UF-100尿沉渣分析仪尿液有形成分检测假阳性结果原因分析及其对策

目的探讨影响UF-100尿沉渣分析仪尿液有形成分检测的影响因素，寻找导致其测定假阳性结果的原因及其对策。方法分别采用UF-100尿沉渣分析仪和显微镜检查法对1000例临床尿液标本进行检测，对比两种方法的检测结果，分析引起UF-100尿沉渣分析仪测定假阳性的原因。结果UF-100尿沉渣分析仪检测管型假阳性率为7．3％，粘液丝是引起其假阳性的最主要原因；红细胞假阳性率为11．9％，一定量的结晶、细菌和酵母样菌易被仪器错误报告为红细胞；白细胞的假阳性率为5．9％，小圆上皮细胞、滴虫和大量细菌是引起白细胞假阳性的主要原因；小圆上皮细胞的假阳性率为2．0％，白细胞是导致其计数假阳性的常见原因。结论因多种因素可以影响UF-100尿沉渣分析仪对尿液有形成分的检测结果，出现假阳性，因此，应用UF-100尿沉渣分析仪检测尿液有形成分只能作为一种初步筛查方法，当尿液病理成分检测结果提示增多，同时上述干扰成分亦呈阳性或增多时，沉渣镜检十分重要。

Analysis of factors that disturb UF-100 automated urinalysis analyzer determining urine! particles

Objective To discuss the factors that affect the examination of urine formed dements by UF-100 automated urinalysis analyzer causing false positive by UF-100 and look for the factors and solution metheds.Methods 1,000 urine samples were tested by UF-100 automated urinalysis analyzer and microscopy. The results were contrasted and the false positive reasons were analyzed.Results When using UF-100 automated urinalysis analyzer,the false positive rate of cast is 7.3% and viscose rayon is main agent.The false positive rate of red eell is11.9% .Crystals,bacteria,yeast-like fungus sometimes are regarded as red cell by analyzer.The false positive rate of white cell is 5.9% .Small round cells ,infusofium, lots of bacterium can cause false positive.The false positive rate of small round cells is 2.0%. White cell is the main mason. Conclusion Many factors can affect the examination by UF-100 automated urinalysis analyzerand cause false positive,so UF-100 can only be used for screening.It is very important to observe sediments by microscopic examination when pathologic ingredients in urine are increased and at the same time all above intefferences are posive or increase.