UF-1000i全自动尿有形成分分析仪对尿路感染的诊断价值

目的 研究UF-1000i尿有形成分分析仪对诊断尿路感染的价值.方法 采用UF-1000i尿有形成分分析仪检测150份临床尿液标本的白细胞、酵母样真菌及细菌计数,将这3项检测结果结合起来判断是否具有尿路感染(UTI)信息,并记录下具有UTI信息标本的散点图.同时将尿标本进行细菌培养和鉴定,将UF-1000i尿有形成分分析仪的检测结果与之做比较分析.以临床诊断尿路感染的标准作为诊断UTI的金标准,计算UF-1000i尿有形成分分析仪对诊断UTI的敏感度、特异度等评估参数,以及细菌散点图分布与尿细菌培养结果、临床诊断的符合情况.结果 通过对146份标本的比较分析,UF-1000i尿有形成分分析仪阳性检出率为32.9%(48/146),细菌培养阳性检出率为28.8%(42/146),2种检测方法之间差异无统计学意义(χ2=1.79,P0.05),且一致性较好(Kappa=0.775 6).UF-1000i尿有形成分分析仪判断筛选UTI信息的敏感度为76.0%(38/50),特异度为89.6%(86/96),阳性预测值为79.2%(38/48),阴性预测值为87.8%(86/98);UF-1000i尿有形成分分析仪测得细菌的球杆菌分布与细菌培养结果基本一致.结论 UF-1000i尿有形成分分析仪的"YTU信息"研究参数对诊断尿路感染具有重要价值.     

UF-1000i尿有形成分分析仪在尿路感染筛查中的应用评价

目的评价UF-1000i尿流式有形成分分析仪在尿路感染（UTI）筛查中的应用价值。方法应用UF—1000i尿流式有形成分分析仪检测148例疑似uTI患者中段尿标本中的细菌（BACT）数和白细胞（WBC）数,以定量尿细菌培养作为诊断UTI金标准,应用受试者工作特征（ROC）曲线确立阳性判断标准,评价UF-1000i尿流式有形成分分析仪诊断UTI的敏感性、特异性、阳性预测值、阴性预测值和准确性。结果UF—1000i尿有形成分分析仪BACT和WBC诊断UTI的cut—off值分别为325个／汕和48个／μL,其诊断UTI的敏感性、特异性、阳性预测值、阴性预测值、准确性分别是：78．3％、92．2％、81．8％、90．4％、87．8％和73．9％、81．4％、64．2％、87．4％、79．1％。UF—1000i联合诊断uTI的敏感性、特异性、阳性预测值、阴性预测值和准确性分别95．7％、70．6％、59．5％、97．3％、78．4％。结论UF．1000i尿有形成分分析仪可作为UTI的快速筛查工具。     

IQ200尿沉渣仪与尿干化学仪联合应用在尿路感染诊断中的价值

目的探讨联合应用IQ200尿沉渣分析仪和URIT500B干化学尿液分析仪在尿路感染(UTI)诊断中的价值。方法收集209例疑似尿路感染的门诊及住院患者的中段尿标本,先进行尿定量病原菌培养,再用干化学检测白细胞酯酶(LEU)、亚硝酸盐(NIT),尿沉渣检测白细胞(WBC)、细菌(BACT)、小微粒(ASP)、酵母菌(YST)。以尿培养结果为金标准,评价单独或联合应用尿干化学和尿沉渣分析对UTI诊断的敏感度、特异度、阳性预测值、阴性预测值、准确度。结果 64例UTI患者中,尿定量病原菌培养的检出率为78.1%(50/64),尿干化学的LEU和NIT同时阳性的检出率为25.0%(16/64),两种方法检出率差异有统计学意义(χ2=56.23,P<0.05);IQ200的BACT、ASP、YST和WBC中任意1项为阳性诊断UTI的检出率为90.6%(58/64),高于尿定量病原菌培养,差异有统计学意义(χ2=6.47,P<0.05)。IQ200和干化学的联合参数BACT、ASP、YST、WBC、LEU和NIT中任意1项为阳性诊断UTI的检出率为93.8%(60/64),高于尿定量病原菌培养,差异有统计学意义(χ2=9.07,P<0.05)。结论 IQ200尿沉渣仪及尿干化学仪联合检测在早期尿路感染筛查诊断中发挥重要作用;同时对尿病原菌培养阴性的UTI患者的明确诊断具有重要价值。     

