推拿对颈椎病患者外周血中TNF-α的影响

目的探讨推拿对颈椎病患者外周血中TNF-α的影响。方法将100例颈椎病患者随机分成推拿组40例、颈舒片组30例和塞来昔布组30例。推拿组采用推拿疗法,颈舒片组采用口服颈舒片,塞来昔布组采用口服塞来昔布。连续治疗14天为1疗程。观察TNF-α水平的变化及SF-MPQ评分变化。结果治疗前3组患者TNF-α水平比较,差异无显著性(P>0.05);治疗后3组TNF-α水平与治疗前比较均明显下降(P<0.05)。治疗后推拿组TNF-α水平与颈舒片组或塞来昔布组比较,差异有显著性(P<0.01)。结论推拿比口服颈舒片或塞来昔布更好地降低TNF-α的水平,对颈椎病患者疼痛有明显干预作用。     

The occurrence of diffuse axonal injury in the brain：associated with the accumulation and clearance of myelin debris

The accumulation of myelin debris may be a major contributor to the inlfammatory response after diffuse axonal injury. In this study, we examined the accumulation and clearance of myelin debris in a rat model of diffuse axonal injury. Oil Red O staining was performed on sections from the cerebral cortex, hippocampus and brain stem to identify the myelin debris. Seven days after diffuse axonal injury, many Oil Red O-stained particles were observed in the cerebral cortex, hippocampus and brain stem. In the cerebral cortex and hippocampus, the amount of myelin debris peaked at 14 days after injury, and decreased signiifcantly at 28 days. In the brain stem, the amount of myelin debris peaked at 7 days after injury, and decreased signiifcantly at 14 and 28 days. In the cortex and hippocampus, some myelin debris could still be observed at 28 days after diffuse axonal injury. Our ifndings suggest that myelin debris may persist in the rat central ner-vous system after diffuse axonal injury, which would hinder recovery.     

Deformable segmentation via sparse representation and dictionary learning

“Shape” and “appearance”, the two pillars of a deformable model, complement each other in object segmentation. In many medical imaging applications, while the low-level appearance information is weak or mis-leading, shape priors play a more important role to guide a correct segmentation, thanks to the strong shape characteristics of biological structures. Recently a novel shape prior modeling method has been proposed based on sparse learning theory. Instead of learning a generative shape model, shape priors are incorporated on-the-fly through the sparse shape composition (SSC). SSC is robust to non-Gaussian errors and still preserves individual shape characteristics even when such characteristics is not statistically significant.Although it seems straightforward to incorporate SSC into a deformable segmentation framework as shape priors, the large-scale sparse optimization of SSC has low runtime efficiency, which cannot satisfy clinical requirements. In this paper, we design two strategies to decrease the computational complexity of SSC, making a robust, accurate and efficient deformable segmentation system. (1) When the shape repository contains a large number of instances, which is often the case in 2D problems, K-SVD is used to learn a more compact but still informative shape dictionary. (2) If the derived shape instance has a large number of vertices, which often appears in 3D problems, an affinity propagation method is used to partition the surface into small sub-regions, on which the sparse shape composition is performed locally. Both strategies dramatically decrease the scale of the sparse optimization problem and hence speed up the algorithm. Our method is applied on a diverse set of biomedical image analysis problems. Compared to the original SSC, these two newly-proposed modules not only significant reduce the computational complexity, but also improve the overall accuracy.     

药物洗脱支架的药物装载方式及应用

背景:药物释放动力学不理想、高分子载体引起的后期血栓和涂层完整性破坏等是目前药物洗脱支架面临的主要问题.要从根本上解决这些问题,就需要改变支架上药物的装载方式,包括药物和载体的选择以及药物涂层的制备工艺.目的:讨论目前药物洗脱支架的药物装载方式,探索其可能的发展方向.方法:应用计算机检索Elsevier、ACS和Springerlink数据库中2000-03/2010-01关于药物洗脱支架涂层的文章,在标题中以"stent;drug;coating"为检索词进行检索.选择文章内容与药物洗脱支架涂层有关者,同一领域文献则选择发表在权威杂志的文章.初检得到445篇文献,根据纳入标准选择关于药物洗脱支架涂层制备的31篇文章进行综述.结果与结论:目前研究的药物洗脱支架涂层按照药物与其载体间的结合方式可分为物理装载,静电吸附和化学键合.文章分别讨论了不同体系的药物、载体、涂层制备、释放动力学和降低再狭窄效果,指出不同的药物根据其自身的生物、物理和化学性质,可以选择合适的载体和改变涂层制备工艺,从而达到相对理想的释放动力学.另外还展望了药物洗脱支架涂层的未来发展方向,有望为该领域提供新的思路和方法.     

改良混合痔切除术的临床研究

为探讨改良混合痔切除术的临床疗效，本研究将40例重度混合痔患者随机分为两组，一组予改良混合痔切除术（治疗组）治疗，一组予传统外剥内扎术（对照组）治疗，对比分析两组患者疗效、术后并发症、创面愈合时间、药比、住院费用、住院时问及患者满意度。结果显示，两组疗效、创面愈合时间、药比及肛门狭窄和尿潴留方面差异均无统计学意义，P〉0．05；但在住院费用、住院时间、患者满意度及后遗皮赘、肛缘水肿、创面出血、术区疼痛方面差异有均统计学意义，P〈0．05，且治疗组优于对照组。结果表明，改良混合痔切除术治疗重度混合痔疗效确切，术后并发症少，不影响肛门功能和外观，患者满意度高，值得临床推广。     

马鞍山市小黄洲村移民建镇后血吸虫病疫情变化分析

1998年洪涝灾害后，根据国务院“退田还湖、移民建镇”的精神，马鞍山市政府决定对血吸虫病重流行区小黄洲村实施整体搬迁安置。为准确掌握小黄洲村移民建镇后对血吸虫病流行的影响，2002～2004年对小黄洲村开展了血吸虫病流行病学现场调查。