128层螺旋CT血管成像对主动脉夹层的诊断价值

目的：探讨128层螺旋CT血管成像在主动脉夹层的诊断价值。方法：15例主动脉夹层,全部进行128层螺旋CT胸腹联合平扫及增强,并将原始数据在工作站进行多平面重建（MPR）、阴影表面显示（SSD）、最大密度投影（MIP）及容积处理（VR）等后处理。结果：15例均很好地显示了主动脉夹层全程及其分支,真腔、假腔、内膜片及夹层动脉瘤的部位、范围。结论：128层螺旋CT血管成像是诊断主动脉夹层准确、快捷、有效的首选检查方法,具有较高的临床应用价值。     

压剪型裂纹扩展的无网格法计算

运用无网格法模拟受压岩体中裂纹的粘接、滑移和张开行为，计算了翼形裂纹尖端应力强度因子，并对单裂纹和双裂纹的扩展进行了分析模拟数值结果表明了计算方法的可行性。     

Anticoagulation therapy in intra-aortic balloon counterpulsation： Does IABP really need anti-coagulation ？

OBJECTIVE: To investigate if intra-aortic balloon pump (IABP) is contraindicated without anticoagulation therapy. METHODS: Some 153 IABP patients in the King Abdulaziz Cardiac Center (KSA) were randomly assigned into two groups. Anticoagulation group (Group A) consisted of 71 patients who were given heparin intravenously with target aPTT 50-70 seconds. Non-anticoagulation group (Group B) consisted of 82 patients without intravenous heparin during balloon pumping. Hematological parameters including platelet count, D-dimer, Plasminogen activator inhibitor-1 (PAI-1) and fibrinogen degradation products (FDP) were checked respectively at the point of baseline, 24 hours, 48 hours and 24 hours post IABP counterpulsation. Clot deposits on balloon surface, vascular complications from IABP including bleeding and limb ischemia were recorded. RESULTS: Platelet count and PAI-1 level decreased at 24 hours and 48 hours in both groups (P<0.05). D-dimer and FDP level increased at 24 hours and 48 hours in both groups (P<0.05), but returned to the baseline level 24 hours post IABP removal (P>0.05). Three patients in Group A and 2 patients in Group B developed minor limb ischemia (P>0.05). No major limb ischemia in either group. Two patients in Group A suffered major bleeding and required blood transfusion or surgical intervention, whereas no patient had major bleeding in Group B. Eight patients had minor bleeding in Group A, but only 2 patients in Group B (P<0.05). No clot deposit developed on IABP surface in either group. CONCLUSION: IABP is safe without routine anticoagulation therapy. Selecting appropriate artery approach and early detection intervention are key methods for preventing complications.     

钢筋混凝土偏心受压柱反张法加固技术

提出了对钢筋混凝土偏心受压柱进行反张法加固的具体措施和技术要求，经验证可以应用于工程．     

我国东部沿海地区黑腹果蝇醇脱氢酶座位的多态性和渐变群研究

应用标准琼脂糖平板电泳技术,对我国东部沿海地区9个地方黑腹果蝇自然群体的醇脱氢酶座位的等位基因频率进行了测定。结果发现,在全部的群体中,该座位皆是多态的,且基因频率表现出纬度渐变群分布。还对这种多态性和渐变群形成的可能机理进行了讨论。     

钢筋混凝土T形圆孔梁受力性能的研究与设计

本文在钢筋混凝土T形圆孔梁试验的基础上,分析了影响T形圆孔果受力性能的主要因素,并提出了圆孔梁上下弦杆剪力分配及抗剪强度计算公式的建议。计算结果与试验数据符合较好。     

结肠双腔造瘘术式的改进在腹盆腔肿瘤中的应用体会

目的:总结结肠双腔造瘘术式的改进在腹盆腔肿瘤临床应用中的经验.方法:对52例行结肠双腔造瘘不同术式的临床资料进行回顾性分析.结果:腹腔镜下行结肠双腔造瘘4例,经腹结肠双腔袢式造瘘36例,经腹结肠双腔单口造瘘8例,改良结肠双腔单口造瘘4例,无造瘘口缺血坏死并发症.结论:腹腔镜下结肠造瘘优点明显应多加推广;经腹结肠双腔单口造瘘可取代传统的经腹结肠双腔袢式造瘘,改良结肠双腔单口造瘘可用于无需进腹探查的结肠造瘘者.     

偏心构件受压计算分析

采用有限元法对钢筋混凝土偏心受压构件进行内力分析,通过算例对双向偏心受压和单向偏心受压两种计算方法进行了比较,并得出相应结论。