Urine sediment examination: a comparison of automated urinalysis systems and manual microscopy

BACKGROUND: Several automated instruments examining urine sediment have been introduced. We compared the performance of Sysmex UF-100 and Iris iQ200 with manual microscopy in urine sediment testing. METHODS: Four hundred and thirty-six urine samples were collected. The urine sediments were examined by manual microscopy and these 2 automated urinalysis systems. RESULTS: The within-run CVs for urine samples ranged from 3.4% to 22.3% for the iQ200, 1.6% to 24.2% for the UF-100 and 12.5% to 43.9% for manual microscopy. Between-run CVs on quality-control samples ranged from 6.1% to 32.4% for the iQ200 and 3.5% to 24.7% for the UF-100. The agreement between methods was good for red blood cells and white blood cells counts based on r values of 0.935 to 0.968. However, for epithelial cells, the values measured by different systems were poorly correlated (r=0.888-0.922). The Bland-Altman plot indicated a trend towards the automated cell count being greater than the manual microscopy as the epithelial cell count increased. Casts were difficulty differentiated by 2 automated systems. CONCLUSIONS: These 2 automated urinalysis systems demonstrated good concordance with each other in urine sediment examination. The automated process could be used as a screening procedure but some manual microscopy was still necessary.     

三种方法在尿液有形成分分析中的对比观察

目的 探讨UF-1000i尿液有形成分分析仪与干化学方法、手工显微镜检查尿中红细胞(RBC)、白细胞(WBC)的符合情况及影响因素.方法 使用UF-1000i 尿有形成分分析仪、干化学分析仪与显微镜分别检测996例尿液标本中RBC、WBC,将3种方法的检测结果进行比较.结果 分别以RBC、WBC超过25和30个/μL为...     

Pediatric reference values for urine particle quantification by using automated flow cytometer: Results of a multicenter study of Italian urinalysis group

Objectives

The purpose of this Italian multicenter study was to define pediatric upper reference values for urine particle quantification by using automated flow cytometry.

Design and methods

Four hospital-based clinical laboratories participated in this multicenter investigation, which included a total study population of 161 Italian children aged from 1 to 12 years. Two laboratories used Sysmex UF-100 and analyzed 86 children, whereas the other two used Sysmex UF-1000i and analyzed 75 subjects. Particle quantification included the analysis of white blood cells (WBC), red blood cells (RBC), squamous epithelial cells (EC), transitional epithelial cells (TC), casts (CAST) and bacteria (BACT).

Results

The upper reference values in subjects tested with the Sysmex UF-100 were 9.7 WBC/μL, 10.1 RBC/μL, 7.5 EC/μL, 2.5 TC/μL, 0.7 CAST/μL and 3090 BACT/μL, whereas the upper reference values in subjects tested with the Sysmex UF-1000i were 10.5 WBC/μL, 8.3 RBC/μL, 7.2 EC/μL, 2.9 TC/μL, 0.7 CAST/μL and 48 BACT/μL. No statistically significant differences between genders were found in the value distribution of any of the parameters tested. Similarly, no statistically significant differences were observed between the two urine analyzers, except for BACT.

Conclusions

Automated analysis of urine particles appears a suitable means to optimize the workflow of routine urinalysis of children specimens. The upper reference limits for pediatric subjects obtained in this study were comparable to those previously reported in the literature, with no significant differences between genders and analyzers.     

Performance of automated urine analyzers using flow cytometric and digital image-based technology in routine urinalysis

Abstract

The purpose of this study was to evaluate the analytical performances of Sysmex UF-5000 and Dirui FUS-200 and to compare the results with manual microscopy and between each other.

Two hundred fifty urine samples were analyzed for evaluation. Mid-stream specimens were studied sequentially using Dirui FUS-200 and Sysmex UF-5000, and also with manual microscopy within one hour. The physical and chemical components of urinalysis, and sediment results were investigated.

