采用国家标准对TEK 5000血细胞分析仪性能评价

目的采用国家行业标准检测及评价TEK5000全自动血细胞分析仪的性能。方法根据《血液学分析仪》标准，并参照美国国家实验室标准化委员会（NCCLS）文件和国际血液学标准化委员会（ICSH）文件要求对常用血液指标进行检测。结果TEK5000全自动血细胞分析仪的测量准确性、重复性和校准功能验证均在允许范围内：线性良好；携带污染率较低；与Sysmex kx-21相比较相关性良好。结论TEK5000全自动血细胞分析仪功能齐全、结果稳定、准确，可参与国内外市场竞争，用于大、中型医院临床标本的全血细胞分析。     

Sysmex XE-5000全自动血细胞分析仪性能评价

目的 对Sysmex XE-5000全自动血细胞分析仪的主要性能进行评价.方法 按照国际血液学标准化委员会（ICSH）制定的评价标准,对XE-5000的精密度、携带污染率、线性、总重复性进行测定,并将其白细胞分类结果与手工分类结果进行比较.结果 XE-5000的精密度、携带污染率、线性、总重复性都在允许的范围内,白细胞分类结果比较,Neut、Lym、Mon、Eos和Baso相关系数（R）分别为0.98、0.99、0.89、0.90和0.76.结论 Sysmex XE-5000全自动血细胞分析仪性能良好,是较理想的全自动血细胞分析仪.     

CELL-DYN1800全自动血细胞分析仪性能评价

目的评价CELL-DYN1800全自动血细胞分析仪的性能。方法以国际血液学标准委员会和美国临床实验室标准化委员会制定的评价标准，对仪器的各种性能包括精密度（批内、批间）、携带污染率、线性范围、准确度、背景计数进行评价。结果高、中、低三个水平的批内、批间不精密度小于4％；各参数的携带污染率小于1％；线性范围相关系数（r^2）〉0．99；准确性的偏离指数（DI）〈0．1％；背景计数低（0）。结论CELL-DYN1800全自动血细胞分析仪各种性能良好，测定参数快速，线性范围较宽，准确度、精密度良好，可作为医院全血细胞分析正常结果的筛检工具。     

XN-9000全自动血液分析仪性能评价

目的：系统评价Sysmex XN-9000全自动血液分析仪性能。方法以国际血液学标准化委员会（ICSH）、美国临床和实验室标准协会（CLSI）及WS/T 406-2012临床血液学检验常规项目分析质量要求的评价标准对其性能进行评价。结果 XN-9000全自动血液分析仪检测的白细胞计数（WBC）、红细胞计数（RBC）、血红蛋白（HGB）、红细胞压积（HCT）、平均红细胞体积（MCV）、平均红细胞血红蛋白含量（MCH）、平均红细胞血红蛋白浓度（MCHC）、血小板计数（PLT）的精密度、线性、正确度及准确度良好,其检测WBC、RBC、HGB、PLT的携带污染率均＜0.5%,其检测WBC、RBC、HGB、HCT、PLT的结果与Sysmex XE-5000全自动血液分析仪的可比性良好,并对这5个项目的不确定度进行了计算。结论 Sysmex XN-9000全自动血液分析仪分析性能良好。     

两种型号全自动血细胞分析仪的分析性能对比

目的 评价BC-5500与SYSMEX XS-800i全自动血细胞分析仪性能,以保证不同仪器测定结果的准确性和一致性.方法 按照国际血液学标准化委员会(ICSH)有关规定,对BC-5500和SYSMEX XS-800i全自动血细胞分析仪从精密度,携带污染率,线性,与ABX-120全自动血细胞分析仪检测结果的相关性,白细胞分类准确性等方面进行评价.结果 BC-5500及SYSMEX XS-800i全自动血细胞分析仪的批间、批内精密度及总精密度变异系数(CV)均在可接受范围内;各分析参数的携带污染率均低于1.0%;与ABX-120全自动血细胞分析仪的检测结果进行对比分析,各项参数相关性良好;白细胞分类准确性符合要求.结论 BC-5500及SYSMEX XS-800i全自动血细胞分析仪性能良好,检测结果准确可靠,在临床应用中可以互换.     

