Affiliation:
1. Department of Veterinary Biosciences, College of Veterinary Medicine The Ohio State University Columbus OH 43210 USA
2. Syn Labs VPG/Exeter Exeter UK
3. URIKA, LLC Mukilteo WA USA
Abstract
ObjectivesEvaluate the in‐clinic performance of point‐of‐care sediment analysers, Analyzer V (Vetscan SA, Abaxis) and Analyzer S (SediVue DX, IDEXX), using assayed, bilevel (2 concentrations) urine quality control material to determine if instrument specifications are acceptable for semi‐quantitative clinical urine sediment analysis.Materials and MethodsAccuracy, precision and clinical utility of Analyzer V and Analyzer S measurements were evaluated using a bilevel, assayed quality control material in 23 veterinary practices.ResultsPhotomicrographs taken by the instruments facilitated manual review and quality assessment. Analyzer V and Analyzer S under‐identified the presence of cystine crystals with 83 and 13% inaccuracy in the positive quality control material, respectively. Analyzer V and Analyzer S over‐reported bacteria in the sterile quality control material with 82 and 94% specificity, respectively. Analyzer V and Analyzer S reported RBCs and WBCs within manufacturer specifications with excellent sensitivity (93 to 100%) and specificity (100%).Clinical SignificanceAdditional improvement is needed to better classify crystal types and reduce false positives for bacteria before clinical use. While normal samples can generally be trusted, a manual review of abnormal samples is required to ensure that clinically important urine components are correctly evaluated. Future studies should evaluate the performance of these instruments with species‐specific urine sediment.