The precision results of the FUS-200 and UF-5000 for WBCs, RBCs, and ECs were acceptable. The both analyzers demonstrated good linearity (r?>?0.97), with no carry-over. The comparisons of FUS-200 and UF-5000 with manual microscopy for RBCs, WBCs, and ECs on 250 samples exhibited good agreement with little bias (R?>?0.780). Only, the moderate agreements were obtained for calcium oxalate for both analyzers (R?=?0.512, and 0.648, respectively). The sensitivities of the FUS-200 and UF-5000 were 75.8% and 86.8%, with specificities of 92.3% and 87.8% for WBCs, for RBCs the sensitivities were 91.1%, and 84.4% with specificities of 82.2%, and 89.6% for both analyzers. Kappa values of the UF-5000 were higher than FUS-200 for WBCs, RBCs, ECs, and calcium oxalate.

The FUS-200 and UF-5000 urine analyzers, are both accurate, very precise systems and can be safely used in clinical laboratories. However, due to the technological characteristics of the UF-5000 analyzer, its positive impacts on the morphologic recognition and enumeration of RBCs and WBCs should be taken into account, particularly in university hospital laboratories with high patient volumes.     

应用UF-100全自动尿沉渣分析仪检测浆膜腔积液的作用和意义

目的:探讨UF-100尿液分析仪检测浆膜腔积液的临床价值和意义.方法:运用传统手工镜检法和UF-100全自动尿液分析仪法同时检测患者浆膜腔积液,并比较两种方法对白细胞的检测结果,比较使用UF-100全自动尿液分析仪法检测不同,洼质浆膜腔积液标本白细胞、间皮细胞和细菌数.结果:两种方法中白细胞数(WBC)间存在较高的相关性(P>0.05),漏出性与渗出性浆膜腔积液间白细胞教、间皮细胞、细菌数均存在显著性差异(P<0.05),非化脓性与化脓性细菌感染性积液中WBC数、细菌数差异均有显著性(P<0.05),间皮细胞数差异无显著性(P>0.05).结论:用UF-100尿液分析仪检测胸腹水标本简单、易行,检测结果对相关疾病有更好的临床价值.     

Automated urinalysis: first experiences and a comparison between the Iris iQ200 urine microscopy system, the Sysmex UF-100 flow cytometer and manual microscopic particle counting.

BACKGROUND: Automated analysis of insoluble urine components can reduce the workload of conventional microscopic examination of urine sediment and is possibly helpful for standardization. We compared the diagnostic performance of two automated urine sediment analyzers and combined dipstick/automated urine analysis with that of the traditional dipstick/microscopy algorithm. METHODS: A total of 332 specimens were collected and analyzed for insoluble urine components by microscopy and automated analyzers, namely the Iris iQ200 (Iris Diagnostics) and the UF-100 flow cytometer (Sysmex). RESULTS: The coefficients of variation for day-to-day quality control of the iQ200 and UF-100 analyzers were 6.5% and 5.5%, respectively, for red blood cells. We reached accuracy ranging from 68% (bacteria) to 97% (yeast) for the iQ200 and from 42% (bacteria) to 93% (yeast) for the UF-100. The combination of dipstick and automated urine sediment analysis increased the sensitivity of screening to approximately 98%. CONCLUSIONS: We conclude that automated urine sediment analysis is sufficiently precise and improves the workflow in a routine laboratory. In addition, it allows sediment analysis of all urine samples and thereby helps to detect pathological samples that would have been missed in the conventional two-step procedure according to the European guidelines. Although it is not a substitute for microscopic sediment examination, it can, when combined with dipstick testing, reduce the number of specimens submitted to microscopy. Visual microscopy is still required for some samples, namely, dysmorphic erythrocytes, yeasts, Trichomonas, oval fat bodies, differentiation of casts and certain crystals.     