ADVIA 2120全自动血液分析仪临床应用评价

现代科学技术和基础医学的发展，传统的手工检测血细胞指标的方法已经被日趋完善的电子血细胞分析仪所取代。目前三分类的全自动血细胞分析仪已普及到各级医院，全自动五分类血细胞分析仪也进入各大型医院。本院引进了美国Bayer公司生产的ADVIA2120全自动五分类血细胞分析仪，为了解该仪器的性能，笔者参照国际血液学标准化委员会（ICSH）血液细胞分析仪的评价标准对ADVIA2120血液细胞分析仪进行评价。现报道如下。     

日本光电6318K全自动血细胞分析仪性能评价

目的 了解日本光电公司生产的新型MEK－6318K全自动血细胞分析仪的性能。方法 按照国际血液学标准化委员会（ICSH）的有关规定对常用血指标进行初步测试。结果 得出日本光电6318K血细胞仪的线性良好；批内、批间重复性良好；总重复性CV值在要求范围内；互染率均＜2％；对照试验与CD－1600对比分析，两者具有高度相关性，无统计学差异；异常样品测定与正常样品比较RDW有显著差异（P＜0．05）。提示 日本光电MEK－6318K血细胞仪分析结果准确、可靠，可供国内大中小医院选用。     

两种血液分析仪性能评价

目的评价两种全自动血细胞分析仪（KX一21与ABXPENTRA60）的性能,以验证不同仪器测定结果的准确性和一致性。方法按照国际血液学标准化委员会（ICSt[）有关规定,对KX一21与ABXPENTRA60KX一21全自动血细胞分析仪从携带污染率、精密度、线性、及与ABXPENTRA60A全自动血细胞分析仪相关性和白细胞分类准确性等方面进行评价。结果KX一21的批间、批内精密度及总精密度变异系教（CV％）均在可接受范围内;各分析参数的携污带染率均〈1．O％;与ABXPENTBA60对比分析,各项参数相关性良好;白细胞分类准确性符合要求。结论KX一21与ABXPENTRA60血液分析仪性能良好,检测结果准确可靠,在临床应用中结果可以互认。     

多发性外伤伴 EDT A-K2致血小板假性减少1例报告

全自动血液分析仪进行全血细胞计数,大大提高了检测的准确度和精确度,全血细胞分析多采用 EDT A-K2抗凝,因其对红、白细胞形态影响很小,国际血液学标准化委员会（ICSH ）1993年文件建议EDTA-K2作为全血细胞分析的首选抗凝剂,被广泛的推广和应用。但EDT A-K2偶尔可引起血小板聚集,导致血液分析仪不能对其进行正确识别,而使其检测结果大大低于真实值。近期本科室在临床工作中遇到1例多发性外伤伴EDTA-K2依赖性假性血小板减少（EDTA-PTCP）,现报道如下。     

迈瑞BC-5800全自动血液分析仪性能评价

目的 对迈瑞BC-5800全自动血液分析仪进行性能评价.方法 按照国际血液学标准化委员会(ICSH)和美国临床实验室标准化委员会(NCCLS)制定的评价方案为标准进行评价试验.结果 BC-5800检测全血细胞计数(CBC)线性良好,相关系数(r)均为0.999,携带污染率非常低,CBC各参数的精密度高,其与Beckm...     

不同核酸抽提方法对HCV—RNA检测效果的影响

采用TEK（0．2mol／LTris－HCLpH7．6．250mmol／LEDTA，200mg／L蛋白酶K）作为裂解剂处理样本，再用无水乙醇沉淀HCVRNA作为模板，用于多聚酶链反应检测HCVRNA，该法与AGPC法及TENS法比较，由于不使用SDS，避免TaqDNA多聚酶的强抑制原，省略了酚-氯抽提这一步骤，而又达到分高纯化RNA模板的目的。经对215例抗HCV阳性血清用上述三种方法进行比较分析，结果用三种方法制备的RNA模板进行多聚酶链反应，其HCVRNA阳性率无显著性差异．但TEK法较AGPC法及TENS法操作简单、稳定、不易污染，特异性好等优点，经用加挂生物素的合成寡核苷酸探针对HCVRNA逆转录PCR扩增产物作斑点杂交，显示有很好的特异性，具有明显的实用价值，批量测定在一个工作日可完成，此法的建立为制备RNA模板提供了方法及经验，适合标本量较大的临床单位使用，值得推广应用。     

