医用电子产品的电气安全检测

医用电子技术在不断变化，为提高检测过程的工作效率．医用电子产品的电气安全检测技术也在相应发展．发展的总方向离不开检测综合化和自动化。     

Comparison of fMRI statistical software packages and strategies for analysis of images containing random and stimulus-correlated motion.

The objectives of this study were to use computer-generated phantoms containing real subject motion to: (1) compare the sensitivity of four commonly used fMRI software packages and (2) compare the sensitivity of three statistical analysis strategies with respect to motion correction. The results suggest that all four packages perform similarly in fMRI statistical analysis with SPM2 having slightly higher sensitivity. The most sensitive analysis technique was to perform motion correction and include the realignment parameters as regressors in the general linear model. This approach applies to all four packages examined and can be most beneficial when stimulus-correlated motion is present.     

葡萄籽多酚对多药耐药的逆转作用及其机制

目的：探讨葡萄籽多酚(GSPs)逆转多药耐药的作用及其对多药耐药相关蛋白GSTπ、TopoⅡ α表达的影响。方法：以人乳腺癌MCF-7细胞及其耐药株MCF-7／ADR细胞作为实验对象，用MTT法观察GSPs对多药耐药的逆转作用，免疫细胞化学技术观察GSPs对GSTπ、TopoⅡα等多药耐药相关蛋白表达的影响。结果：GSPs在1．2、2．4mg／L浓度时对细胞无毒性作用，并且均能逆转MCF-7／ADR细胞的多药耐药性，逆转倍数分别为5．77和9．79倍；GSPs可使MCF-7／ADR细胞GSh表达下降，但对TopoⅡ α表达无影响。结论：体外试验证实GSPs具有多药耐药逆转作用，其机制可能与降低肿瘤细胞内GSTπ的表达有关，提示GSPs是一种潜在的肿瘤化疗增敏剂。     

Innervation of the trapezius muscle: is cervical contribution important to its function?

OBJECTIVE: To study the effect of the cervical plexus and the accessory nerve to the function of the trapezius muscle. STUDY DESIGN AND SETTING: Eighteen adult male Sprague-Dawley rats were randomly divided into three groups. The neurotomies were performed in the left sides and the right sides served as within-subject controls. In group A, the accessory nerve was transected. The C2-5 were transected in group B, and both of the accessory nerve and C2-5 were cut in group C. The electrophysiologic, myophysiologic, and histologic changes of the muscles were measured. RESULTS: There were significant differences (P < 0.05) between the three groups in the recovery rates of the transverse area of the muscles. The CMAP recorded from the experimental sides in group B were similar to the control sides. The values of the maximum tension of the tetanus contraction between the two sides showed no differences either (P > 0.05). CONCLUSION: The accessory nerve supplies the most important motor input to the trapezius. Motor innervations of the cervical plexus are not very significant.     

立体定向技术治疗癫痫性精神病的体会

目的：探讨多靶点组合对癫痫性精神病的治疗效果。方法：采用立体定向技术，运用多元化定位和多靶点组合，射频热凝脑内核(团)治疗癫痫性精神病53例。术前、术后均进行总疗效评定量表(GAS)和癫痫的国际疗效评价进行疗效评定。结果：53例中显效37例，进步16例。结论：双侧胼胝体、杏仁核、内侧隔区及单侧红核前区多靶点组合治疗，对癫痫性精神病的治疗有明显作用。     

头孢噻肟钠聚合物测定实验条件的改进

目的:对中国药典收载的头孢噻肟钠聚合物测定条件进行改进。 方法 :采用高效液相色谱法 ,以Sephadex G- 10色谱柱 4 2 cm× 1.3cm对 6批样品进行分析 ,分别进样 5 0μl和 2 0 0μl,按外标法计算聚合物的量。结果:头孢噻肟钠在 10～ 6 0 μg/m l范围内线性关系良好 (r=0 .9995 ) ,高中低浓度的加样回收率分别为 10 0 .2 %、10 0 .4 %、99.7% ;RSD分别为 1.7%、1.5 %、1.9% (n =3)。该方法与药典方法比较 ,差异无统计学意义 (P >0 .0 5 )。 结论:本方法简便、快速、可行 ,具有实用价值     

肱骨干骨折内固定的选择及应注意的问题

目的正确选择肱骨干骨折手术内固定.方法对107例肱骨干骨折分别进行交锁髓内钉(34例)、加压钢板(29例)、Y型钢板(38例)、螺钉(6例)等内固定,并随访比较分析. 结果所有病例均得到随访,平均随访6.3个月.交锁髓内钉、螺钉内固定组全部愈合;加压钢板内固定组愈合26例,伴桡神经损伤2例;Y型钢板内固定组全部愈合,伴肘关节僵硬2例. 结论根据肱骨干骨折的部位和类型选用适当的内固定方法,骨折愈合良好,可有效的减少并发症的发生.