RESUMO
Objective To study the influences of hemolysis, fatty blood, storage temperature and storage time on blood HIV RNA and HBV DNA. Methods The HBV DNA and HIV RNA samples (the concentration was 12-30 times of limit of detection of reagent), which were stored for 4 h, 1 d, 3 d,1 w and 4 w under the conditions of 4℃, 25℃, 37℃and-30℃, were detected using Roche MPX V2.0 kit. The HBV DNA and HIV RNA samples (the concentration was 2-5 times of limit of detection of reagent) were detected by the 6 groups of hemolytic samples (the concentrations of hemoglobin were 97 g/L, 34 g/L,17 g/L, 8 g/L, 5 g/L and 3 g/L, respectively). NAT test was performed at 5-group lipid samples (the concentrations of triglyceride were 7.93 mmol/L, 3.80 mmol/L, 2.63 mmol/L, 1.83 mmol/L and 1.49 mmol/L, respectively) and the control group samples (the concentrations of hemoglobin and triglyceride were 0 g/L and 0.95 mmol/L respectively). Results There were no significant differences in Ct values of HIV RNA or HBV DNA between 4 h to 4 w at 25℃(P>0.05). There were significant differences in Ct values of HBV DNA after preservation for 3 d and 1 w under 37 ℃ compared with those of preservation for 4 h,1 d and 2 d (P<0.005). When Hb concentration was reached to 97 g/L, the results of HBV DNA and HIV RNA were negative. When the concentration of Hb was less than 34 g/L, compared with the control group, there were no significant differences in Ct values of HIV RNA and HBV DNA (P>0.05). When the TG concentration was≤7.93 mmol/L, there were no significant differences in Ct values between the control group and the TG group (P>0.05). Conclusion The samples of HIV RNA and HBV DNA detected by Roche MPX V2.0 kit can be stored at room temperature (25℃) for four weeks. When the concentrations of TG and Hb are less than 7.93 mmol/L and 34 g/L respectively, there are no effects on HIV RNA or HBV DNA samples detected by Roche MPX V2.0 kit.
RESUMO
Objective To study the influences of hemolysis, fatty blood, storage temperature and storage time on blood HIV RNA and HBV DNA. Methods The HBV DNA and HIV RNA samples (the concentration was 12-30 times of limit of detection of reagent), which were stored for 4 h, 1 d, 3 d,1 w and 4 w under the conditions of 4℃, 25℃, 37℃and-30℃, were detected using Roche MPX V2.0 kit. The HBV DNA and HIV RNA samples (the concentration was 2-5 times of limit of detection of reagent) were detected by the 6 groups of hemolytic samples (the concentrations of hemoglobin were 97 g/L, 34 g/L,17 g/L, 8 g/L, 5 g/L and 3 g/L, respectively). NAT test was performed at 5-group lipid samples (the concentrations of triglyceride were 7.93 mmol/L, 3.80 mmol/L, 2.63 mmol/L, 1.83 mmol/L and 1.49 mmol/L, respectively) and the control group samples (the concentrations of hemoglobin and triglyceride were 0 g/L and 0.95 mmol/L respectively). Results There were no significant differences in Ct values of HIV RNA or HBV DNA between 4 h to 4 w at 25℃(P>0.05). There were significant differences in Ct values of HBV DNA after preservation for 3 d and 1 w under 37 ℃ compared with those of preservation for 4 h,1 d and 2 d (P<0.005). When Hb concentration was reached to 97 g/L, the results of HBV DNA and HIV RNA were negative. When the concentration of Hb was less than 34 g/L, compared with the control group, there were no significant differences in Ct values of HIV RNA and HBV DNA (P>0.05). When the TG concentration was≤7.93 mmol/L, there were no significant differences in Ct values between the control group and the TG group (P>0.05). Conclusion The samples of HIV RNA and HBV DNA detected by Roche MPX V2.0 kit can be stored at room temperature (25℃) for four weeks. When the concentrations of TG and Hb are less than 7.93 mmol/L and 34 g/L respectively, there are no effects on HIV RNA or HBV DNA samples detected by Roche MPX V2.0 kit.