简介:摘要:本文作者对公司建设的印尼镍铁4#回矿热炉项目的必要性和可行性进行分析;简述项目提出理由和过程。对项目的建设内容及购置关键设备的技术性能和生产工艺流程等进行分析和描述;简要概述项目建设方案;并对项目建设的基础设施条件作简要论述。
简介:AbstractBackground:IgG4-related hypertrophic pachymeningitis is a relative newly recognized and rare manifestation of IgG4-related disease, an immune-mediated fibroinflammatory tumefactive disorder. Fewer than 80 patients have been reported in the literature, and it can mimic common neurosurgical conditions. We describe the clinical presentation of two patients that were initially considered to have a subdural collection, tuberculous meningitis, and a cervical spinal meningioma, but were eventually diagnosed with this disease.Case presentation:Two ethnic Chinese men, 86 and 62 years old, experienced a 4-week history of headache. Both patients had a history of autoimmune disease, namely glomerulonephritis and Grave's disease, respectively. Magnetic resonance brain imaging revealed diffuse dural thickening with the latter patient exhibiting homogeneous and intense gadolinium-contrast enhancement. Since the 86-year-old patient also had progressive bilateral visual loss, giant cell arteritis was suspected and a 2-week course of glucocorticoid therapy was prescribed, but his symptoms failed to improve. The 62-year-old patient also had accompanying low-grade fever and was treated empirically as having tuberculous meningitis although there were no confirmatory microbiological findings. This patient further developed right hemiparesis, and additional imaging revealed a C4/5 intradural-extramedullary contrast-enhancing lesion resembling a meningioma causing cord compression. Both patients underwent neurosurgical intervention with the former undergoing a dural biopsy and the latter having the cervical lesion resected. The final diagnosis was IgG4-related hypertrophic pachymeningitis with the hallmark histological features of lymphoplasmacytic infiltration of IgG4+ plasma cells, storiform fibrosis, and obliterative phlebitis. In addition, their serum IgG4 levels were elevated (i.e., > 135 mg/dL). Both patients received at least 6 months of glucocorticoid therapy while the latter also had azathioprine. Their symptoms improved significantly and recurrent lesions were not detected on follow-up imaging.Conclusions:A high index of suspicion for this condition is suggested when a male patient with a history of autoimmune disease and compatible radiological findings, experiences subacute headache that is disproportionate to the degree of dural involvement. Neurosurgeons should consider early meningeal biopsy to establish a definitive histological diagnosis in order for early effective immunosuppressive treatment to be initiated and to avoid unnecessary morbidity.
简介:摘要对2017年1月至2018年12月广州市妇女儿童医疗中心确诊的4例血友病并椎管内出血患儿的临床资料进行回顾性分析。4例患儿临床表现不典型,早期仅表现为激惹哭闹不安、精神欠佳、抬头乏力,晚期可有斜颈、肢体乏力,易误诊。全脊髓磁共振成像是诊断椎管内出血的重要手段,最常见发病部位为颈胸段和胸腰段。4例患儿中,1例采用手术联合凝血因子 Ⅷ 替代治疗,3例单纯采用凝血因子Ⅷ替代治疗。3例患儿由发病至确诊的时间为1周内,经治疗全部康复;1例2周内确诊,部分康复。婴幼儿血友病并椎管内出血起病隐匿,早期可仅表现为易激惹和哭闹,晚期才出现神经系统症状。提高诊断意识、早期诊断及早期输注凝血因子替代治疗对于预后非常关键。
简介:摘要目的:观察新型中央孔型后房型人工晶状体(ICL-V4c)植入术治疗-10 D以上超高度近视的安全性和有效性,并探讨视力提高情况(△LogMAR)与术前球镜度(SD)之间的关系。方法:回顾性研究。选取2016年12月至2020年1月于北京同仁医院行ICL-V4c植入术治疗超高度近视患者802例(1 380眼),术前SD -23.50~-6.00(-11.54±3.59)D。根据患者术前SD将患者分为A组(-10 D<SD≤-6 D)、B组(-23.5 D≤SD≤-10 D),B组按照组距3 D分为B1(-13 D<SD≤-10 D)、B2(-16 D<SD≤-13 D)、B3(-19 D<SD≤-16 D)、B4(-22 D<SD≤-19 D)、B5(-23.5 D≤SD≤-22 D)共5个亚组。使用Kruskal-Wallis检验及卡方检验分析比较各组患者术前和术后1周、2个月的视力、眼压及视力提高情况。结果:B组患者SD术后得到明显改善(P<0.001),最佳矫正视力(BCVA)得到明显提高(P<0.001);2组患者手术的安全指数和有效指数平均值均>1。△LogMAR和组别之间存在相关性(P<0.001);B3、B4组患者术后△LogMAR明显高于A、B1、B2组(调整后均P<0.001)。B组患者术后眼压高于A组(P<0.001),且术后高眼压的比例更高(P=0.008)。结论:ICL-V4c植入术治疗SD≤-10 D以上的超高度近视是安全、有效的,远期效果需进一步观察;治疗-22~-16 D的超高度近视患者术后收益高于>-16~-6 D的患者。
简介:摘要:本文的研究基于超高清电视的发展趋势,从系统框架和业务流程两个方面,探讨了如何构建电视台4K超高清电视播出系统,并就其中的关键核心技术进行了简要分析,对于该领域的从业人员起到了较好的指导意义。
简介:摘要:目的 探讨不合理用药医嘱,加强不合理用药医嘱的统计与干预,提高治疗药物的规范化使用。方法 对我院静脉配置中心 2021年4月不合理用药医嘱进行统计,加强对不合理用药医嘱的分析与干预,以达到药物规范和合理使用的治疗目的。 结果与结论 静脉配置中心对不合理用药医嘱的统计与干预,可以减少不合理用药医嘱的执行,减少药物不良反应与药物配伍禁忌给病人带来的危害,加强病人的治疗效果,促进病人康复,保证患者的用药安全,避免药物不合理使用引起的不必要的用药危害。
简介:摘要:自然水体含酚量降低,对于人们正常用水产生的影响较小,但当水体中被排放入大量工业废水,酚类性质的化合物含量提升,就会使破环水体结构,造成污染问题。酚类水体污染不仅会对人们的身体健康状态产生不利影响,引发急性中毒、神经系统紊乱等相应症状,还会对相关渔业、农田种植等产业产生相应的影响,导致水生植物、鱼类等死亡比例提升。当前,对水体中挥发酚检测方法多样,本文主要对常见的4-氨基安替比林分光光度法(HJ 503-2009)进行分析,并结合测定干扰要素的调查研究,对技术的具体应用形式进行总结。
简介:摘 要:舒伯特是十九世纪奥地利最伟大的作曲家之一。[1]《即兴曲》也是舒伯特创立的新体裁,①是一种钢琴新形势的开始。本文通过对舒伯特作品op90.no4分析,可以充分了解舒伯特即兴曲op90.No4的艺术特征与演奏分析。本文采用收集资料法、举例说明法来分析该作品。