22-j?hriger Sportler mit Sinusarrest und Pausen bis 7?Sekunden

A 22-year-old athlete with nocturnal asymptomatic episodes of transient sinus arrest/sinoatrial block up to 7.3?s and recurrent inappropriate sinus tachycardias which had been incidentally found during Holter electrocardiography diagnostics is presented. In spite of extensive diagnostic work-up including invasive procedures like coronary angiography and electrophysiological study, no causal etiology was found. Based on the normal findings and the lack of symptoms, we decided not to implant a permanent pacemaker. After 14?months, the patient is still asymptomatic. Howerver, the 24-h Holter electrocardiography shows unchanged frequency of nocturnal transient sinus arrest episodes.     

Ginkgo biloba leaf extract improves the cognitive abilities of rats with D-galactose induced dementia

Standardized Ginkgo biloba leaf extract has been used in clinical trials for its beneficial effects on brain functions,particularly in dementia.Substantial experimental evidences indicated that Ginkgo biloba leaf extract (EGB) protected neuronal cells from a variety of insults.We investigated the effect of EGB on cognitive ability and protein kinase B (PKB) activity in hippocampal neuronal cells of dementia model rats.Rats received an intraperitoneal injection of D-galactose to induce dementia.Forty-eight Spraque-Dawley rats were randomly divided into six groups,including the control group,D-galactose group (Gal),low-dose EGB group (EGB-L),mid-dose EGB group (EGB-M),high-dose EGB group (EGB-H) and treatment group.The EGB-L,EGB-M and EGB-H groups were administered with EGB and D-galactose simultaneously.Y-maze,cresyl violet staining,TUNEL assays and immunohistochemistry staining were performed to detect learning and memory abilities,morphological changes in the hippocampus,neuronal apoptosis and the expressing level of phospho-PKB,respectively.Rats in the Gal group showed decreased abilities of learning and memory,and hippocampal pyramidal cell layer was damaged,while EGB administration improved learning and memory abilities.The Gal group exhibited many stained,condensed nuclei and micronuclei,either isolated or within the cytoplasm of cells (39.5±1.4).Apoptotic cells decreased in the groups of EGB-L (35.9±0.9),EGB-M (16.8±1.0) and EGB-H (10.1±0.8),and there were statistical significances compared with the Gal group.Immunoreactivity of phospho-PKB was localized diffusely throughout the cytosol of cells in all groups,while the immunoreactivity of the Gal group was weak.EGB significantly attenuated learning and memory impairment in a dose-dependent manner,while it could decrease the nmber of TUNEL-positive cells,and increase the activity of PKB.Our results demonstrated that EGB attenuated memory impairment and cell apoptosis in galactose-induced dementia model rats by activating PKB.     

单侧腰-硬联合麻醉用于高龄患者髋关节手术的效果

【摘要】 目的 探讨80岁以上高龄患者髋关节置换手术采用单侧腰硬联合麻醉的临床效果。 方法 我院2009年至2011年择期行髋关节置换手术病例130例,年龄在80~96岁,ASA Ⅱ~Ⅲ级。将130例随机分为对照组和观察组,每组各65例,观察组于L3-L4穿刺采用单侧腰硬联合麻醉;对照组于L2-L3穿刺采用硬膜外麻醉。两组患者一般资料无明显差异,具有可比性。观察两组麻醉效果。 结果 观察组患者在麻醉起效时间和麻醉阻滞完善时间明显较对照组快,(P<0.05)。两组患者麻醉前后心率无明显变化,对照组的收缩压、舒张压、平均动脉压麻醉后与术前比较波动较大(P<0.05)。两组患者麻醉效果比较,观察组麻醉效果好于对照组。 结论 单侧腰硬联合麻醉具有起效快、镇痛和肌松效果好、麻醉平面可控性强、呼吸循环影响小等优点,可安全有效地用于高龄患者的手术麻醉。     