UF-1000i尿液有形成分分析仪、干化学法和镜检法对尿液分析的比较

目的探讨Sysmex UF-1000i全自动尿液有形成分分析仪（简称UF-1000i）对尿液中红细胞（RBC）、白细胞（WBC）和管型（CAST）检测的敏感性。方法对1 054例患者的尿液分别用UF-1000i、URISys-2400全自动干化学分析仪（干化学法）及Diasys R/S2005定量分析工作站（镜检法）3种方法进行分析,并比较3种方法对RBC、WBC、CAST的检测敏感性。结果 UF-1000i检测RBC、WBC、CAST的阳性率分别为20.6%、20.3%、6.7%;干化学法检测出RBC、WBC的阳性率分别为24.5%、17.9%;镜检法检出RBC、WBC、CAST的阳性率分别为16.9%、20.5%、2.2%。3种方法RBC、CAST的检出率差异有统计学意义（P〈0.01）,WBC的检出率差异无统计学意义（P〉0.05）。结论 UF-1000i不能完全取代尿沉渣镜检,建议3种方法联合应用以减少检验误差,提高尿液分析质量。     

自动化尿液干化学和有形成分分析复检规则的制定和应用

目的 结合尿液干化学分析(简称干化学)和有形成分分析(简称尿流式),制定自动化尿常规分析的复检规则.方法 收集北京协和医院2008年11月至2010年10月1 714份中段尿标本,其中1 300份用于建立复检规则,214份用于验证所建立的规则,另外200份健康体检者的标本用于建立UF-1000i尿流式分析仪的参考范围.所有标本通过Siemens Bayer Clinitek 500型干化学分析仪、Sysmex UF-1000i尿流式分析仪及尿沉渣显微镜(简称尿沉渣)检测,进行RBC、WBC、PRO及CAST分析.针对自动化尿常规的不同检测方法,设计了4种复检方案:(1)方案1:单独使用干化学时RBC、WBC和PRO任何一项参数出现阳性者;(2)方案2:单独使用尿流式时RBC、WBC和CAST任何一项参数超出参考范围上限者;(3)方案3:联合使用2种方法检出的WBC结果不相符合,即同一项参数在一台仪器上检测为阳性或超出参考范围上限,在另一台仪器上检测为阴性或不超出参考范围上限,而RBC、PRO(对应尿流式的CAST)中任何一项参数在任何一台仪器上出现阳性或超出参考范围上限者;(4)方案4:联合使用2种方法检出的RBC、WBC、PRO(对应尿流式的CAST)结果不相符合者.通过Sysmex Laboman UriAccess Ver 3.0软件进行统计分析,建立不同检测方法的自动化尿常规分析的复检规则.结果 UF-1000i尿流式分析仪的参考范围:RBC为0～7.5个/μl(男)、0～15.9个/μl(女);WBC为0～11.6个/μl(男)、0～12.7个/μl(女);上皮细胞为0～6.5个/μl(男)、0～21.4个/μl(女);CAST为0～1.3个/μl.尿沉渣显微镜镜检结果显示,1 300份用于建立复检规则的标本中,阳性标本占47.46%(617/1 300),阴性标本占52.54%(683/1 300).在阳性标本中,RBC阳性者最多,占60.13%(371/617),其次为CAST阳性者,占8.43%(52/617).4种方案的假阴性率(漏诊率)分别为8.38%(109/1 300)、4.69%(61/1 300)、0.62%(8/1 300)和0.54%(7/1 300);复检率分别为47.85%(622/1 300)、59.38%(772/1 300)、72.85%(947/1 300)及52.23%(679/1 300);方案4的漏诊病例中无1例血肌酐结果异常.采用214份临床标本对所建立的复检规则(方案4)进行验证,其漏诊率为0,复检率为53.74%(115/214).结论 方案4的漏诊率最低,复检率也较低,且无严重肾功能异常者漏诊,是理想的复检方案.

