岩藻聚糖硫酸酯FV对大鼠的抗血栓作用研究

目的探讨岩藻聚糖硫酸酯FV对大鼠的抗血栓作用。方法将60只Wistar大鼠随机分为对照组、岩藻聚糖硫酸酯FV 20、10、5、2.5 mg/kg组和低分子肝素钙注射液(LMWHC)213 IU/kg组,每组各10只。分别在下腔静脉血栓模型、体外血栓模型和动静脉旁路血栓模型中研究FV的抗血栓作用,比较血栓干湿质量并计算血栓抑制率。结果 FV 20、10、5、2.5mg/kg能够显著降低大鼠下腔静脉血栓、体外形成的血栓、动静脉旁路中血栓的干湿质量,对血栓湿质量的抑制率最高可达97.4%、94.3%、51.2%,对血栓干质量的抑制率最高可达91.8%、96.6%、64.0%,有明显的抑制血栓形成作用。结论 FV能够抑制血栓形成,量效关系好,具有开发为抗血栓药的良好前景。     

关于住院医师规范化培训的现状与思考

住院医师规范化培训是毕业后医学教育的重要组成部分,是培养高质量医疗卫生人才的重要手段,大大提高了我国整体医疗水平。近年来,住院医师规范化培训逐渐成熟,但仍存在一些问题。文章就住院医师规范化培训中学员自身问题、教学内容及体制方面等的问题进行初步的讨论,并就问题的解决对策提出理论层面的建议,旨在更好地进行住院医师规范化培训,进一步提高住院医师的医疗水平。     

裙带菜多糖对人外周血单个核细胞的免疫活性作用

目的 观察裙带菜多糖对人外周血单个核细胞(PBMC)增殖、淋巴细胞亚群的影响,探讨其免疫调节机制.方法 采用逐步分离法对裙带菜多糖进行分离与纯化.Ficoll密度梯度离心法分离PBMC,随机分为观察组和对照组,观察组分别加入0.5、5、20、100、500 μg/mL裙带菜多糖,对照组仅加入PBS.采用MTT法分析裙带菜多糖对人PBMC体外增殖作用的影响;用流式细胞术检测淋巴细胞亚群的变化.结果 观察组各浓度PBMC增殖活性明显高于对照组(P均＜0.01),且随着浓度的增加增殖反应明显增强.观察组CD8+及CD16+ CD56+细胞比例较对照组明显增加,并呈浓度依赖性(P均＜0.01).结论 裙带菜多糖可通过刺激人PBMC增殖促进CD8+、NK细胞增殖,从而发挥细胞免疫调节作用.     

Worldwide Experience with the Robotic Navigation System in Catheter Ablation of Atrial Fibrillation: Methodology, Efficacy and Safety

Worldwide Survey on Robotic AF Ablation . Introduction: The Hansen Robotic system has been utilized in ablation procedures for atrial fibrillation (AF). However, because of the lack of tactile feedback and the rigidity of the robotic sheath, this approach could result in higher risk of complications. This worldwide survey reports a multicenter experience on the methodology, efficacy, and safety of the Hansen system in AF ablations. Methods and Results: A questionnaire addressing questions on patient's demographics, procedural parameters, ablation success rate and safety information was sent to all centers where more than 50 robotic AF ablation cases have been performed. From June 2007 to December 2009, 1,728 procedures were performed at 12 centers utilizing the Hansen robotic navigation technology. The overall complication rate was 4.7% and the success rate was 67.1% after 18 ± 4 months of follow‐up. In 5 low volume centers there appeared to be a learning curve of about 50 cases (complication rate 11.2% for the first 50 cases vs 3.7% for the 51–100 cases; P = 0.044) and a trend showing a decrease of complication rate with increasing case volume. However, in the remaining 7 centers no learning curve was present and the complication rate was stable over time (3.7% for the first 50 cases vs 3.6% for the 51st case thereafter; P = 0.942). Conclusion: The Hansen robotic system can be used for AF ablation safely. In low volume centers, there appeared to be a learning curve of the first 50 cases after which the complication rate decreased. With a higher case volume, the success rate increased. (J Cardiovasc Electrophysiol, Vol. 23, pp. 820‐826, August 2012)