医药学论文:保存温度与时间对葡萄糖和血脂四项结果的影响
【关键词】 低温保存; 标本; 浓度
The impact of preserving condition (temperature and duration) on blood sample concentration in laboratory assay
CHENG Hong,SHAN Xiao-yi,HAO Yi-mei,et al.Capital Pediatric Institute,Beijing 100020,China
【Abstract】 Objective To examine the impact of preserving condition (temperature and duration) on blood sample concentration in laboratory assay.Methods Venous blood samples were taken after overnight fasting from 10 volunteers,plasma glucose,serum lipids(including TC,TG,LDL-C and HDL-C) were measured by autobiochemistry analyzer.Venous plasmas and serums from subjects were preserved at room temperature (22℃),4℃and -20℃,respectively for various duration to measure the concentration of glucose and lipids.Results At room temperature,the concentration of Glu that was measured decreased significantly by the durations,while it was steady when measured at 4℃ after 2 or 6 hours,or at -20℃ after seven days.There was no significantly difference of HDL-C at 22℃ and 4℃ within different durations.TC,TG and LDL-C were steady at room temperature in 2 hours and at 4℃ in 4 hours.Except for LDL-C,there were different results at -20℃ after 7 days,compared with the instant results.Conclusion The test results of Glu,TC and TG at different durations will not be affected when the specimens of venous blood are preserved at 4℃ or -20℃.
【Key words】 cryopreservation; sample; concentration
无论是在流行病学现场调查中,还是在临床试验中,所采集的血标本往往不能及时送达实验室检测,可能会影响检验结果的准确性和可靠性,标本的保存和检测时间就成为影响检验结果的重要因素,也是临床检验中最常碰到的问题。目前有许多研究都对保存时间和温度对血细胞组分的影响进行了探讨[1~3],但对血脂、血糖检测值影响的研究却很少,为了解不同条件下标本的存放对检测结果的影响,本研究对不同温度和不同时间保存的标本进行了血脂、血糖测定结果的比较。
1 材料与方法
1.1 对象
自愿参加本次实验的10名健康受试者。
1.2 仪器与试剂
采用日立7060C全自动生化分析仪检测,试剂为瑞士Roche公司产品,质控品为瑞士Roche公司的Cfas产品(批号15864/15842)。卫生部老年医学研究所生化室提供定值脂类质控血清。
1.3 采血与检测
受试者隔夜空腹12h后,用BD公司的真空采血管收集抗凝血和非抗凝血,分离血浆和血清,用日立7060C全自动生化分析仪测定血浆葡萄糖(Glu)、血清TC、TG、HDL-C和LDL-C。Glu采用葡萄糖氧化酶法;TC和TG采用酶法;HDL-C和LDL-C采用清除法。标本分离后,每份血清和血浆各分装3管,1管放置室温,余2管密封后分别置于4℃和-20℃冰箱保存,分析存放时间和方式对Glu和血脂4项测定值的影响。检测时间的设置分别为:室温:即刻、2h、4h、6h;4℃: 2h、4h、6h;-20℃:7天。
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