0 .05) .Conclusion Domestic agents can replace the original reagents ,on the basis ,the biological refer-ence intervals of plasma amino acids have great importance to clinical diagnosis and prognosis .