Abstract：

Objective To integrate urine strip chemistry analysis with urine sedimental analysis and set up the criteria for urine microscopy review following automated urine analysis.Methods A total of 1 714 urine samples were collected from Peking Union Medical College Hospital from November 2008 to October 2010.Out of 1 714 samples, 1 300 samples were used for the establishment of review criteria, and 214 samples were used for criteria verification.The other 200 samples from healthy donors were used to set up the normal reference range of fully automated urine sedimental analyzer UF-1000i.RBC,WBC,PRO and CAST in all the samples were measured by Siemens Bayer Clinitek 500 urine strip chemistry analyzer, Sysmex UF-1000i urine sedimental analyzer and microscopic examination.Based on the different laboratory automation in urine analysis, four microscopic review protocols were defined: (1) Protocol 1: based on chemistry results only, microscopy review was performed when any of WBC, RBC and PRO was positive; (2) Protocol 2: based on fully automated sedimental analyzer only,microscopy review was performed when any of WBC, RBC and CAST was over the upper limit of the reference range; (3) Protocol 3: All the results of urine chemistry analyzer and sedimental analyzer were integrated.If two WBC results were different between two systems (in one system WBC was positive or over the upper limit of the reference range but in another system WBC was negative or within the reference range), and any of RBC, PRO/CAST was positive or over the upper limit, microscopic review was performed; (4) Protocol 4: if any of WBC, RBC, PRO/CAST was different between two systems, microscopic review was performed.Review criteria were performed with Sysmex Laboman UriAccess 3.0 software.Results The reference ranges of UF-1000i parameters were RBC 0-7.5/μl (male), 0-15.9/μl (female); WBC 0-11.6/μl (male), 0-12.7/μl (female); Epithelial cell were 0-6.5/μl (male), 0-21.4/μl (female); CAST 0-1.3/μl.The results of microscopic examination revealed that positive samples were 47.46% (617/1 300) and negative samples were 52.54% (683/1 300). Among positive samples, majority showed the presence of RBC (60.13%,371/617), followed by CAST (8.43%,52/617).The false negative rates of four protocols were 8.38% (109/1 300), 4.69% (61/1 300), 0.62% (8/1 300) and 0.54% (7/1 300), respectively.The review rates were 47.85% (622/1 300), 59.38% (772/1 300), 72.85% (947/1 300) and 52.23% (679/1 300), respectively.Although there were false negative cases in protocol 4, all the patients had normal serum creatine level.In those 214 patients for verification, the false negative rate using protocol 4 was zero, the review rates were 53.74% (115/214).Conclusions Protocol 4 shows lest false negative rate and lower review rate.Importantly, there was no patients with serious renal function abnormality missed using protocol 4.Therefore, protocol 4 is an ideal criteria for microscopy review following automated urine analysis.     

Sysmex UF-1000i全自动尿沉渣分析仪的性能分析及临床应用

目的探讨Sysmex UF-1000i全自动尿沉渣分析仪的临床应用情况。方法分别采用UF-1000i尿沉渣分析仪和显微镜检查法对2 000例临床标本进行检测,对比2种方法的结果,并分析UF-1000i尿沉渣分析仪产生假阳性的原因。结果检测白细胞(WBC),红细胞(RBC),管型和小圆上皮细胞的敏感性分别为99.2%,99.3%,94.7%和95.1%;检测上述成分的假阳性率分别为5.8%、6.1%、10.4%和4.6%;粘液丝、结晶、细菌、酵母菌、小圆上皮、脂肪滴和卵磷脂小体可能影响到UF-1000i对尿有形成分的检测。结论 Sysmex UF-1000i可以有效的检测尿液中的有形成分,当尿液中上述干扰成分呈阳性或增多时,显微镜镜检是十分重要的。     

脑脊液细胞标准化检测方法的临床研究

目的探讨一种可以替代脑脊液细胞手工计数法实现标准化操作的可行性方法。方法应用iQ200工作站对100例脑脊液患者进行白细胞和红细胞的检测，并与显微镜计数板法相比较。结果细胞检测范围在0～3200个／微升时，两种方法比较差异无统计学意义（P〉0．05），在3300～12000个／微升细胞时比较差异有统计学意义（P〈0．05）；两种方法均有较高的精密度，iQ200工作站法略高于计数板法；计数结果呈高度相关，红细胞相关系数r=0．9985，白细胞相关系数r=0．9993；iQ200工作站还可以通过影像分析技术对细胞进行回顾性甄别。结论iQ200工作站在一定范围内用于脑脊液细胞计数有良好的精密度和准确性，适用于脑脊液细胞计数，可达到检测的标准化和规范化。     

