Clinical observation on combined use of dry chemical method and urinary sediment in routine urine examination

Abstract

Objective To study the clinical effect of dry chemical method combined with urinary sediment in routine urine examination. Methods From January 2018 to October 2018, 200 patients with suspected urinary tract infection who underwent routine urine examination in the Traditional Chinese Medicine Hospital of Yuyao were selected for prospective study, and fresh morning urine samples were collected from 200 patients.Urine samples were detected by urine dry chemistry analyzer and urine sediment analyzer respectively, and the urine routine indicators of urine dry chemistry method and urine sediment method were compared.According to the results of urine bacterial culture, the sensitivity, specificity and accuracy of urine dry chemical method, urine sediment method and urine dry chemical method for the diagnosis of urinary tract infection were calculated and compared.Then, the consistency test was used to analyze the consistency of results of urine dry chemistry method, urine sediment method, urine dry chemical method+ urine sediment method with urine bacterial culture. Results (1)There were no statistically significant differences between the results of urine dry chemical method and urine sediment method on the urine red blood cell, white blood cell, transparent tube type and other indicators (t=0.562, 0.343, 0.901, all P>0.05). (2)Among 200 suspected patients with urinary tract infection, 157 patients were confirmed to have urinary tract infection by urine bacterial culture, and the remaining 43 patients had no urinary tract infection.The sensitivity, specificity, accuracy of urine dry chemistry method and urine sediment method in the diagnosis of urinary tract infection had no statistically significant differences (χ2=0.120, 0.081, 0.022, all P>0.05). But the sensitivity, specificity, accuracy of urine dry chemistry method + urine sediment method in the diagnosis of urinary tract infection were 96.18%, 97.67%, 96.50%, respectively, which were higher than those of the urine dry chemistry method and urine sediment method (χ2=6.497, 6.081, 11.923, 8.219, 4.962, 12.858, all P<0.05). According to the consistency analysis, the diagnosis results of urinary tract infection by urine dry chemical method and urine sediment method were in good consistency with the results of urine bacterial culture, with the Kappa value of 0.854, while the consistency of urine dry chemical method, urine sediment method with the urine bacterial culture results were all moderate, with the Kappa value of 0.642 and 0.637, respectively. Conclusion The combination of urine dry chemical method and urine sediment method can improve the accuracy of urine routine examination and improve the value of urine routine examination in the diagnosis of urinary tract infection. Key words: Urinary tract infection; Urine routine; Medical examination; Urine dry chemistry; Urine sedimentation method; Diagnosis; Red blood cell; Leukocyte; Hyaline tube type