加热及增加细胞内氧自由基水平对恶性胶质瘤细胞生物学特性的影响

本文就加热及同时增加细胞内氧自由基水平对恶性胶质瘤细胞存活、增殖和细胞间隙连结通讯的影响做初步观察。用Ｍ．Ｔ．Ｔ法测定胶质瘤细胞存活率；用Ｋｉ－６７抗增殖细胞核抗原单克隆抗体，通过免疫组织化学ＡＢＣ染色分析胶质瘤细胞的增殖活性；用划痕染料示踪技术观察胶质瘤细胞的细胞间隙连结通讯。结果表明，Ｈ２Ｏ２和３ＡＴ能增强加热对胶质瘤细胞存活与增殖的抑制作用，促进胶质瘤细胞间隙连结通讯的改善，存在着明显的剂量和时间效应。实验结果提示，通过内外源性增加胶质瘤细胞内的氧自由基水平，将有助于强化加热治疗胶质瘤效果，并可以减少加热的剂且，降低副作用。     

经皮弧式椎间盘切除器械治疗腰5骶1椎间盘突出症初步报告

采用经皮弧式椎间盘切除器械治疗Ｌ_５～Ｓ_１椎间盘突出症２２例，２１例成功。术后优良率为８６．４％。该器械能够避开髂嵴阻挡进入Ｌ_５～Ｓ_１椎间隙，并增加椎间盘切除量，提高经皮Ｌ_５～Ｓ_１椎间盘切除成功率。定位正确是成功的关键。     

正常人口腔粘膜不同部位表面感觉的测试

目的 建立正常人口腔粘膜不同部位表面感觉的正常参考值，并测试各年龄组感觉值是否存在差异。方法 利用动静两点辨别觉试验，测试90例健康人口腔粘膜不同部位的表面感觉。结果 舌尖感觉功能最好，其次为舌背、舌腹、颊粘膜、口底和硬腭。健康人的口腔粘膜不同部位的表面感觉随着年龄增长有显著性变化。结论 口腔粘膜不同部位感觉辨别力存在差异，健康人口底、舌腹、舌背、颊和硬腭粘膜感觉功能有增龄性变化。     

Effect of unilateral bite splint on mastication in the miniature pig

Unilateral premature occlusal contacts are known to alter masticatory activity levels during clenching, but whether natural chewing is similarly affected is not known. The purpose of this study was to analyse the effects of a unilateral bite splint on mastication. Eleven experiments were carried out using three miniature pigs. Electromyography of the masticatory muscles and movements of the jaw were recorded during natural chewing before and after inserting a bite splint on the second and third deciduous premolars. In contrast to human clenching, the integrated activities of the jaw-closing muscles increased, especially on the contralateral side. The increases were mainly due to the prolongation of the burst durations. Jaw opening activity was increased as well. The frequency of mastication fell slightly and the animal preferred to chew food on the bite splint side. These results demonstrate the importance within the particular experimental conditions of the occlusal condition in regulating chewing behaviour.     

光动力学疗法与局部化疗联合治疗进展期食管贲门癌

作应用光动力学疗法（ＰＤＴ）对进展期食管贲门癌５５例进行治疗，并对其中１５例联合应用内镜下局部注射抗癌药物。对每一患均先静脉滴注血卟啉衍生物（ＨＰＤ）５ｍｇ／ｋｇ，于用药后２４，４８和７２ｈ分别用波长６３０ｎｍ的铜蒸汽激光照射肿瘤部位。联合治疗组除ＰＤＴ治疗外，于每次光照前肿瘤局部注射５－Ｆｕ２５０～５００ｍｇ。结果：联合治疗组的近期显效率高于单纯ＰＤＴ组（Ｐ〈０．０５）。病例随访６～１６月，     

鼻咽癌增强CT扫描的影像表现及价值(附102例报告)

目的　探讨鼻咽癌 (NPC)增强CT表现和价值。方法　对 10 2例NPC放化疗前病人行平扫加增强扫描 ,观察癌灶密度变化、鼻咽表面线样强化层和癌灶周界情况。结果　平扫癌灶密度与同层面鼻咽肌相近的有 89例 (87% ) ,其余与翼外肌相近(13 % )。平扫难以明确癌灶的大小和范围 ,所能显示的仅是有无占位。增强扫描癌灶密度差异明显的占 44% ,单靠密度差异能使其周界全部或大部清楚的仅占 40 %。根据癌灶强化和线样强化层的表现 ,综合判断癌灶周界全部或大部清楚的达到 76%。结论　增强扫描对准确判断NPC癌灶的大小、范围以及对发现小的癌灶和鉴别诊断有重要作用。在主要针对鼻咽部本身的检查 ,增强也应列为常规扫描     

输尿管硬镜处理复杂肾结石残余结石

目的：提高复杂肾结石的治疗水平。方法：采用输尿管硬镜在术中从肾实质切口，术后从肾造接口取肾内残余结石。结果：5例手术中取石，4例取净；11例手术后取石，其中3例一次取石，5例二次取石，3例三次取石，7例取净。结论：复杂肾结石术中、术后配合输尿管硬镜取石可有效处理残余结石。     

267株烧伤感染细菌的调查分析

目的：回顾性分析1995年1月至2003年12月间本院烧伤科细菌分布和菌种耐药情况，以指导临床合理用药。方法：收集烧伤病人创面分泌物、血液、痰液及静脉导管末端行普通细菌培养，统计细菌分布情况及常用药物的敏感性。结果：9年来共检出19种267株细菌．其中铜绿假单胞菌和金黄葡萄球菌占83．14％，并有逐渐增加的趋势。铜绿假单胞菌以亚胺培南、头孢哌酮／舒巴坦和多粘菌素B最敏感；氨曲南亦较敏感，且敏感性呈逐渐上升趋势。金黄色葡萄球菌以万古霉素最敏感．呋喃妥因、利福平次之，青霉素类和大部分头孢菌素则高度耐药。结论：目前烧伤感染仍以铜绿假单胞菌和金黄色葡萄球菌为主．防治该两种细菌感染是抗烧伤感染的主要任务。     

hCG/ATP-induced Leydig cell calcium channel reaction at different extracellular calcium ion concentration

Objective: To study the calcium channel reaction of human Leydig cells induced by hCG/ATP at different extracellular calcium ion concentrations. Methods: The Leydig cell calcium ion concentration was examined with laser confocal microscope, when the cells were stimulated with hCG/ATP at different extracellular calcium contrations. Results: With calcium-containing extracellular fluid, the Leydig cells were sensitive to hCG stimulation and when the extracellular fluid was calcium-free, the Leydig cells did not respond to the stimulation. However, the Leydig cells did respond to ATP stimulation no matter the extracellular fluid contained calcium or not. Conclusion: In human Leydig cells, there are calcium channels sensitive to hCG and ATP. The extracellular calcium ion concentration plays an important role in the regulation of Leydig cell metabolism by hCG/ATP.