UF-1000i尿有形成分分析仪对尿路感染早期诊断的价值

目的 探讨UF-1000i尿有形成分分析仪对尿路感染的诊断价值.方法 采用UF-1000i尿有形成分分析仪检测110份尿液标本,记录其中的白细胞、细菌计数及尿路感染(urinary tract infection,UTI)信息,同时将尿标本进行细菌培养及鉴定,并将结果与UF-1000i尿有形成分分析仪结果相比较判断其符合情况.结果 通过对104份尿液标本的比较分析,UF-1000i尿有形成分分析仪的阳性率为24.04%(25/104),细菌培养阳性率为21.15%(22/104),两种检测方法间差异无统计学意义(χ2=0.09,P>0.05).将上述110份标本以UF-1000i分析仪检测细菌数,将尿液细菌培养结果作为"金标准",与UF-1000i分析仪检测细菌定量值,绘制ROC曲线,确定UF-1000i分析仪测定细菌定量临界值为≥4 920.1/μl.此时,灵敏度为81.81%,特异度为91.46%.结论 UF-1000i尿有形成分分析仪的"UTI信息"对诊断尿路感染具有重要价值;细菌沉渣定量为≥4 920.1/μl,时,可为临床诊断泌尿道感染提供有力依据.     

全自动尿液有形成分分析仪细菌检测对尿路感染诊断价值的探讨

目的探讨UF-1000i全自动尿液有形成分分析仪细菌信息对临床尿路感染(UTI)诊断的应用价值。方法收集216例临床疑似尿路感染患者尿液样本,分别采用UF-1000i全自动尿液有形成分分析仪和尿液细菌培养及鉴定,比较两者结果。结果 216例临床诊断为尿路感染患者的UF-1000i全自动尿液有形成分分析仪细菌数量检测阳性率为38.0%(82/216),细菌培养阳性率为31.0%(67/216),两种方法检测结果经统计无显著性差异(P0.05)。UF-1000i全自动尿液有形成分分析仪细菌检测诊断尿路感染的敏感度为69.0%、特异性为82.9%、假阳性率为17.1%、假阴性率为31.0%、阳性预测值为73.2%、阴性预测值为79.8%、诊断符合率为77.3%。结论 UF-1000i全自动尿液有形成分分析仪检测简易、快速,细菌检测有助于及时辅助尿路感染临床诊断,可作为临床筛查的手段。     

