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目的：探讨标本放置时间对末梢全血细胞计数的影响。方法：回顾性分析我院2014年1月～2015年1月门诊患者40例的临床资料，用全自动血球计数仪测不同时间血细胞值。结果：RBC、Hb、HGB、HCT、MCV、WBC、MCH、MCHC放置不同时间所测结果利用多样本均数间显著性检验,差异无统计学意义(P>0.05)。5、20、100min各组均值与即刻组比较PLT测定值差异有统计学意义(P<0.05)。5minMPV测定值与即刻测定值比较差异有统计学意义(P<0.05)。结论：采用末梢血稀释标本做血常规测定时，应在5～60min内完成，其结果差异不大，能最大限度的保证结果的准确性，更好的为临床诊断提供依据。
Objective: To investigate the influence of specimen placement time on peripheral whole blood cell count. Methods: The clinical data of 40 outpatients from January 2014 to January 2015 in our hospital were retrospectively analyzed. The blood cell count at different time was measured by automatic blood cell counting. Results: The results of RBC, Hb, HGB, HCT, MCV, WBC, MCH and MCHC were measured at different times. There was no significant difference between the two groups (P> 0.05). The mean PLT values at 5, 20 and 100 min were significantly different from those in immediate group (P & lt; 0.05). 5minMPV measured values and the measured value immediately after the difference was statistically significant (P & lt; 0.05). Conclusion: The peripheral blood dilution samples should be completed within 5 ~ 60min when blood routine tests are performed. The results are not significantly different, which can ensure the accuracy of the results to the maximum extent and provide the basis for clinical diagnosis.