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Objective To evaluate analytical performance of homocysteine (Hcy) by circulating enzymatic method .Methods Re‐ferring to CLSI evaluation project and pertinent literature ,and by combining our actual works .we designed a verification procedure and experimental method .By using these above ,the precision ,accuracy ,analytical measurement range ,clinical reportable range of Hcy by circulating enzymatic method were evaluated .Results would be compared with the declaration of the manufacturer (NingBo Medical System Biotechnology Co .,Ltd) or desirable specifications derived from biologic variation .Results The results showed that the within‐run CV were 1 .26% and 0 .84% ,and the total CV were 1 .36% and 1 .32% ,less than 10% of the manufacturer′s statement .The relative bias between the results measured for calibrator at tow levels and target value was 3 .69% and 0 .69% ,less 10% .AMR was 3 .38-51 .81 μmol/L ,and the most suitable dilution rate was 1∶3 ,so the CRR was 3 .38-155 .43 μmol/L .Con‐clusion The analytical performance of Hcy analyzed by circulating enzymatic method is consistent with the standards which manu‐facturers has proclaimed ,so it is conform to the requirements of clinical .
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Objectives To investigate the effect of bladder function and behavior change training on urinary retention after epidural anesthesia and the method to decrease it. Methods 265 patients receiv-ing operation under epidural anesthesia were divided into two groups, the experimental group (132 cases) and the control group (133 cases). The experimental group was further divided into 3 groups: one to two days of training, 3 to 4 days of training and above 5 days of training preoperation. The experimental group carried out bladder function and behavior change training, but the control group never undertook any train-ing. After operation the data were analyzed. Results The incidence of urinary retention was significantly different between the experimental group and the control group (P<0.01);The time length of the training before operation aorrelated with incidence of urinary retention(P<0.05). Conclusions Bladder function and behavior change training contributed to decrease urinary retention after epidural anesthesia.The training time and incidence of urinary retention showed inverse proportion. This could decrease the opportunity of suffering from urethral catheterization and urinary tract infection.