X光机加装定时关机功能

给X光机加装定时关机功能解决了由于操作人员粗心,忘记关机,造成烧毁主变压器事故的问题,定时关机也可有效地延长机器寿命.     

兆伏级锥形束CT影像质量定量分析

Objective To quantitatively analyze the image quality of megavoltage cone-beam CT (MVCBCT) under different scanning conditions to provide reference in clinical applications. Methods Si-emens ONCOR linear accelerator with MVCBCT was used to scan the phantom under different conditions. The image quality was evaluated in terms of image noise, uniformity, spatial resolution, contrast resolution, the number of Monitor Units(MUs) used in imaging,and the size of the reconstruction matrix. The comparison of the image quality between MVCBCT and conventional simulator CT was also analyzed. Results The image noise was decreased with the increase of the number of MUs. The uniformity index showed that the system u-niformity was weakly dependent on MU numbers or the size of the reconstruction matrix. Except for the ima-ges with 5 MUs,all other images had the spatial resolution of 0.4 lp/mm with a reconstruction matrix of 256 ×256. Better low contrast resolution was achieved by using more MUs. For typical pelvis and head-and-neck patients,the imaging dose at the center was 0.8 cGy/MU and 0.7 cGy/MU, respectively,and the maxi-mum dose was about 1.2 cGy/MU. For typical abdomen patients,the image maximum dose and center dose was 1.3 cGy/MU and 0.7 cGy/MU,respectively. Conclusions The image quality of MVCBCT is inferior to the conventional kilo-voltage CT. However,with the optimization of the parameters in imaging,we can a-chieve sufficient image contrast in the bone,air and some soft-tissue structures with low imaging dose to pa-tients. Such images can be used for IGRT.     

A CLINICAL AND LAIBORATORY STUDY OF 196 CASES OF MALARIA

The present study is based upon 196 cases of Malaria in Elizaoeth BJake Hospital from Janrary first to the end of November 1933. Malaria was very prevalent during the year, there being one case in every seven admissions to the hospital. On account of the limited bed capacity, we admitted only severe cases. There were 124 cases, (63 per cent) of Subtertian Malaria, 62 (or 32 per cent) Tertian, and one (or 0.05 per cent) Quartan. The remaining g cases were diagnosed malaria clinically. In one or two cases, we found parasites only after culturing the blood for malaria. The death rate in the entire group was I.5 per cent.     

帕罗西汀治疗HIV感染者和AIDS患者伴发的抑郁症临床观察

目的研究帕罗西汀对HIV/AIDS患者伴发的抑郁症疗效。方法评价我院2007年1月至2009年6月期间34例门诊和住院HIV/AIDS并抑郁症患者采用帕罗西汀治疗的疗效。结果完成6周治疗,HAMD和HAMA评分明显降低。结论帕罗西汀对HIV/AIDS并发的抑郁症疗效肯定。     

体外循环中应用常温含血停搏液诱导停搏的心肌保护作用

目的评价在体外循环中常温含血停搏液诱导心肌停搏的心肌保护作用。方法将28例成年瓣膜置换手术患者随机分为试验组(T组，n=14)和对照组(C组，n=14)，T组以常温含血停搏液(35℃～37℃)诱导心肌停搏直至心电图(ECG)为直线，再改用冷血停搏液；C组则直接以单纯冷血停搏液(6℃～8℃)诱导心肌停搏。分别于麻醉诱导后、停机、停机后6小时、停机后24小时采集动脉血、以ELISA法测定血浆中心肌肌钙蛋白T(cTnT)浓度、分别于冠脉循环阻断前及开放10分钟取右心房肌组织，在H－7000透射电镜下观察心肌形态学。结果(1)临床效果T组自动复跳率(93％)明显高于C组(50％)(P<0．05)；需安装临时起搏器者，T组1例(7％)，C组3例(21％)，无显著性差异(P>0．05)；T组在围术期需没有使用多巴胺者(0％)，明显少于对照组的5例(36％)(P<0．05)；术后拔除气管插管的时间及ICU停留时间T组亦明显短于C组(P<0．05)。(2)心肌生化在停机时和停机6小时，T组血浆cTnT浓度明显低于C组(P<0．05)。(3)心肌形态学T组明显优于C组。结论在体外循环中应用常温含血停搏液诱导停搏，较单纯的冷血停搏液具有更明显的心肌保护作用。     