尿流式有形成分及干化学分析在尿路感染诊断中的应用评价

Objective To evaluate the clinical application of automated urine formed elements analyzer and/or urine dipstick analyzer for examination of urinary formed elements in screening urinary tract infection (UTI). Methods 148 fresh midstream clear-catch urine samples from the UTI patients and 284 fresh midstream clear-catch urine samples from non-UTI subjects were selected. Bacteria culture was performed for bacterial colony counting and identification. Bacteria counts ( BACT), yeast-like fungus and WBC were performed by UF-looOi automated urine formed elements analyzer. Leukocyte esterase test (LEU) and nitrite test (NIT) were performed by URISYS 2400 urine dipstick analyzer. We evaluated data obtained from urine dipstick analyzer, UF-1000i and combination of UF-1000i with urine dipstick analyzer and the results was compared with those obtained from quantitative bacterial culture. Then we evaluated the sensibility, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy. Results Among the 148 patients with UTI, the positive rate of the quantitative bacterial culture was 73.6% (109/148), the positive rate of LEU and NIT detected by dipstick test 26. 4% (39/148).There was significantly statistical difference between bacterial culture and strip test(χ2 = 55.68 ,P < 0. 05 ). The positive rate of urine flow cytometry by UF-1000i with either positive of BACT and WBC was 91.2%(135/148), which was higher than the positive rate of the quantitative bacterial culture. There was significant difference between two methods (χ2 = 14. 70, P < 0. 05 ). The positive rate of anyone positive among BACT, WBC, LEU and NIT was 94. 6% (140/148) when detected with combination of dipstick test and UF-1000i, which was higher than the positive rate of the quantitative bacterial culture. And there was significant difference between two methods (χ2 = 20. 45, P < 0. 05 ). The sensitivity of dipstick test was low (26. 4% ,39/148 ), and specificity was high ( 99. 3%, 282/284 ) . The sensitivity, specificity, positive predictive value, negative predictive value of BACT detected by UF-1000i in diagnosing urinary tract infection were 92. 6% ( 137/148 ), 39. 8% ( 113/284 ). 44. 5% ( 137/308 ) and 91.1% ( 113/124 ), respectively. If the dipstick test was combined with UF-1000i, the sensitivity, negative predictive value, specificity, positive predictive value and accuracy were 98.0% ( 145/148 ), 97.1% ( 100/103 ). 35.2% (100/284) ,44. 1% (145/329) and 56. 7% (245/432), respectively. Conclusions The combination of urine dipstick test and automated urine formed elements analyzer UF-1000i plays an important role in early diagnosis of UTI. And it has significant value in diagnosis of UTI, especially for the patients with negative bacterial cultures of urine sample.     

尿流式有形成分及干化学分析在尿路感染诊断中的应用评价

Objective To evaluate the clinical application of automated urine formed elements analyzer and/or urine dipstick analyzer for examination of urinary formed elements in screening urinary tract infection (UTI). Methods 148 fresh midstream clear-catch urine samples from the UTI patients and 284 fresh midstream clear-catch urine samples from non-UTI subjects were selected. Bacteria culture was performed for bacterial colony counting and identification. Bacteria counts ( BACT), yeast-like fungus and WBC were performed by UF-looOi automated urine formed elements analyzer. Leukocyte esterase test (LEU) and nitrite test (NIT) were performed by URISYS 2400 urine dipstick analyzer. We evaluated data obtained from urine dipstick analyzer, UF-1000i and combination of UF-1000i with urine dipstick analyzer and the results was compared with those obtained from quantitative bacterial culture. Then we evaluated the sensibility, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy. Results Among the 148 patients with UTI, the positive rate of the quantitative bacterial culture was 73.6% (109/148), the positive rate of LEU and NIT detected by dipstick test 26. 4% (39/148).There was significantly statistical difference between bacterial culture and strip test(χ2 = 55.68 ,P < 0. 05 ). The positive rate of urine flow cytometry by UF-1000i with either positive of BACT and WBC was 91.2%(135/148), which was higher than the positive rate of the quantitative bacterial culture. There was significant difference between two methods (χ2 = 14. 70, P < 0. 05 ). The positive rate of anyone positive among BACT, WBC, LEU and NIT was 94. 6% (140/148) when detected with combination of dipstick test and UF-1000i, which was higher than the positive rate of the quantitative bacterial culture. And there was significant difference between two methods (χ2 = 20. 45, P < 0. 05 ). The sensitivity of dipstick test was low (26. 4% ,39/148 ), and specificity was high ( 99. 3%, 282/284 ) . The sensitivity, specificity, positive predictive value, negative predictive value of BACT detected by UF-1000i in diagnosing urinary tract infection were 92. 6% ( 137/148 ), 39. 8% ( 113/284 ). 44. 5% ( 137/308 ) and 91.1% ( 113/124 ), respectively. If the dipstick test was combined with UF-1000i, the sensitivity, negative predictive value, specificity, positive predictive value and accuracy were 98.0% ( 145/148 ), 97.1% ( 100/103 ). 35.2% (100/284) ,44. 1% (145/329) and 56. 7% (245/432), respectively. Conclusions The combination of urine dipstick test and automated urine formed elements analyzer UF-1000i plays an important role in early diagnosis of UTI. And it has significant value in diagnosis of UTI, especially for the patients with negative bacterial cultures of urine sample.     

