经尺骨鹰嘴截骨入路双钢板治疗肱骨髁间骨折

[目的]探讨经尺骨鹰嘴截骨入路应用肱骨内、外髁解剖钢板治疗肱骨髁间骨折的方法和临床疗效。[方法]2002年7月-2006年3月采用经尺骨鹰嘴截骨入路结合肱骨内、外髁解剖钢板治疗肱骨髁间骨折26例，男19例，女7例；年龄15-46岁，平均35岁。按照Riseborough和Radin的分类方法，Ⅱ型6例，Ⅲ型18例，Ⅳ型2例。[结果]术后25例骨折复位满意，1例复位稍差，无切口感染，1例术中牵拉损伤尺神经，22例获得随访，时间6～19个月，平均13．5个月。尺神经损伤恢复，骨折全部愈合，无内固定松动及断裂，愈合时间14～24周，平均17周。根据改良的Cassebaum评分系统评价肘关节功能，其中优5例，良13例，可3例，差1例，优良率81．8％。[结论]经尺骨鹰嘴截骨入路显露骨折充分，肱骨内、外髁解剖钢板固定肱骨髁间骨折牢固可靠，能有效的防止骨折不愈合，并可满足患者早期进行关节功能锻炼。     

经输尿管镜钬激光碎石治疗输尿管结石

目的探讨经输尿管镜钬激光碎石治疗输尿管结石的临床效果. 方法 90例输尿管结石,经尿道、膀胱置入10°输尿管镜抵达结石处,将光纤头直抵结石,设置工作能量0.8～1.5 J,频率8～10 Hz,采用连续脉冲方式粉碎结石. 结果3例进镜失败(输尿管镜无法到达结石部位)改开放手术,1例输尿管穿孔改开放手术;86例碎石成功,单次钬激光碎石成功率为95.6%(86/90).手术时间30～80 min,平均55 min.术后住院1～5 d,平均2.5 d.86例随访1～3个月,69例病程＜6个月、肾积水＜4 cm,肾积水完全消失;17例病程＞6个月、肾积水＞4 cm,术后患肾均有不同程度积水,但较术前明显改善. 结论经输尿管镜钬激光碎石治疗输尿管结石效果理想,创伤小,并发症少,可作为输尿管中、下段结石的首选治疗方法.     

眶骨延长术治疗眼球突出的实验研究

目的探讨眶骨延长术扩大眶容积治疗眼球突出的可行性。方法1年龄山羊6只,环行截开右侧眶壁,于眶上壁放置延长器,侧向延长1.5cm,经大体、X线、干骨标本及组织学观察成骨情况。结果6只山羊眶骨得到不同程度的侧向延长,延长侧随着眶骨容量的增加,眼球突度较自身对照侧为小。结论眶骨延长术可造成山羊眶骨侧向移位,有可能成为治疗眼球过度突出的方法之一。     

局域网在医院感染管理中应用的初步设想

[目的]利用医院局域网对医院感染进行实时监控，提高工作效率。[方法]采用Windows98平台，应用Access建立数据库，进行感染监控。[结果]局域网使用方便、操作简单，使医院感染监控及时、准确。[结论]利用医院局域网对医院感染可进行实时性监控，减轻了医护人员和专职人员的工作量，提高了工作效率。     

内固定与带血管髂骨块治疗青壮年股骨颈骨折

[目的]探讨内固定与带旋髂深血管蒂髂骨块移植治疗青壮年股骨颈骨折的手术方法及临床疗效.[方法]对15例青壮年股骨颈骨折行切开复位,空心螺钉或HDS内固定并同时切取带旋髂深血管蒂的髂骨块转位移植.[结果]15例均获随访,随访时间平均2 a 5个月,骨折全部愈合,1例发生股骨头缺血坏死.[结论]内固定加带旋髂深血管蒂髂骨块转位移植是治疗青壮年股骨颈骨折的最佳手术方式.     

Simultaneous assessment of cardiac perfusion and function using 5-dimensional imaging with Tc-99m teboroxime

BACKGROUND: Dynamic single photon emission computed tomography (SPECT) acquisition and reconstruction of early poststress technetium 99m teboroxime washout images has been shown to be useful in the detection of coronary disease. Assessment of poststress regional wall motion may offer additional use in assessing coronary disease. Our goal was to investigate the feasibility of simultaneously imaging myocardial ischemia and transient poststress akinesis using gated-dynamic SPECT. METHODS AND RESULTS: A gated-dynamic mathematical cardiac torso (MCAT) phantom was developed to model both teboroxime kinetics and cardiac regional wall motion. A lesion was simulated as having delayed poststress teboroxime washout together with a transient poststress wall motion abnormality. Gated projection data were created to represent a 3-headed SPECT system undergoing a total rotation of 480 degrees . The dynamic expectation-maximization reconstruction algorithm with postsmoothing across gating intervals by Wiener filtering, and the ordered-subset expectation maximization reconstruction algorithm with 3-point smoothing across gating intervals were compared. Compared with the ordered-subset expectation maximization with 3-point smoothing, the dynamic expectation-maximization algorithm with Wiener filtering was able to produce visually higher-quality images and more accurate left ventricular ejection fraction estimates. CONCLUSION: From simulations, we conclude that changing cardiac function and tracer localization possibly can be assessed by using a gated-dynamic acquisition protocol combined with a 5-dimensional reconstruction strategy.     

