管状骨增宽牵引成骨组织形态学变化的实验研究

目的 探讨管状骨增宽牵引后新骨形成的变化。方法 在成年山羊的后肢放置2只增宽牵引器。实验组9只术后第8天牵引，对照组3只不牵引。牵引完毕后不同时期，各宰杀3只，评价管状骨增宽牵引后新骨形成的质和量。结果 实验组胫骨平均增宽7．83mm，X射线见牵引间隙逐渐变模糊，暴露侧有骨不连，非暴露侧成骨良好，牵引完毕3个月，未暴露侧新形成板层骨与原来胫骨融为一体，而暴露侧骨不连区为致密纤维组织。结论 管状骨增宽牵引成骨后，两侧牵引间隙成骨不一致，良好的血供，对新骨形成至关重要。     

Link protein shows species variation in its susceptibility to proteolysis.

Human cartilage link protein exists as three native components, while equine, bovine, and porcine cartilage link protein exist as two and Swarm rat chondrosarcoma link protein exists as only one component. These nonhuman link protein components represent intact protein structures, and there is little evidence for proteolytically modified forms in nonhuman tissues. In human cartilage, the proteolytic production of modified link proteins increases with age, whereas high amounts of such products were not seen in the nonhuman tissues. However, the small amounts of link protein fragments that were observed in the nonhuman cartilages were of a similar size to their human counterparts. On digestion of human proteoglycan aggregate with stromelysin, rapid modification of the link protein components occurred, whereas the aggregates from nonhuman cartilages showed incomplete cleavage of their link protein components. The relative resistance of nonhuman link protein to stromelysin may in part be due to a unique amino acid substitution present near the enzymic cleave site.     

改善微循环对大鼠坐骨神经损害血管内皮细胞生长因子表达及病理改变的影响

目的:探讨改善微循环对周围神经嵌压性损害血管内皮细胞生长因子(VEGF)表达和病理改变的影响。方法:分别检测坐骨神经嵌压后12、72h和7d背根神经节细胞VEGF水平与第4周神经干、神经节病理变化、脊髓病变神经元计数等,并运用正常对照组、模型组、前列地尔组和丁咯地尔组采用SPSS10.0统计软件进行方差分析统计处理。结果:嵌压后72hVEGF水平达到高峰,与正常对照组比较,其余各组均显著增加(P<0.01,P<0.05);前列地尔组和丁咯地尔组较模型组为优(P<0.01,P<0.05);嵌压后4周前列地尔组和丁咯地尔组的神经干、神经节病理变化、脊髓病变神经元计数均优于模型组(P<0.05)。结论:对于周围神经嵌压性损害,改善微循环可增加VEGF的表达并减轻其病理损害,从而对周围神经嵌压性损害的修复具有促进作用。     

Detecting possible vaccine adverse events in clinical notes of the electronic medical record

The Vaccine Safety Datalink (VSD) is a collaboration between the CDC and eight large HMOs to investigate adverse events following immunization through analyses of clinical data. We modified an existing system, called MediClass, that uses natural language processing to identify clinical events recorded in electronic medical records (EMRs). We customized MediClass so it could detect possible vaccine adverse events (VAEs) generally, and gastrointestinal-related VAEs in particular, in the text clinical notes of encounters recorded in the EMR of a large HMO. Compared to methods that use diagnosis and utilization codes assigned to encounters by clinicians and administrators, the MediClass system can both find more adverse events and improve the positive predictive value for detecting possible VAEs.     

汶川地震陇南灾区伤情调查与分析

目的：调查分析汶川地震甘肃陇南伤情情况，进一步讨论如何采取措施应对突发灾害。方法：采用问卷调查、访谈等方法，对甘肃陇南地震受灾人口进行抽样调查，重点对伤员伤情、致伤原因、救治方法进行统计学分析。结果：在此次地震伤抽样调查中共有1652例，死亡16例，四肢骨折患者750例，占45．4％，精神、神经方面40例，占2．4％。通过有组织的及时救助伤员，减少了并发症的发生，降低了死亡率。结论：加强地震伤的预防与救治，从而有效地减少致死率和致残率。     

胸腺肽α1对神经外科肿瘤患者T淋巴细胞亚群和NK细胞的影响

目的了解胸腺肽α1对神经外科肿瘤患者围术期T淋巴细胞亚群和自然杀伤(NK)细胞数量的影响。方法选择30例神经外科肿瘤手术的患者,随机均分为研究组和对照组,研究组麻醉前用胸腺肽α1,对照组未使用。分别于麻醉前、手术1 h、术毕和术后5 d抽取外周静脉血,用流式细胞仪检测T淋巴细胞亚群(CD3 、CD4 、CD8 )和NK细胞(CD56 )数量的变化。结果研究组和对照组手术1 h CD3 、CD4 、CD4 /CD8 、NK细胞数量均较麻醉前明显下降(P<0.05或P<0.01),研究组下降幅度较对照组小(P<0.05),术毕研究组和对照组各指标有所回升,但研究组回升的幅度较对照组大,术后5 d研究组和对照组各指标均回到麻醉前水平。结论胸腺肽α1减小了神经外科肿瘤患者围术期T淋巴细胞亚群和NK细胞下降的程度,能明显减轻细胞免疫功能的抑制。     

体外细胞培养检验“方证对应”关系的方法学研究

目的通过在体外细胞培养中加入中药复方粗提制剂对具有典型的中医证型的肺癌患者的外周血淋巴细胞NK活性的影响，探索能否在体外实验中反映“方证对应”关系。方法以水煎醇沉法制备两种中药复方（益气养阴和健脾化痰）的粗提制剂，取具有典型的中医证型（气阴两虚或脾虚痰湿证型）的肺癌患者的外周血淋巴细胞，将同一个患者的标本分为四个体外实验组，即空白对照组，中药5mg／ml组及10mg／ml组，自细胞介素2（250^u/ml，阳性对照）组。按“辨证论治”原则加入相应的中药复方制剂。体外培养22h或94h，以MTT法检测各组的NK活性。结果无论培养22h或94h，中药组的NK活性与对照组比较皆无显著性差异（P〉0．05），而白细胞介素2（阳性对照）组的NK括性均明显升高（P〈0．05）。结论两种中药复方制剂都未能在体外反应出“方证对应”的效果，说明中药粗提制剂直接用于体外细胞培养，其结果的可靠性差。     

Scale-up of Adhesive Transdermal Drug Delivery Systems

Pharmaceutical Research -