尿流式有形成分及干化学分析在尿路感染诊断中的应用评价

Objective To evaluate the clinical application of automated urine formed elements analyzer and/or urine dipstick analyzer for examination of urinary formed elements in screening urinary tract infection (UTI). Methods 148 fresh midstream clear-catch urine samples from the UTI patients and 284 fresh midstream clear-catch urine samples from non-UTI subjects were selected. Bacteria culture was performed for bacterial colony counting and identification. Bacteria counts ( BACT), yeast-like fungus and WBC were performed by UF-looOi automated urine formed elements analyzer. Leukocyte esterase test (LEU) and nitrite test (NIT) were performed by URISYS 2400 urine dipstick analyzer. We evaluated data obtained from urine dipstick analyzer, UF-1000i and combination of UF-1000i with urine dipstick analyzer and the results was compared with those obtained from quantitative bacterial culture. Then we evaluated the sensibility, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy. Results Among the 148 patients with UTI, the positive rate of the quantitative bacterial culture was 73.6% (109/148), the positive rate of LEU and NIT detected by dipstick test 26. 4% (39/148).There was significantly statistical difference between bacterial culture and strip test(χ2 = 55.68 ,P < 0. 05 ). The positive rate of urine flow cytometry by UF-1000i with either positive of BACT and WBC was 91.2%(135/148), which was higher than the positive rate of the quantitative bacterial culture. There was significant difference between two methods (χ2 = 14. 70, P < 0. 05 ). The positive rate of anyone positive among BACT, WBC, LEU and NIT was 94. 6% (140/148) when detected with combination of dipstick test and UF-1000i, which was higher than the positive rate of the quantitative bacterial culture. And there was significant difference between two methods (χ2 = 20. 45, P < 0. 05 ). The sensitivity of dipstick test was low (26. 4% ,39/148 ), and specificity was high ( 99. 3%, 282/284 ) . The sensitivity, specificity, positive predictive value, negative predictive value of BACT detected by UF-1000i in diagnosing urinary tract infection were 92. 6% ( 137/148 ), 39. 8% ( 113/284 ). 44. 5% ( 137/308 ) and 91.1% ( 113/124 ), respectively. If the dipstick test was combined with UF-1000i, the sensitivity, negative predictive value, specificity, positive predictive value and accuracy were 98.0% ( 145/148 ), 97.1% ( 100/103 ). 35.2% (100/284) ,44. 1% (145/329) and 56. 7% (245/432), respectively. Conclusions The combination of urine dipstick test and automated urine formed elements analyzer UF-1000i plays an important role in early diagnosis of UTI. And it has significant value in diagnosis of UTI, especially for the patients with negative bacterial cultures of urine sample.     