XE-5000血液分析仪检测有核红细胞的评价

目的探讨Sysmex XE-5000血液分析仪(简称XE-5000)自动计数外周血有核红细胞(NRBC)的方法学特点,评价其临床应用价值。方法评析XE-5000重复性、线性范围、携带污染率,并对391份静脉血标本做常规测定,评价其对NRBC的报警、定量测定,并与手工涂片法进行对照。结果 XE-5000测定NRBC的重复性较好,线性范围较广,携带污染率较小。当NRBC比例>5.0%时,则引起白细胞计数和淋巴百分比计数假性增多。以显微镜复检为金标准,XE-5000与显微镜计数法计数外周血中NRBC数量有极好的相关性(r=0.997),其NRBC报警的敏感性为100.0%,特异性为85.4%。结论 XE-5000可灵敏、准确、精密地自动计数外周血中NRBC,适合临床检测NRBC。     

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.     

Long-term sustained release of ganciclovir from biodegradable scleral implant for the treatment of cytomegalovirus retinitis.

The previous scleral implant composed of poly(D, L-lactide-co-glycolide) with ganciclovir (GCV) had some disadvantages such as the second burst in the late phase of release. In this study, the GCV release rate from scleral implants was modified by blending poly(D,L-lactide) (PLA) of two different molecular weights. The scleral implants were prepared by blending PLA-70000 (molecular weight: 70000) and PLA-5000 (molecular weight: 5000) or PLA-130000 (molecular weight: 130000) and PLA-5000 at weight ratios of 100/0, 95/5, 90/10, 80/20, and 0/100. In vitro release tests were performed in 0.1 M phosphate-buffered solution (pH 7.4) at 37 degrees C. An increase in the blended amount of PLA-5000 clearly accelerated the GCV release and the onset of the second burst in the late phase of release tended to delay. The two implants both prepared at a blend ratio of 80/20 successfully prevented the second burst and the GCV release profiles followed the pseudozero-order kinetics after the initial burst as resulting from a diffusional mechanism following Higuchi's equation. Duration of the sustained GCV release could be controlled by changing the blending ratio of high and low molecular weight PLA. The 25% GCV-loaded scleral implants composed of PLA-70000 and PLA-5000 with a blending ratio of 80/20 were implanted in pigmented rabbit eyes. The GCV concentrations in the vitreous after implantation of PLA-70000/PLA-5000 scleral implant with a blending ratio of 80/20 were maintained in the range of effective level for 6 months without a significant burst. Our results suggest that the blended implants are promising for the intraocular controlled drug delivery over a period of several months to one year to treat cytomegalovirus retinitis.     

Automated white blood cell counts in cerebrospinal fluid using the body fluid mode on the platform Sysmex XE-5000

Abstract

Background. The Sysmex XE-5000 offers automated quantification of red blood cells and white blood cells (WBCs) in body fluids, with differentiation of polymorphonuclear cells (PMNs) and mononuclear cells (MNCs). Methods. We evaluated automated WBC counting in cerebrospinal fluid (CSF) using the body fluid mode on the Sysmex XE-5000, comparing it with flow cytometry as the reference method, and also with manual counting by microscopy. Experimental analysis for linearity and limit of detection was performed by diluting isolated WBCs in cell-free CSF. To study the ability to discriminate between PMNs and MNCs, samples were spiked using MNCs separated from peripheral blood. Comparison of WBC counts between a counting chamber and the XE-5000 was performed for 198 CSF samples. Results. In the experimental set-up, within-run (CV 19%) and between-day imprecision (CV 15.3%) in quantitating total number of WBC on XE-5000 was acceptable for WBC counts ≥ 25 × 10⁶/L. Compared with expected cell counts, mean bias was + 2.6% for flow cytometry, + 5.5% for XE-5000 and ? 73.2% for manual counting. Differentiation between PMNs and MNCs was in concordance with flow cytometry. In comparisons of clinical CSF samples, overall agreement between the XE-5000 and manual counting was observed in 81% of the samples, but mean difference in WBC differentiation was higher for PMN (51.1 × 10⁶/L) than for MNC (7.95 × 10⁶/L). Conclusion. Despite limited precision at low WBC counts, XE-5000 could be a favourable alternative to the labour-intensive, time-consuming and less reliable manual counting and cuts turnaround times in routine CSF-based diagnosis.     

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...     

