Successful Treatment of Erdheim-Chester Disease With Coronary Artery Involvement

Erdheim-Chester disease (ECD) is a rare non-Langerhans histiocytosis and inflammatory myeloid neoplasm with poor prognosis. Symmetric long bone osteosclerosis occurs in nearly all patients, but other organs are often involved. Coronary artery involvement is rare, but was encountered in a patient who experienced angina. Radiologic presentation and histologic findings were consistent with diagnosis of ECD. A soft-tissue mass was found surrounding the right atrium, ascending aorta, and all branches of coronary artery. Interferon-alfa treatment was successful. In conclusion, we recommend coronary artery computed tomography angiography for cardiovascular evaluation of ECD and interferon-alfa to treat ECD.     

XC-A30A型全自动血沉分析仪的应用评价

目的探讨XC-A30A型全自动血沉分析仪测定红细胞沉降率(ESR)的重复性、准确性及影响因素。方法抽取高、中、低三组血沉值共27份进行重复性试验,对做血沉检查的198例患者,采用两法测定,以统计学方法分析仪器法的准确性,抽取10例贫血患者标本(压积<0.30)和10例压积正常且魏氏法ESR值在21～100 mm/h的标本对照,分析贫血标本用仪器测定的可行性。结果重复性:除1例(CV为16.1%)外,其余26例CV均<5%。准确性:ESR值在2～100 mm/h各组差异无统计学意义(P>0.05),但ESR值>100 mm/h者两组差异有统计学意义(P<0.05)。贫血标本采用两法测定的差值与对照组比较差异有统计学意义(P<0.05)。结论 XC-A30A型全自动血沉分析仪具有良好的重复性,准确性较高,贫血标本用该仪器测定准确性也较高,适合医院快速准确的报告血沉结果。但对于ESR>100 mm/h时建议用手工法复查。     

Assessment of light transmission aggregometry on the routine coagulation analyzer Sysmex CS-2500 using CE-marked agonists from Hyphen Biomed

Light transmission aggregometry (LTA) is still considered as the “gold standard” for platelet function assessment but, as acompletely manual technology, it is labour intensive. This challenge can be overcome by performing platelet aggregometry in anautomated method on a routine coagulation analyzer. We aimed to compare and correlate results obtained from a traditional manual LTA solution realized in our Reference Center with an optimized automated system using CE-marked agonist reagents. Platelet rich plasma from patients with suspected platelet disorders, von Willebrand disease or antiplatelet therapy have been assessed using a wide range of agonist concentrations. Results were expressed as Maximal Platelet Aggregation and correlation was analyzed using the Passing and Bablok regression test. Platelet aggregometry studies were performed in 49 samples. Maximal aggregation response with ADP (0.5-10 μM), collagen (2 mg/μL), ristocetin (1.2 mg/mL) and arachidonic acid (1 mM) agonists showed significant correlation between the two aggregometers (p< .001). We observed a more variable response using lowconcentrations of ADP (≤5 μM). Moreover, we also noted discrepancies with the low dose of ristocetin, showing excessive paradoxical agglutination with the CS-2500, suggesting that a lower ristocetin dose should be used with this system. These data show that CS-2500 has the advantages of a walk-away technology and the use of CE-marked reagents also permit the possibility of an easier certification.     

340nm波长酶标免疫分析仪的实现

本文详细介绍了支持340hm波长酶标免疫分析仪工作原理和电路结构的设计与实现。通过准确性测试、线性度测试和重复性测试，证实该酶标免疫分析仪实现支持340nto波长的测试，能很好地满足临床某些科研测试的需求，是高端酶标的一个重要体现。实验还证明，采用一定的软硬件技术，配合光路的设计，能使340nm波长完全达到国家对酶标免疫分析仪的性能标准。     

Mitochondrial compromise in 3‐year old patas monkeys exposed in utero to human‐equivalent antiretroviral therapies