尿流式有形成分及干化学分析在尿路感染诊断中的应用评价

Objective To evaluate the clinical application of automated urine formed elements analyzer and/or urine dipstick analyzer for examination of urinary formed elements in screening urinary tract infection (UTI). Methods 148 fresh midstream clear-catch urine samples from the UTI patients and 284 fresh midstream clear-catch urine samples from non-UTI subjects were selected. Bacteria culture was performed for bacterial colony counting and identification. Bacteria counts ( BACT), yeast-like fungus and WBC were performed by UF-looOi automated urine formed elements analyzer. Leukocyte esterase test (LEU) and nitrite test (NIT) were performed by URISYS 2400 urine dipstick analyzer. We evaluated data obtained from urine dipstick analyzer, UF-1000i and combination of UF-1000i with urine dipstick analyzer and the results was compared with those obtained from quantitative bacterial culture. Then we evaluated the sensibility, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy. Results Among the 148 patients with UTI, the positive rate of the quantitative bacterial culture was 73.6% (109/148), the positive rate of LEU and NIT detected by dipstick test 26. 4% (39/148).There was significantly statistical difference between bacterial culture and strip test(χ2 = 55.68 ,P < 0. 05 ). The positive rate of urine flow cytometry by UF-1000i with either positive of BACT and WBC was 91.2%(135/148), which was higher than the positive rate of the quantitative bacterial culture. There was significant difference between two methods (χ2 = 14. 70, P < 0. 05 ). The positive rate of anyone positive among BACT, WBC, LEU and NIT was 94. 6% (140/148) when detected with combination of dipstick test and UF-1000i, which was higher than the positive rate of the quantitative bacterial culture. And there was significant difference between two methods (χ2 = 20. 45, P < 0. 05 ). The sensitivity of dipstick test was low (26. 4% ,39/148 ), and specificity was high ( 99. 3%, 282/284 ) . The sensitivity, specificity, positive predictive value, negative predictive value of BACT detected by UF-1000i in diagnosing urinary tract infection were 92. 6% ( 137/148 ), 39. 8% ( 113/284 ). 44. 5% ( 137/308 ) and 91.1% ( 113/124 ), respectively. If the dipstick test was combined with UF-1000i, the sensitivity, negative predictive value, specificity, positive predictive value and accuracy were 98.0% ( 145/148 ), 97.1% ( 100/103 ). 35.2% (100/284) ,44. 1% (145/329) and 56. 7% (245/432), respectively. Conclusions The combination of urine dipstick test and automated urine formed elements analyzer UF-1000i plays an important role in early diagnosis of UTI. And it has significant value in diagnosis of UTI, especially for the patients with negative bacterial cultures of urine sample.     

尿流式有形成分及干化学分析在尿路感染诊断中的应用评价

Objective To evaluate the clinical application of automated urine formed elements analyzer and/or urine dipstick analyzer for examination of urinary formed elements in screening urinary tract infection (UTI). Methods 148 fresh midstream clear-catch urine samples from the UTI patients and 284 fresh midstream clear-catch urine samples from non-UTI subjects were selected. Bacteria culture was performed for bacterial colony counting and identification. Bacteria counts ( BACT), yeast-like fungus and WBC were performed by UF-looOi automated urine formed elements analyzer. Leukocyte esterase test (LEU) and nitrite test (NIT) were performed by URISYS 2400 urine dipstick analyzer. We evaluated data obtained from urine dipstick analyzer, UF-1000i and combination of UF-1000i with urine dipstick analyzer and the results was compared with those obtained from quantitative bacterial culture. Then we evaluated the sensibility, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy. Results Among the 148 patients with UTI, the positive rate of the quantitative bacterial culture was 73.6% (109/148), the positive rate of LEU and NIT detected by dipstick test 26. 4% (39/148).There was significantly statistical difference between bacterial culture and strip test(χ2 = 55.68 ,P < 0. 05 ). The positive rate of urine flow cytometry by UF-1000i with either positive of BACT and WBC was 91.2%(135/148), which was higher than the positive rate of the quantitative bacterial culture. There was significant difference between two methods (χ2 = 14. 70, P < 0. 05 ). The positive rate of anyone positive among BACT, WBC, LEU and NIT was 94. 6% (140/148) when detected with combination of dipstick test and UF-1000i, which was higher than the positive rate of the quantitative bacterial culture. And there was significant difference between two methods (χ2 = 20. 45, P < 0. 05 ). The sensitivity of dipstick test was low (26. 4% ,39/148 ), and specificity was high ( 99. 3%, 282/284 ) . The sensitivity, specificity, positive predictive value, negative predictive value of BACT detected by UF-1000i in diagnosing urinary tract infection were 92. 6% ( 137/148 ), 39. 8% ( 113/284 ). 44. 5% ( 137/308 ) and 91.1% ( 113/124 ), respectively. If the dipstick test was combined with UF-1000i, the sensitivity, negative predictive value, specificity, positive predictive value and accuracy were 98.0% ( 145/148 ), 97.1% ( 100/103 ). 35.2% (100/284) ,44. 1% (145/329) and 56. 7% (245/432), respectively. Conclusions The combination of urine dipstick test and automated urine formed elements analyzer UF-1000i plays an important role in early diagnosis of UTI. And it has significant value in diagnosis of UTI, especially for the patients with negative bacterial cultures of urine sample.     