The role of automated urine particle flow cytometry in clinical practice

Urine particle flow cytometers (UFC) have improved count precision and accuracy compared to visual microscopy and offer significant labor saving. The absence of an internationally recognized reference measurement procedure, however, is a serious drawback to their validation. Chamber counting by phase contrast microscopy of supravitally-stained uncentrifuged urine is considered the best candidate for reference. The UF-100 (Sysmex Corporation, Japan) identifies RBC, WBC, squamous epithelial cells, transitional epithelial and renal tubular cells (SRC), bacteria, hyaline and inclusional casts, yeast-like cells, crystals and spermatozoa, using argon laser flow cytometry. Evaluations have established acceptable linearity over useful working ranges, with an imprecision that is consistently and significantly less than microscopy, and with negligible carry-over. Comparisons of UFC with chamber counts, quantitative urine microscopy, sediment counts, test strips, bacterial culture and urine density are reviewed. Clinical studies include diagnosis and monitoring of urinary tract infection; localization of the sites of hematuria; and diagnosis, monitoring and exclusion of renal disease. The most popular approach is to combine test strips with UFC for primary screening either always by both methods or by using test strips for analytes unrelated to particles analyzed by UFC. Expert systems now exist combining both test modalities based on user definable decision rules. The implementation of such a strategy significantly reduces microscopy review and saves time and expense without diminishing clinical utility.     

两台Sysmex UF-1000i全自动尿沉渣分析仪检测结果的比对研究

目的探讨实验室内不同全自动尿沉渣分析仪检测结果之间的差异是否在允许范围之内,以提高检验结果的准确性、一致性、可比性。方法以Sysmex UF-1000i全自动尿沉渣分析仪（LJ-25）作为标准仪器,在两台全自动尿沉渣分析仪均处于正常状态下,双份检测新鲜尿液,获取红细胞计数（RBC/μL）、白细胞计数（WBC/μL）、上皮细胞计数（EC/μL）、管型计数（CAST/μL）及细菌计数（BACT/μL）,将检测结果进行通过率计算及比对试验,并参照Sysmex公司的仪器说明书提供的标准作为各参数的允许范围进行评估。结果两仪器检测结果显示,RBC、WBC、EC、CAST及BACT比对通过率88.09%、88.09%、92.86%、52.38%、35.71%;线性相关系数（r）为0.998、0.997、0.993、0.417、0.971,CAST、BACT结果比较差异无统计学意义（P〉0.05）,RBC、WBC、EC结果比较差异有统计学意义（P〈0.05）。结论临床实验室应加强对所有检测项目结果的可靠性进行验证,做好尿沉渣分析仪室内质控的同时定期进行仪器比对试验,以保证不同仪器上的检测结果具有可比性、准确性、一致性、持续性的质量保证。     

UF-100在尿液检测中的应用价值

目的 评价UF-100全自动尿液细胞分析仪在实际工作中的应用。方法 对474例尿液标本同时进行干化学分析、尿沉渣镜检和UF-100检查,对比分析。结果 在尿液有形成分的检测方面,UF-100法与手工镜检法结果相近,符合性好,UF-100法与干化学检验结果存在差异。结论 UF-100在一定范围内能对尿液中的有形成分进行准确计数,定量报告,并能提示RBC的相关信息,有效地提高了尿常规的检验质量。     