Efficacy of unfractionated heparin for thromboembolism prophylaxis in medical patients

A common mode of deep vein thrombosis prophylaxis in medical inpatients is unfractionated heparin 5000 U subcutaneously (s.q.) twice daily. We examined the evidence in favor of using this dose of heparin in this group of patients. MEDLINE was searched for studies using the words deep vein thrombosis prophylaxis and heparin. All randomized controlled trials comparing heparin and placebo or heparin and a low molecular weight heparin were used. Relative risk was 0.4 (95% confidence interval 0.22-0.73) in studies comparing heparin 5000 U s.q. b.i.d. with placebo. Relative risk was 0.28 (95% confidence interval 0.21-0.38) in studies comparing heparin 5000 units s.q. t.i.d. versus placebo. In studies comparing unfractionated heparin with enoxaparin relative risk was 1.42 (95% confidence interval 0.99-2.05). Heparin 5000 U s.q. b.i.d. is less efficacious than low molecular weight heparins and unfractionated heparin 5000 U s.q. t.i.d.     

XE-5000血细胞分析仪计数有核红细胞的性能评价

目的探讨SysmexXE．5000血细胞分析仪自动计数外周血有核红细胞（NRBC）的方法学特点,评价其临床应用价值。方法评析其重复性、线性范围、携带污染率,并对697份静脉血标本作常规测定,评价其对NRBC的报警、定量测定,并与手工涂片法进行对照。结果XE．5000血液分析仪测定NRBC的重复性较好,线性范围较广,携带污染率较小。以显微镜复检为金标准,XE．5000与显微镜计数法计数外周血中NRBC数量有极好的相关性（r=0．997）,其有核红细胞报警的灵敏度为100％,特异度为85．1％。结论SysmexXE．5000血细胞分析仪可灵敏、准确、精密地自动计数外周血中NRBC,适合临床检测NRBC。     

Evaluation of Diabur-Test 5000: a cooperative study carried out at 12 diabetes centers

Diabur-Test 5000, a new test strip for urinary glucose, permits the accurate measurement of up to 5% glucose concentrations in urine. In a survey carried out at 12 diabetes centers in Europe, the new test strip was tested in laboratory trials and routine self-monitoring. There was good agreement between the test strip and the quantitative glucose determination on 4105 urine samples in the laboratory trials. A total of 185 patients used Diabur-Test 5000 for self-monitoring; nearly all reported favorably on the new test strip. Both the laboratory tests (on 1677 urine samples) and self-monitoring (on 4309 urine samples) showed Diabur-Test 5000 to be more sensitive compared with other rapid diagnostic tests. The new test strip is highly suitable for the determination of urinary glucose, particularly in routine self-monitoring.     

Alpha-(1-3)- and alpha-(1-6)-D-mannose-specific plant lectins are markedly inhibitory to human immunodeficiency virus and cytomegalovirus infections in vitro.

The alpha-(1-3)-D-mannose- and alpha-(1-6)-D-mannose-specific agglutinins (lectins) from Galanthus nivalis, Hippeastrum hybrid, Narcissus pseudonarcissus, and Listera ovata inhibited infection of MT-4 cells by human immunodeficiency virus types 1 and 2 (HIV-1 and HIV-2) and simian immunodeficiency virus at concentrations comparable to the concentrations at which dextran sulfate (molecular weight, 5,000 [DS-5000]) inhibits these viruses (50% effective concentration, 0.2 to 0.6 microgram/ml). Unlike DS-5000, however, the plant lectins did not inhibit the replication of other enveloped viruses, except for human cytomegalovirus (50% effective concentration, 0.9 to 1.6 microgram/ml). The plant lectins suppressed syncytium formation between persistently HIV-1- or HIV-2-infected HUT-78 cells and uninfected MOLT-4 (clone 8) cells at concentrations that were 5- to 10-fold lower than that required for DS-5000. Unlike DS-5000, however, the plant lectins did not inhibit HIV-1 binding to CD4+ cells. Combination of the plant lectins with DS-5000 led to a potent synergistic inhibition of HIV-1-induced cytopathogenicity in MT-4 cells and syncytium formation between HIV-infected HUT-78 cells and MOLT-4 cells. Our data suggest that alpha-(1-3)-D- and alpha-(1-6)-D-mannose-specific plant lectins interfere with an event in the HIV replicative cycle that is subsequent to the attachment of the virions to the cells (i.e., the fusion process).