纤维支气管镜在ICU中的应用

目的明确纤维支气管镜检查及治疗在ICU机械通气患者中应用的价值.方法对我院ICU收治的105例机械通气患者行纤维支气管镜检查及治疗,对检查结果及治疗前后各项指标的变化进行监测.结果治疗前后患者的生命体征得到有效改善(P＜0.05),各项指标好转(P＜0.05),对导管堵塞、肺不张、咯血有较好的诊断及治疗作用.结论纤维支气管镜在ICU危重症机械通气患者中有一定的应用价值.     

野生型p53及相关调控基因的转录、翻译水平与肠道干细胞分化的关系

目的：探讨野生型p53(wtp53)基因及其相关调控基因转录、翻译水平的变化与肠道干细胞分化的关系。方法：利用逆转录-多聚酶链反应（RT-PCR）和免疫组织化学技术，以细胞分化标志肝脂肪酸结合蛋白（L-Fabp）mRNA水平为动态参照，分别检测大鼠胚胎期E14d，E19d和幼鼠其E19d至成年大鼠，RT-PCR能够检测到小肠细胞内L-Fabp的mRNA，其中P2d，L-Fabp的mRNA含量最高，证实这两个期间为肠道干细胞高分化阶段。从胚胎到成年大鼠，小肠细胞p21mRNA及其蛋白表达均为阴性，p53mRNA水平无明显变化。然而从E14d-P2d，小肠上皮细胞p53蛋白信号呈逐渐增强趋势。P7d以后至成年期，p53蛋白信号为阴性。结论：在肠道干细胞迅速分化期，p53蛋白高表达可能是因为其半衰期延长，最终导致蛋白量累积的结果，而与转录水平无关，提示蛋白的稳定性对于p53调节肠道干细胞分化期基因的稳定性十分重要，另外，p53蛋白调节肠道干细胞的分化机制与p21途径无关。     

社区护理服务分析

目的：为了探讨合理的社区卫生服务的医比和适宜护项目。方法：采用任务分析法＋专家咨询＋社会学方法＋文献复习相结合。结果：依照医疗咨询等耗时1105分钟，测血压等耗时141．5分钟，护理输液等耗时493．5分钟，肌肉注射耗时44．5分钟，采血耗时77．5分等结果，医护比依情况不同分别为3．18：1、0．94：1、2．02：1。并对国内已开展护理项目作比较分析，并结合实际，提出社区应开展的护理服务项目的建议。结论：这一项研究结果对卫生行政部门及医疗机构有参考价值。     

人工肝支持系统治疗重型病毒性肝炎的临床研究

目的探讨人工肝支持系统(ALSS)对重型肝炎的疗效.方法应用人工肝支持系统对16例重型病毒性肝炎进行了35例次的治疗.结果治疗后症状明显改善,血总胆红素(TBIL)、血氨(N心)、肿瘤坏死因子-α(TN卜α)水平明显下降,凝血酶原活动度(PTA)明显上升.人工肝支持系统治疗的不良反应在处理后均能好转.结论人工肝支持系统是治疗重型肝炎有效、安全的方法.     

Skin-derived antileucoproteases (SKALPs): characterization of two new elastase inhibitors from psoriatic epidermis

Elastase inhibiting activity (EIA) was demonstrated in the epidermis from lesions and in psoriatic scale, whereas normal epidermis did not contain significant EIA. Two new elastase inhibitors were partially purified and characterized using psoriatic scale as a source. The two species (approximate molecular weights 10 and 20 kDa) were shown to be stable, and high-affinity inhibitors of human leucocyte elastase (Ki less than 10(-10) M). No activity against human cathepsin G could be demonstrated. Cultured human keratinocytes were shown to contain EIA activity similar to that found in psoriatic scale. EIA could also be demonstrated in human epidermis following the induction of an experimental inflammatory response by sellotape-stripping. We propose the acronym SKALP (skin-derived antileucoprotease) as a name for these new proteinase inhibitors.