Combination of UC-3500 and UF-5000 as a quick and effective method to exclude bacterial urinary tract infection

BackgroundOur study aims to evaluate the performance of the combination of Sysmex urine dry chemistry analyzer UC-3500 and urine particle analyzer UF-5000 in screening bacterial urinary tract infection (UTI).MethodsWe analyzed 2000 urine specimens from patients with suspected UTI by using a urine dry chemistry analyzer (UC-3500) and a fully automated sediment analyzer (UF-5000). After being tested by the instrument, all specimens were sent to our clinical microbiology laboratory for culture. In addition, 600 urine specimens were selected to evaluate the accuracy of the six screening strategies established in this study.ResultsThe consistency of UF-5000 bacterial classification and bacterial culture was fair (Kappa = 0.339). The counts of WBC and BACT elevated with sequential group designs (P < 0.001). The cut-off value of WBC was 32.20/μL for males (AUC, 0.942, 95%CI, 0.930–0.955) and 39.15/μL for females (AUC, 0.931, 95%CI, 0.914–0.948). The sensitivity and specificity of WBC were relatively higher than those of BACT. Strategy④ and Strategy⑥ in all six strategies had a good negative predictive value (NPV) which was 98.73%.ConclusionUF-5000 bacterial classification cannot be used as a practical reference. 32.20/μL (male) and 39.15/μL (female) for WBC as well as 22.35/μL (male) and 127.25/μL (female) for BACT were used as cut-off values to effectively determine whether UTI occurs. WBC, BACT and LEU joint screening programs were suitable to rapidly and effectively exclude bacterial UTI.     

尿液流水线分析系统联合显微镜检对尿路感染的诊断价值

目的 探讨Sysmex UC-3500尿干化学分析仪(简称UC-3500)与UF-5000尿沉渣分析仪(简称UF-5000)的相关参数联合尿沉渣显微镜检在诊断尿路感染(UTI)中的应用价值.方法 对该院2021年2—3月1036例患者的清洁中段尿进行尿干化学分析、流式尿沉渣分析及尿离心显微镜检,另送尿培养鉴定,以尿培养...     

COBIO XS尿沉渣分析仪在尿路感染筛查中的应用

目的评价COBIO XS尿沉渣分析仪在尿路感染中的应用。方法应用COBIO XS尿沉渣分析仪检测182例疑似尿路感染中段尿标本白细菌和细菌数,以定量尿细菌培养作为诊断尿路感染金标准,应用受试者工作特性(ROC)曲线评价各指标诊断效能。结果尿培养阳性标本56例占30.8%,分离率依次为大肠埃希菌30株占53.6%、肠球菌属9株占16.1%、变形杆菌属6株占10.7%。白细胞计数曲线下面积为0.808(95%CI 0.710～0.867),当白细胞临界值为50/μL,诊断尿路感染敏感度89.0%,特异度83.8%,阳性预测值86.3%,阴性预测值93.7%。细菌计数曲线下面积为0.899(95%CI 0.797～0.923),当细菌临界值为110/μL,诊断尿路感染敏感度82.5%,特异度85.6%,阳性预测值78.5%,阴性预测值88.0%。结论 COBIO XS尿沉渣分析仪具有快速、准确等优点,可作为筛查尿路感染工具。     

Cutoff values for bacteria and leukocytes for urine flow cytometer Sysmex UF-1000i in urinary tract infections

Because urinary tract infections (UTIs) are a quite common disease, the gold standard for diagnosing UTIs is still bacterial culture, although a large percentage of samples are negative: unnecessary cultures can be reduced by means of an effective screening test. The analytic performance of a new urine cytometer, the UF-1000i, has been tested on 1463 urine samples submitted to our laboratory for culture. Bacteria and leukocyte counts have been compared by means of the UF-1000i with colony-forming unit (CFU) quantification on citrate lactose electrolytes deficient agar to assess the best cutoff values. By using quantitative cultures and considering as positive a sample with 10 × 10⁵ CFU/mL, 546 positive samples (37%) were observed. If compared with 10 × 10⁵ CFU/mL, the cutoff values obtained were 125 bacteria/μL and 40 leukocytes/ μL, respectively. Analytic parameters such as sensitivity, specificity, positive predictive value, negative predictive value, and correctly classified incidence were satisfactory. Based on the results obtained in this study, when using the UF-1000i analyzer for a screening test for UTI, a cutoff value of 40 white blood cells/μL should be adopted. The cutoff value for bacteria should be 125/μL for those clinical conditions in which 10 × 10⁵ CFU/mL indicates a positivity.     

