Effect of storage temperature and time on coagulation factor after cryoprecipitated antihemophilic factor melting
Objective To study and compare the effects of different storage temperature and time on coagulation factor after cryoprecipitated antihemophilic factor(CAF)melting,and to provide reference for the establishment of industry stand-ards.Methods From June 2021 to May 2023,a total of 96 bags of CAF were sampled in 4 bags per month,and timely de-tected in the same month.After the CAF was melted in a 37℃ water bath,the mild to moderate lipemic blood was labeled.Each bag of CAF and two 50 mL transfer bags were divided into two bags and two groups of 20 mL each using a sterile adapt-er.One group was placed in a 4℃ refrigerator and the other in a 22℃ water bath for 0 h,4 h,8 h,12 h,24 h and 48 h.Then 2 mL of aseptic sample was taken separately and put into the test tube,and 1mL of sample and 3 mL of buffer were added into the other test tube with the sampling gun and mixed on the machine for testing.The experimental data of 60 bags without mild to moderate lipemic blood cryoprecipitation and coagulation factor were randomly selected and statistically ana-lyzed by SPSS21.0.Results After melting,CAF was stored for 0 h,4 h,8 h,12 h,24 h and 48 h to detect the average content and growth rate of coagulation factor in the two groups:1)Storage at 4℃,factor Ⅷ content was 118.62,111.57(-5.95％),105.51(-11.05％),103.30(-12.92％),94.35(-20.46％)and 83.25(-29.82％)IU/bag,respectively;Storage at 22℃,the factor Ⅷ content was 118.62,112.69(-5.00％),111.41(-6.08％),109.01(-8.10％),101.55(-14.39％)and 92.75(-21.81％)IU/bag,and the storage results of the two groups were compared.At 24 h at 4℃ and 48 h at 22℃,the content of factor Ⅷ had significant statistical significance(P<0.01),and when stored at 22℃,the decay rate of factor Ⅷ was slower;2)When stored at 4℃,the content of factor V was41.19,41.31(0.29％),40.52(-1.64％),40.27(-2.23％),39.05(-5.19％)and 36.99(-10.21％)IU/bag,respectively;Stored at 22℃,the factor V content was 41.19,41.71(1.25％),42.54(3.28％),41.94(1.80％),39.21(-4.80％)and 35.64(-13.48％)IU/bag,respectively.Comparison of storage results between the two groups showed that the content of factor V was statistically significant(P<0.05)and significantly significant(P<0.01)at 4℃48 h and 22℃48 h,respectively,and the decay rate of factor V was fas-ter when stored at 22℃;3)When stored at 4℃,the Fbg content was 268.86,268.17(-0.26％),262.46(-2.38％),270.50(0.61％),267.52(-0.50％)and 261.92(-2.58％)mg/bag,respectively;Stored at 22℃,the Fbg content was 268.86,265.86(-1.12％),264.12(-1.77％),265.89(-1.11％),266.04(-1.05％)and 261.04(-2.91％)mg/bag,respectively.There was no statistical significance between the 2 groups and the original 0 h content in each time period(P>0.05).Conclusion After CAF melting,coagulation factor decreased with the extension of storage time,especially the de-crease of factor Ⅷ,followed by factor V,while Fbg basically unchanged.Comparison between the two groups showed that,factor Ⅷ decay rate is slower,factor V decay rate is faster of storage at 22℃.CAF should be transfused as soon as possible after melting.If the delay is unavoidable,for the delay time less than 12 h,storage at 4℃ is recommended,fot the delay time more than 12 h and less than 24 h,storage at 22℃ is recommended.
cryoprecipitated antihemophilic factor,CAFⅧ factorFactor VFbgfibrinogenstorage temperaturestorage time
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