Accuracy of Dongjui analyzer for reducing the number of unnecessary urine cultures in an outpatient setting

Year 2022, Volume: 8 Issue: 3, 389 - 395, 04.05.2022

Murat Ozturk Yasemin Üstündağ Atilla Satır Kağan Huysal

https://doi.org/10.18621/eurj.855509

Abstract

Objectives: The purpose of this study was to evaluate the diagnostic performance of the Dongjui DJ-8602 urinary analyzer for reducing the number of unnecessary urine cultures in patients with suspected urinary tract infection (UTI).

Methods: This study was designed as a retrospective study performed in patients with suspected UTI from August 1, 2018 to December 1, 2018. Clinical data, C reactive protein, blood hematologic counts were evaluated. Using positive culture results as the gold standard, the cut-off values by the receiver operating characteristic curve technique, sensitivity, and specificity were calculated.

Results: The median values of urine leukocyte levels were 31 cells/high power field (HPF) in the culture-positive group and 5 leukocytes/HPF in the culture-negative group, respectively. The area under the curve for leukocyte and bacteria count were 0.753 (95% Cl, 0.642 to 0.862) and 0.581 (95% Cl, 0.438 to 0.725), respectively. A leukocyte count ≥ 2 cells/HPF, resulting the best sensitivity of 96.3% (95% Cl: 81.03% to 99.48%) and a negative predictive value (NPV) of 96.4% (95% Cl: 79.35% to 99.48%).

Conclusions: The use of the Dongjui DJ-8602 urinary sediment and chemistry analyzer did not accurately predict the outcome of urine cultures with an unsatisfactory sensitivity and NPVs of bacteria counts.

Keywords

urinary tract infection, urine culture, Urinalysis, ınstrumentation, bacteriuria

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