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《Laboratory Medicine and Clinic》 2010-06
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The natural sedimentation of cryopreserved serum samples on the impact of test results

DIAO Duan-qin,WANG Qian-qing,CHEN Yun-hua.Community Health Service Center of Changqiao District Shanghai 200231,China  
Objective To explore the impact of the natural deposition of serum samples stored at low temperature conditions on the chemical examination results,so to draw the attention of the operator to the problem.Methods Serum samples are stored at 4 ℃ and -18 ℃ cryopreservation for two days,and then take samples out and put them aside at the room temperature.The liquid samples at the top and the bottom were taken out to mensure the protein、enzymes、glucose、 blood lipids and other conventional biochemistry projects.Results There are differences between the the examination results of the top and bottom layer(P0.05),and there are also significant differences in the samples cryopreseaved under the temperature of -18 ℃(P0.01).Conclusion Natural sedimentation of cryopreserved samples in the test results of the top and the bottom were significantly different.Therefore,cryopreserved samples must be mixed to prevent the results of differences between the top layer sample and bottom one.
【CateGory Index】: R446.1
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