Antiretroviral (ARV) drug therapy, given during pregnancy for prevention of mother‐to‐child transmission of human immunodeficiency virus 1 (HIV‐1), induces fetal mitochondrial dysfunction in some children. However, the persistence/reversibility of that dysfunction is unclear. Here we have followed Erythrocebus patas (patas) monkey offspring for up to 3 years of age (similar in development to a 15‐year old human) after exposure of the dams to human‐equivalent in utero ARV exposure protocols. Pregnant patas dams (3–5/exposure group) were given ARV drug combinations that included zidovudine (AZT)/lamivudine (3TC)/abacavir (ABC), or AZT/3TC/nevirapine (NVP), for the last 10 weeks (50%) of gestation. Infants kept for 1 and 3 years also received drug for the first 6 weeks of life. In offpsring at birth, 1 and 3 years of age mitochondrial morphology, examined by electron microscopy (EM), was compromised compared to the unexposed controls. Mitochondrial DNA (mtDNA), measured by hybrid capture chemiluminescence assay (HCCA) was depleted in hearts of patas exposed to AZT/3TC/NVP at all ages (P < 0.05), but not in those exposed to AZT/3TC/ABC at any age. Compared to unexposed controls, mitochondrial reserve capacity oxygen consumption rate (OCR by Seahorse) in cultured bone marrow mesenchymal fibroblasts from 3‐year‐old patas offspring was ～50% reduced in AZT/3TC/ABC‐exposed patas (P < 0.01), but not in AZT/3TC/NVP‐exposed patas. Overall the data show that 3‐year‐old patas sustain persistent mitochondrial dysfunction as a result of perinatal ARV drug exposure. Environ. Mol. Mutagen. 57:526–534, 2016. © 2016 Wiley Periodicals, Inc.     

全血细胞分析仪操作台的研制

本文阐述了全血细胞分析仪操作台的研制过程。该操作台主要由主机置放台面、气源存放箱、溶血剂存放托盘、稀释液及废液存放滑车等部分构成。与普通操作台相比，该操作台具有美观整洁、降低噪音、方便省力、无污染等优点，符合三级医院实验室要求，适合与全血细胞分析仪配套使用。     

Critical flicker frequency test predicts overt hepatic encephalopathy and survival in patients with liver cirrhosis

BackgroundA critical flicker frequency (CFF) ≤39 Hz identifies cirrhotic patients with minimal hepatic encephalopathy (mHE) and predicts the risk of both overt hepatic encephalopathy (oHE) and mortality in patients with previous episodes of decompensation and/or oHE.AimsHerein, we evaluated the effectiveness of CFF in predicting the first episode of oHE and survival in cirrhotics who had never experienced an episode of oHE.MethodsOur cohort study of 134 patients and 150 healthy subjects were examined. A CFF > 39 Hz was considered normal and pathological when ≤39 Hz. The median follow up was 36 months.ResultsAt baseline, all controls had CFF > 39 Hz. Ninety-three patients had a CFF > 39 Hz and 41 had a CFF ≤ 39 Hz. The prevalence of CFF ≤ 39 Hz significantly increased with the progression of the Child–Pugh class (p = 0.003). Moreover, the risk of oHE was increased by CFF ≤ 39 (p < 0.001, by log-rank test) [HR = 7.57; CI(3.27–17.50); p < 0.0001, by Cox model] and ammonia [HR = 1.02 CI(1.01–1.03), p = 0.0009]. Both a CFF value ≤ 39 Hz and Child–Pugh class were independent predictors of mortality by Cox model [HR = 1.97; CI(1.01–3.95), p = 0.049; HR = 3.85 CI(1.68–8.83), p = 0.003].ConclusionsCFF predicts the first episode of oHE in cirrhotics that had never experienced oHE, and predicts mortality risk. These findings suggest that cirrhotic patients should be routinely screened by CFF.     

肉类样品中总汞的直接测定方法研究

目的探讨直接测定肉类样品中汞含量的方法。方法应用测汞仪建立汞标准应用液含量标准曲线,肉类样品经粉碎机捣碎后称取适量直接测定汞含量,并与原子荧光光谱法测定汞含量进行比较。结果试验筛选出肉类样品直接测定法最佳测定条件分别为干燥温度200℃,时间1 min;分解温度650℃,时间1.5 min。标准曲线相关系数≥0.999 8,加标回收实验汞回收率93%-98%,标准物质质控样品测定相对标准偏差4.79%-5.37%,与原子荧光光谱法测定汞含量差异无统计学意义（t=0.608,P〉0.05）。结论采用测汞仪直接测定样品中总汞含量,方法简便、快速、准确、重复性好、样品勿须前处理。