Fluctuations in Tumor Blood Flow under Normotension and the Effect of Angiotensin II-induced Hypertension

To elucidate the significance of angiotensin II (AID-induced hypertension chemotherapy, changes of tissue blood flow both in normal subcutis and in tumors (AH109A, LY80) were measured with the hydrogen gas clearance method. A newly-developed anesthetic machine was used to keep the animals' condition constant. Tissue blood flow in normal subcutis and tumors always fluctuated with time under normotension. The nature and the rate of fluctuation in tumor Wood flow were almost identical in two different types of tumors. However, the fluctuation of blood flow in tumor and that in normal subcutis were almost always inversely related when blood flows in these different tissues were measured simultaneously, i.e., when tissue blood flow in normal subcutis decreased, tumor blood flow increased, and vice versa. The findings supported the idea that the connection mode between the tumor vascular bed and normal vascular bed is a parallel circuit. Vascular resistance in the normal vascular bed under All-induced hypertension seemed to be greater than that under normotension, because the All-increased tumor blood flow always exceeded the maximum tumor blood flow under normotension. Due to the fluctuations of tumor blood flow, no-flow or low-flow areas, resistant to delivery of anti-cancer drugs, moved sporadically within the tumor under the normotensive condition. However, good conditions for drug delivery to tumor tissue were induced by All-induced hypertension.     

全自动可定量洗胃机的研制

本文介绍一种全自动可定量洗胃机的基本结构、工作原理及软件程序。该机具有设定洗胃液的进胃量，检测进出胃的液量，进出胃液量不平衡时报警，出胃过程堵塞时报警，洗胃液用尽时报警等功能。具有智能化程度高、安全可靠性好、使用方便等特性。     

C型臂X线机引导下经皮双侧骶髂拉力螺钉固定治疗骶骨H形骨折

目的探讨骶骨H形骨折可行的治疗方法。方法运用C型臂X线机引导下经皮双侧骶髂拉力螺钉固定治疗骶骨H形骨折15例。结果15例患者均获随访，随访时间7—34个月，骨折临床愈合时间3～5个月，术后均未留下明显行走障碍，下蹲等活动接近正常。结论在C型臂X线机精确引导下，经皮双侧骶髂拉力螺钉固定技术能有效地固定骶骨H形骨折中的垂直骨折，纠正骨盆垂直方向移位，操作简洁安全，疗效可靠。     

计算机辅助带锁髓内钉固定胫骨骨折全程规划手术系统的实验研究

目的评价计算机辅助带锁髓内钉固定胫骨骨折全程手术规划系统的有效性及临床可行性。方法在分析系统结构和操作流程的基础上,利用塑料胫骨模型(9根)和尸体胫骨(12具下肢肢体)进行基于C型臂透视图像的术中骨折肢体图像拼接、骨折闭合复位及髓内钉置入仿真测量实验；利用胫骨模型及尸体胫骨进行图像拼接精度分析,以验证图像拼接与规划模块的正确性。利用尸体胫骨进行计算机辅助骨折闭合复位试验,分析骨折复位机构模块的操作可行性。结果图像拼接模块只需术中采集7～10张有效的C型臂图像即可拼接出下肢长骨的全景图像,为采集图像所需的术中透视时间为(19．75±0．61)s；计算机进行X线透视图像采集和拼接总时间为(4．17±0．86)min；塑料模型拼接精度达(1．26±0．76)mm。结论该系统实现了基于C型臂拼接图像的计算机辅助胫骨骨折髓内钉内固定全程手术规划,术中可完成骨折复位图像分析、手术规划、虚拟仿真,髓内钉型号选择以及骨折复位等关键操作,为计算机辅助骨科手术系统治疗长骨骨折搭建了精确、安全、稳定的软硬件技术平台。     

An Evaluation of the Residual Activity of Antiseptic Handrub Lotions: An ‘In Use’ Setting Study

An evaluation of the residual activity of quick-drying agents (alcoholic solutions) used for hygienic hand disinfection is described. We looked for residual efficacy following hand disinfection with soap and water alone or followed by one of two alcoholic handrub lotions supplied from an automatic hand washing machine. The bacterial counts on the hands obtained before and within 2 successive hours after disinfection showed that alcoholic chlorhexidine was the most effective for 10 minutes after contamination of the hands. WELPAS® (alcoholic chlorbenzarconium) followed this in its immediate effect and was better than soap and water alone. There were no significant differences after 30‘ or 120‘ between the three disinfecting methods.     

麻醉机呼吸环路碱石灰尘埃污染的情况

目的：观察通气时碱石灰尘埃向呼吸环路中的排放及被呼吸道阻留的情况。方法：麻醉机环路连接集尘袋及筛装新碱石灰。ＪＴ库尔特颗粒计数仪动态测定排尘量。其颗粒测量范围为１～１２５μｍ３，通气１０分后测定呼吸环路加集尘袋内的尘埃量即为总尘量，收取称干重得尘埃分散度。通过对Ｎａｒ－ｃｏｍｅｄ、Ｄｒａｇｅｒ、Ｓｕｌａｒ８０８和１０３麻醉机行上述测量后，另以前者（Ｎ机）为例，其环路按相应处理分干燥、湿化和过滤三组，志愿者模拟通气１０分测定环路含尘量后与总尘量差得气管肺的阻留量。结果：四种麻醉机环路内碱石灰尘埃的分散度达１３ｍｇ／ｍ３以上。尘埃排放量与通气时间呈正比（ｒ＝０．９５，Ｐ＜０．０１）。Ｎ机干燥组中总排尘量的半数以上被气管肺阻留。湿化组该阻留量明显下降（Ｐ＜０．０５），而过滤组环路内总排尘量和气管肺阻流量下降更为显著（Ｐ＜０．０１）。结论：使用新碱石灰通气时，麻醉机环路内存在严重的尘埃污染，环路内湿化有一定的防尘作用，但以滤过处理效佳。     

岛津数字胃肠机IF OVER故障产生的原理及维修

分析了岛津3200数字胃肠机IFOVER故障产生的原因，并结合实际故障现象，具体介绍了排除方法。     

下颌骨侧位摄影X线中心线倾斜角度与垫板倾斜角度关系之探讨

目的探讨下颌骨侧位摄影分别采用一倾斜角度为α的垫板及未采用时，X线中心线倾斜角度各为β、γ之间的关系，为更简捷地拍好下颌骨提供理论参数和实践依据。方法立足于教科书，运用X线摄影原则与数学几何原理进行推理演绎。结果二者之间存在着可替换的关系，即γ=α＋β，可以大胆地去除垫板进行直接拍摄。结论不用垫板，只需通过增大X线中心线倾斜角度的方法，同样也能拍摄出一张好照片，且可操作性强，简便易行，实际使用价值更大。     

Predicting development of sustained unresponsiveness to milk oral immunotherapy using epitope-specific antibody binding profiles

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Artificial Circulation of the Liver: Machine Perfusion as a Preservation Method in Liver Transplantation

Due to the sharp increase in liver transplant candidates and the subsequent shortage of suitable donor livers, an extension of the current donor criteria is necessary. Simple cold storage, the current standard in organ preservation has proven to be insufficient to preserve extended criteria donor livers. Therefore a renewed interest grew toward alternative methods for liver preservation, such as hypothermic machine perfusion and normothermic machine perfusion. These “new” preservation methods were primarily assessed in rat models, and only a few clinically relevant large animal models have been described so far. This review will elaborate on these alternative preservation methods. Anat Rec, 291:735–740, 2008. © 2008 Wiley‐Liss, Inc.