住院患者尿路感染筛查中尿有形成分分析的价值

目的评价尿有形成分分析在住院患者尿路感染(UTI)筛查中的应用价值。方法对2018年4月-2018年10月于大连大学附属中山医院住院疑似尿路感染的患者清洁中段尿标本497例进行尿有形成分分析、尿定量细菌培养及菌种鉴定。结果尿有形成分分析仪检测白细胞数和细菌数的阈值为白细胞数64个/μL和细菌数880.6个/μL,以该阈值筛检住院患者尿路感染,其敏感度分别为80.00%和85.19%,特异度分别为79.28%和87.39%。白细胞计数和细菌计数ROC曲线下面积分别为0.860和0.917。结论UF-1000i尿有形成分分析仪中白细胞和细菌计数可作为临床尿路感染快速筛检的辅助实验诊断方法。     

应用受试者工作特征曲线探讨UF-1000i尿沉渣分析仪在快速筛检泌尿系统感染中的应用

目的 应用受试者工作特征（ROC）曲线探讨UF-1000i尿沉渣分析仪定量检测尿沉渣白细胞（WBC）和细菌计数作为快速筛检泌尿系统感染指标的可行性。 方法 2013年8月－12月分别用定量细菌培养法和UF-1000i自动尿沉渣分析仪检测218例疑似泌尿系统感染患者清洁中段尿标本。 结果 218例尿沉渣标本中尿液细菌培养阳性标本为65例,以尿培养阳性为金标准制作ROC曲线,UF-1000i尿沉渣分析仪检测WBC和细菌计数的ROC曲线下面积分别为0.839和0.894;最佳约登指数的WBC和细菌计数的临界值分别为≥31.0/μL和≥38.8/μL。以此为临界值其WBC计数的灵敏度和特异度分别为78.3%和80.4%,阳性似然比为3.99,阴性似然比为1.11;细菌计数的灵敏度和特异度分别为84.3%和80.6%,阳性似然比为4.30,阴性似然比为0.80。 结论 以UF-1000i尿沉渣分析仪检测白细胞计数≥31.0/μL和细菌计数≥38.8 /μL为临界值作为无创性检测指标,在早期筛检泌尿系统感染,判断是否需要进行尿液培养,以及指导临床合理应用抗生素等方面具有重要应用价值。     

评价UF-500i尿沉渣分析仪在诊断尿路感染中的应用

目的 探讨UF-500i尿沉渣分析仪对尿路感染诊断的价值.方法 采集该院345例门诊、住院患者清洗外阴后取中段尿,使用UF-500i尿沉渣分析仪测定尿液白细胞和细菌数,同时进行尿液的细菌培养,以细菌培养结果为金标准,并以大于或等于10×105 CFU(集落形成单位 colony-forming units)/mL 为阳性诊断标准.利用SPSS13.0统计软件绘制受试者工作特征ROC曲线,从而计算出白细胞和细菌数在尿路感染的诊断阈cut off值,得出其灵敏度、特异性、阴/阳性预测值和假阳性/阴性率.结果 尿培养结果阳性的标本96例(27.8%),得出细菌数和白细胞数cut off值分别为130.2个/μL和29.8个/μL,其联合测定对尿路感染诊断的灵敏度,特异度,假阳性率,假阴性率分别为73.58%,95.20%,26.42%,4.80%.结论 UF-500i尿沉渣分析仪是一种简单快速、可靠的尿液筛查实验,其细菌和白细胞计数可以作为尿路感染诊断检测的良好指标.