儿童急性淋巴细胞白血病门冬酰胺酶相关胰腺炎的临床特征及预后分析

目的:分析儿童急性淋巴细胞白血病(acute lymphoblastic leukemia,ALL)治疗过程中发生门冬酰胺酶(asparaginase,ASP)相关胰腺炎(asparaginase-associated pancreatitis,AAP)的临床特点以及影响AAP的危险因素,探讨AAP后ASP再暴露情况及AAP对ALL患儿预后的影响。方法:回顾性收集2015年1月至2020年6月于华中科技大学同济医学院附属同济医院初诊252例ALL患儿临床资料,分析AAP临床特点。使用Logistic回归分析AAP的危险因素,预后分析采用Log-rank检验,使用KaplanMeier法绘制生存曲线。结果:252例ALL患儿中,23例AAP发生率为9.1%。19例(82.6%)患儿AAP发生在诱导缓解期,末次ASP至胰腺炎发生的中位时间为12 d。初诊时总胆固醇≥3.5 mmol/L是AAP发生的独立危险因素(P<0.001)。6例AAP患儿在AAP治愈后进行ASP再暴露,3例发生二次AAP。AAP组患儿5年总体生存(overall survival,OS)为(78.3±8.6)%,非AAP组患儿5年OS为(90.3±2.2)%,差异有统计学意义(P<0.05)。中止组患儿5年OS为(77.8±9.8)%,未中止组患儿5年OS为(90.1±2.1)%,差异具有统计学意义(P<0.05)。结论:末次ASP至胰腺炎发生的中位时间为12 d。AAP患儿较非AAP患儿5年OS低。ASP再暴露有发生二次AAP的风险,但完成化疗方案ASP有助于改善预后。

徐州某规模猪场防疫措施的建立与实施——“五流”生物安全防控

非洲猪瘟在我国流行已有两年多的时间,尽管很多科研团队都在致力于非洲猪瘟疫苗的研发,但尚未有治疗措施和有效的疫苗来控制该病。因此现阶段“生物安全”是控制非洲猪瘟最为有效,也是唯一的方法。文章总结出目前规模化猪场常见的感染风险有“人员流动、物品流动、车辆流动、水源流动、猪群流动”(即“五流”),并提出严格控制“五流”的生物安全防控措施(即“五流”生物安全防控),以减少外界病原与猪只的接触,稀释病原浓度,降低病原载量,最大程度地降低规模化养猪场感染疾病的风险。为当前规模化猪场建立有效的生物安全措施提供参考。

Effects of Lower Heat Value Fuel on the Operations of Micro-Gas Turbine

The characteristics of fuel from biomass, coal and some waste materials are lower heat value and different compositions. The lower heat value fuel (LHVF) can be used on power engine such as boiler, gas engine and gas turbine. Some laboratory and pilot work have been done, but the work done on micro-gas turbine is still limited. The characteristics of LHVF can cause the operations change of micro-gas turbine designed for nature gas. Some possible adjustment and modification methods were mentioned for the use of LHVF on micro-gas turbine. One kind of representative LHVF was chosen and the operations of micro-gas turbine were analyzed. The temperature field and the non-uniformity scale of temperature distribution of combustor were calculated using FLUENT. The feasibility of different adjustment and modification methods were analyzed according to the efficiency, output power and the non-uniformity scale of temperature distribution.