亚硝酸盐测定和染色镜检对尿路感染的临床意义

目的：探讨亚硝酸盐测定和染色镜检两者在尿路感染的诊断应用。方法：对中段尿作细菌定量培养，同时行尿常规亚硝酸盐测定和尿染色镜检细菌。结果：亚硝酸盐测定对尿路感染的诊断灵敏度为62．8％，特异度为96．3％，阳性预测值为75．9％，阴性预测值为93．3％。染色镜检细菌对尿璐感染的诊断灵敏度为85．7％，特异度为94．1％，阳性预测值为73．2％。阴性预测值为9r7．3％。两法相结合的诊断灵敏度为57．1％，特异度为99．7％，阳性预测值为97．6％，阴性预测值为92．6％。结论：亚硝酸盐检测和染色镜检相结合能够帮助临床较快地诊断尿路感染。

The clinical significance of nitrite test and bacterial staining microscopy in diagnosis of urinary tract infection

Objective To evaluate the use of nitrate test and bacterial staining microscopy in the diagnosis of urinary tract infection(UTI).Methods Mid-stream urine underwent bacterial quantitative culture and urine routine tests by nitrite determination and staining microscopy.Results The nitrite test showed its sensitivity for UTI was 62.8%,specificity 96.3%,positive predictive value 75.9% and negative predictive value 93.3%.It was shown in staining microscopy that the sensitivity for UTI was 85.7%,specificity 94.1%,positive predictive value 73.2% and negative predictive value 97.3%.For combination of the two means the sensitivity for UTI was 57.1%,specificity 99.7%,positive predictive value 97.6% and negative predictive value 92.6%.Conclusion The combination of the two means could be used for rapid diagnosis of UTI.