Roche Cobas 6500全自动尿液分析仪与其他系统的性能比较及效率评估

目的观察罗氏Roche Cobas 6500全自动尿液分析流水线与Arkray AX-4030、Urisys 2400、Sysmex UF-1000i尿液干化学、尿液有形成分检测结果之间的可比性。方法分别对Cobas u601与Urisys 2400尿液干化学检测性能,Cobas u601与Arkray AX-4030、Urisys 2400抗维生素C的干扰能力评估;比较Cobas u701与KOVA人工镜检计数在尿液有形成分检测差异,比较Cobas u701和Sysmex UF-1000i检测透明管型(Hya)、尿细菌计数(Bac)、病理管型(Pat)及结晶(Cry)的结果差异;比较Cobas 6500系统与Arkray AX-4030、Sysmex UF-1000i联合检测时的周转时间(TAT)差异。结果 Cobas u601与Urisys 2400尿液干化学9个参数检测结果的比对符合率均超过90%;Cobas 6500携带污染率为0%,未发现携带污染且未受到维生素C的干扰。在尿液有形成分检测中,Cobas 6500与镜检标准对照,阴阳性符合率均较高。结论 Cobas u601、Cobas u701与其他仪器检测结果的符合率较高,在检测重复性、携带污染率、抗维生素C干扰方面较好,Cobas 6500尿液分析仪能提高检验科日常TAT。     

Automated flow cytometric analysis of cerebrospinal fluid

BACKGROUND: Recently, the UF-100 (Sysmex Corporation) flow cytometer was developed to automate urinalysis. We evaluated the use of flow cytometry in the analysis of cerebrospinal fluid (CSF). METHODS: UF-100 data were correlated with microscopy and biochemical data for 256 CSF samples. Microbiological analysis was performed in 144 suspected cases of meningitis. RESULTS: Good agreement was obtained between UF-100 and microscopy data for erythrocytes (r = 0.919) and leukocytes (r = 0.886). In some cases, however, incorrect classification of lymphocytes by the UF-100 led to underestimation of the leukocyte count. UF-100 bacterial count positively correlated (P < 0.001) with UF-100 leukocyte count (r = 0.666), CSF total protein (r = 0.754), and CSF lactate concentrations (r = 0.641), and negatively correlated with CSF glucose concentration (r = -0.405; P < 0.001). UF-100 bacterial counts were unreliable in hemorrhagic samples and in samples collected by ventricular drainage where interference by blood platelets and cell debris was observed. Another major problem was the UF-100 "bacterial" background signal in sterile CSF samples. Cryptococcus neoformans yeast cells and cholesterol crystals in craniopharyngioma were detected by the flow cytometer. CONCLUSIONS: Flow cytometry of CSF with the UF-100 offers a rapid and reliable leukocytes and erythrocyte count. Additional settings offered by the instrument may be useful in the diagnosis of neurological disorders.     

Automation of urine sediment examination: a comparison of the Sysmex UF-100 automated flow cytometer with routine manual diagnosis (microscopy, test strips, and bacterial culture).

Urine specimens from 438 patients were examined with the UF-100 flow cytometer (Sysmex TOA Medical Electronics (Europe) GmbH, Hamburg, Germany) and by manual microscopy and test strips. One hundred and forty-two of these were also examined bacteriologically. The measurements with the UF-100 were performed on native urine without prior centrifugation. Intraassay imprecision, CV of 1.3% (547/microliter) to 8.5% (24/microliter) for erythrocytes and CV of 2.4% (218/microliter) to 5.6% (10/microliter) for leukocytes, are similar to those usual in clinical chemistry, and are very much better than those seen in manual microscopy of sediment. In routine use, overloading the flow cytometer by an excessive concentration of particles was observed in 9% of specimens. Such specimens should be checked visually. The UF-100 is distinctly more sensitive than manual microscopy for determining leukocytes, erythrocytes, epithelial cells and bacteria. Reference ranges were estimated from the results obtained. These enabled the UF-100 to replace routine manual diagnostic methods. Although the sensitivity is improved over manual microscopy of sediment, it is always necessary to perform parallel test strip examination when determining erythrocytes in order to detect haemolysis. In our opinion the Sysmex UF-100 is a suitable replacement for manual microscopy of urine sediment. In addition it offers an opportunity to improve standardization of basic urinalysis.     

