不同持续时间的周期性压力对构建组织工程软骨的影响

Objective To determine the best duration for exerting the cyclic pressure under which the tissue-engineered cartilage is constructed. Methods Free chondrocytes isolated from rabbit articular cartilage were seeded into polylactic acid-co-glycolic acid(PLGA) scaffolds after expansion in vitro, and ran-domized into 4 groups. In Groups 1 to 3, chondrocytes were cultured under daily cyclic pressure (0 ～ 200 kPa, 0.1Hz) for 4 hours, 8 hours, 12 hours respectively; Group 4 was a control in which no pressure was exerted. In each group, after 2 weeks of culture, the tissue engineered cartilages were observed in vitro and assessed by his-tological staining of liE. Next, the content of DNA and the secretion of type Ⅱ collagen and GAG in cartilages were detected quantitatively. Results Under the daily cyclic pressure (0 ～200 kPa, 0.1 Hz), the scaf-fold-chondrocytes complex in the group of 8 hours got the largest volume, smooth, lucidus, and elastic surface, the most queuing chondrocytes, and the highest content of type Ⅱ collagen and GAG (P < 0.01). Conclusions Since chondrecytes are baro-senstive, the metabolism of chondrocytes can be affected by the time of cyclic pressure. Under the effect of 0 ～200 kPa, 0.1Hz, the daily cyclic pressure of 8 hours may be optimal for chondrocytes to multiply and synthesize extracellular matrixes such as type Ⅱ collagen and GAG.     

自拟益气活血汤治疗心力衰竭30例

笔者自2000年以来，自拟益气活血汤，治疗充血性心力衰竭30例，疗效满意，现报告如下。     

试论荣辱观在大学生思想政治教育中的作用

胡锦涛同志在全国加强和改进大学生思想政治教育工作会议的讲话中指出,要使大学生成长为中国特色社会主义事业的合格建设者和可靠接班人,不仅要大力提高他们的科学文化素质,更要大力提高他们的思想政治素质。本文就社会主义荣辱观在大学生思想政治教育的理想信念教育,爱国主义教育,思想道德教育以及大学生全面发展教育中的作用进行了论述。     

利多卡因与缩宫素及安定合用对产程的影响

目的：进一步探讨促进产程进展的方法。方法：选100例产妇分为研究组与对照组，研究组60例给予宫颈注射利多卡因，静脉滴注缩宫素，静脉推注安定；对照组40例仅用缩宫素静滴，比较两组对产程的影响。结果：研究组产程平均为7.05h，对照组为8．117h（P〈0．01）。结论：本方法促产程进展较单纯缩宫素静脉滴注效果显著。     

吡嗪酰胺致高尿酸血症对关节痛的影响

吡嗪酰胺(PZA)为强化抗痨治疗中的主要药物,副作用以血清尿酸(UA)升高、关节痛较常见。现将血清尿酸升高及其临床表现分析如下。1资料与结果分析1.1临床资料2002年1月~2004年5月在我院结核科确诊为肺结核、结核性胸膜炎的住院患者114例,男104人,女1人。年龄18~40岁97例,41~59岁7例,60~79岁9岁,88岁1例。采用抗痨方案2~3HRZE(S)/4~6HRE,强化期均含PZA,口服剂量1.5gl/日(视体重增减剂量),60岁以上老人075~1.0克1/日。1.2尿酸检测结果用药前晨查UA为289.4±60.2umolL;抗痨治疗1月时复查血清UZ为595.2±121.3umol/L,强化结束,停用PZA1…     

微置元素与动脉粥样硬化

本文综述了铁、铜、锌、铬、硒、锰、锗与动脉粥样硬化(AS)的关系,表明微量元素与AS密切相关,为攻克AS提示了一条新路.     

自拟复元通络汤治疗股骨头无菌性坏死的疗效观察

股骨头无菌性坏死目前发病率较高，男性明显多于女性，发病原因大多与大量饮酒、刨伤、长期或大量服用糖皮质激素、中老年人锻炼过当，活动量过大，或伴有其他营养不良性疾病等因素有关。     

肺表面活性物质与细菌性肺炎

对于肺表面活性物质(PS)的研究长期以来主要集中在急性呼吸窘迫综合征(ARDS)和新生儿呼吸窘迫综合征(NRDS)方面，而在细菌性肺炎等方面的研究较少。在细菌性肺炎中发现PS减少，活性降低，提示两者之间存在着一定的关系。本文就PS与细菌性肺炎的关系作一综述，以便为细菌性肺炎的治疗提供新的思路。