Expression, purification and molecular modeling of recombinant fibrinogenase [IV], a metalloproteinase from Deinakistrodon acutus venom.

A novel metalloproteinase, recombinant fibrinogenase IV (rFIV(a)), was expressed and purified from Deinakistrodon acutus venom. It was a single chain protein with an apparent molecular weight 27 kDa and an isoeletric point of pH 7.1. RFIV(a) cleaved preferentially the Aalpha-chain and also cleaved Bbeta, gamma-chains of fibrinogen when the incubation time was prolonged. The proteolytic activity was inhibited by EDTA, l-cysteine, and DTT, indicating rFIV(a) was a metalloproteinase requiring disulfide bonds for its activity. It kept above 85% of the initial activity from pH 4.5-11, showed an equal maximum activity at the temperature range from 30 to 50 degrees C, and was inactivated by Zn2+, Cu2+ and Cd2+. Homology modeling of rFIV(a) showed that two highly conserved disulfide bonds (Cys159-Cys164 and Cys117-Cys197) was maintained from its structure, and it exhibited the characteristic conserved motif H142E143XXH146XXGXXH152, whose three histidine residues were involved in binding of the catalytically essential zinc ion. This work demonstrates the expression, purification and characterization of recombinant fibrinogenase IV, which belongs to class P-I metalloproteinase from D. acutus venom.     

老年患者不稳定性股骨转子间骨折的术式选择

目的探讨不同的内固定方式在老年患者不稳定性股骨转子间骨折治疗中的应用。方法参照Evans分型,85例老年患者股骨转子间骨折,不稳定性77例,稳定性8例,分别应用不同内固定治疗,其中Gamma钉20例、重建钉25例、动力髋部螺钉(DHS)和动力髁部螺钉(DCS)40例。结果术后随访79例,均获得骨折愈合,愈合时间4～7个月,平均5.2个月,其中大于5°髋内翻者有12例。根据患者骨折愈合、关节活动、主观感觉与生活能力恢复等因素制定疗效评定标准,优良率为84.8%(67例)。未发生因本手术所致内科合并症加重或患者死亡。结论髋内翻是老年患者不稳定性股骨转子间骨折内固定术后的主要并发症。Evans分型对选择内固定具有指导意义。结合老年患者骨质疏松情况,针对不同骨折类型选用适当的内固定器械,可以提高不稳定性转子间骨折的疗效。     

锌指蛋白A20 RNAi载体的构建及筛选

目的我们前期的实验结果显示A20 mRNA和蛋白在人脑胶质瘤组织及细胞系（U251、U87、BT325）中高表达，本研究拟构建A20RNAi载体，并检测其对U251细胞A20表达的抑制作用。方法构建三种针对人A20基因的真核干涉表达载体，以脂质体法将其分别转染人脑胶质瘤细胞系U251，以RT-PCR、蛋白印迹法检测各干涉载体对U251细胞中A20mRNA和蛋白表达的抑制作用。结果成功构建三种针对A20基因的RNAi载体，经RT-PCR、蛋白印迹检测筛选出对A20基因干涉效果最佳的载体，命名为pSilencer3．1-A20R1。结论成功构建A20基因干涉载体，为进一步探讨A20与脑胶质瘤恶性增殖、血管形成以及抗凋亡的关系奠定实验基础。     

软组织血管瘤16层螺旋CT血管成像诊断

目的探讨软组织血管瘤多排CT血管成像的影像表现方法回顾性分析临床、手术及病理证实20例软组织血管瘤CT平扫、增强和CT血管成像的不同表现结果CT平扫病灶呈软组织密度,5例灶内或灶缘见斑点状或斑块状高密度钙化灶;20例增强后病灶血管成像呈不同表现,12例动脉期瘤体内呈网状血管强化并见明显的瘤体供血动脉,其中单支供血动脉4例,2支以上多支供血动脉8例,供血动脉较对侧明显增粗瘤体内明显迂曲静脉血管6例,而静脉期瘤体表现为网状血管阴影强化8例病变动脉期瘤体不强化或仅轻微强化,且无明显供血动脉参与供血,静脉期瘤体逐渐均匀一致强化结论软组织血管瘤的多排螺旋CT血管成像可清晰显示软组织血管瘤的形态、大小、供血血管