UF-500i与IQ200尿沉渣分析仪检测管型的比较和评价

目的比较UF-500i与IQ200尿沉渣分析仪在检测管型中的敏感度、特异度和影响因素。方法采用UF-500i、IQ200尿沉渣分析仪和离心沉淀显微镜法分别检测门诊肾病患者晨尿标本,以人工镜检法作为标准对两种仪器敏感度、特异度进行分析。结果480份晨尿标本中,UF-500i尿沉渣分析仪敏感度为97．1％（68／70）,特异度为76．6％（314／410）;IQ200尿沉渣分析仪人工修饰前后敏感度分别为91．4％、100％（64／70,70／70）,特异度为70．5％／98．3％（289／410,403／410）。结论UF-500i与IQ200尿沉渣分析仪具有较高的管型检测灵敏度,但假阳性率高,均需人工复核以提高准确性。     

菌尿对两种全自动尿沉渣分析仪检测尿红细胞的影响

目的探讨不同菌种、不同浓度细菌对Sysmex UF-1000i和IRISIQ-200全自动尿沉渣分析仪检测尿红细胞的影响,比较两种全自动尿沉渣分析仪检测尿红细胞时的抗细菌干扰能力。方法不同浓度的红细胞尿液加入不同菌种、不同浓度的细菌后分别用Sysmex UF-1000i和IRISIQ-200进行检测,比较加入细菌前后检测结果的差异。结果铜绿假单胞菌、金黄色葡萄球菌和大肠埃希菌对Sysmex UF-1000i和IRISIQ-200检测尿中红细胞没有显著影响,白色念珠菌和热带念珠菌可干扰Sysmex UF-1000i和IRISIQ-200对尿中红细胞的检测,但两种仪器受干扰程度有差异。结论 Sysmex UF-1000i和IRISIQ-200对尿红细胞检测在一定程度上可受到真菌的影响,结果报告应结合干化学检测和手工显微镜检查。     

Sysmex UF-1000i全自动尿沉渣分析仪的性能分析及临床应用

目的探讨Sysmex UF-1000i全自动尿沉渣分析仪的临床应用情况。方法分别采用UF-1000i尿沉渣分析仪和显微镜检查法对2 000例临床标本进行检测,对比2种方法的结果,并分析UF-1000i尿沉渣分析仪产生假阳性的原因。结果检测白细胞（WBC）,红细胞（RBC）,管型和小圆上皮细胞的敏感性分别为99.2%,99.3%,94.7%和95.1%;检测上述成分的假阳性率分别为5.8%、6.1%、10.4%和4.6%;粘液丝、结晶、细菌、酵母菌、小圆上皮、脂肪滴和卵磷脂小体可能影响到UF-1000i对尿有形成分的检测。结论 Sysmex UF-1000i可以有效的检测尿液中的有形成分,当尿液中上述干扰成分呈阳性或增多时,显微镜镜检是十分重要的。     

IQ-200与UF-100全自动尿沉渣分析仪管型检测对比分析

目的对比分析IQ-200全自动尿沉渣分析仪与UF-100全自动尿沉渣分析仪管型检测的灵敏度、特异性以及影响因素。方法选择320例干化学法尿蛋白(+)及以上的住院患者晨尿标本,分别用IQ-200全自动尿沉渣分析仪、UF-100全自动尿沉渣分析仪及显微镜检查。结果 IQ-200和UF-100全自动尿沉渣分析仪对管型检测的检出率不一致,IQ-200全自动尿沉渣分析仪对管型检出的灵敏度为44.2%,特异度为88.4%;UF-100全自动尿沉渣分析仪对管型检出的灵敏度为88.5%,特异度为33.2%。结论 IQ-200全自动尿沉渣分析仪和UF-100全自动尿沉渣分析仪管型检测相比,特异度更高,灵敏度更低,2台仪器对管型的检测都还不能完全代替显微镜镜检。