影响胫骨平台骨折预后因素的研究

【摘要】 目的 探讨影响胫骨平台骨折预后的因素,为临床治疗及康复提供依据。方法 收集2006年1月~2011年12月收治的62例胫骨平台骨折病例,其中非手术治疗19例,方法为抽取关节腔积血,加压包扎,石膏托外固定;手术治疗43例,方法为切开复位内固定。结果 临床治疗后均获得随访,随访平均时间2.8年。参照Lysolm评分标准,非手术治疗组优良率73.7%,手术治疗组优良率88.4%。SchatzkerⅠ、Ⅱ、Ⅲ型骨折优良率高于Ⅳ、Ⅴ、Ⅵ型(P<0.05);男性患者优良率稍高于女性患者,但差异无统计学意义;8小时内治疗的患者预后优良率高于8小时后治疗的患者(P<0.05);60岁以上患者预后优良率不及60岁以下患者。3例患者术后出现创伤性关节炎,2例患者术后出现不同程度的关节面塌陷。结论 手术是胫骨平台骨折的有效治疗方法。胫骨平台骨折类型,治疗方法和治疗时机的选择,患者年龄,早期功能锻炼可以影响胫骨平台骨折的预后。     

急诊科临床分离细菌耐药性分析

目的了解北京大学第一医院急诊科2012年至2015年临床分离细菌的分布及抗菌药物耐药情况。方法收集急诊科2012年至2015年临床分离的非重复细菌,用纸片扩散法或自动化仪器法进行抗菌药物敏感性试验,按照美国临床和实验室标准协会(CLSI)2015标准判定药物敏感结果,用WHONET5.6软件进行统计分析。结果临床共分离1283株细菌,其中革兰氏阳性菌占30.6%,革兰氏阴性菌占69.4%。分离最多的前5位细菌分别是大肠埃希菌(18.4%),鲍曼不动杆菌(15.2%),金黄色葡萄球菌(13.3%),铜绿假单胞菌(12.7%)和肺炎克雷伯菌(8.8%)。耐甲氧西林金黄色葡萄球菌(MRSA)的平均检出率为75.6%,耐甲氧西林凝固酶阴性葡萄球菌(MRCNS)的平均检出率为83.1%,葡萄球菌中未发现对利奈唑胺、万古霉素耐药菌株。粪肠球菌对所测试的大多数抗菌药物的耐药率均明显低于屎肠球菌。超广谱β内酰胺酶(ESBLs)阳性大肠埃希菌的检出率为64.8%,克雷伯菌属细菌为40.5%。铜绿假单胞菌对亚胺培南、美罗培南耐药率分别为30.1%,28.4%,鲍曼不动杆菌对亚胺培南、美罗培南耐药率分别为83.5和83.0%。结论临床分离细菌对抗菌药物耐药性较高,MRSA、耐万古霉素肠球菌、泛耐药肠杆菌科细菌、泛耐药鲍曼不动杆菌、泛耐药铜绿假单胞菌的检出率较高,给临床治疗带来一定挑战。     

Review of the Applications of Biomedical Compositions Containing Hydroxyapatite and Collagen Modified by Bioactive Components

Regenerative medicine is becoming a rapidly evolving technique in today’s biomedical progress scenario. Scientists around the world suggest the use of naturally synthesized biomaterials to repair and heal damaged cells. Hydroxyapatite (HAp) has the potential to replace drugs in biomedical engineering and regenerative drugs. HAp is easily biodegradable, biocompatible, and correlated with macromolecules, which facilitates their incorporation into inorganic materials. This review article provides extensive knowledge on HAp and collagen-containing compositions modified with drugs, bioactive components, metals, and selected nanoparticles. Such compositions consisting of HAp and collagen modified with various additives are used in a variety of biomedical applications such as bone tissue engineering, vascular transplantation, cartilage, and other implantable biomedical devices.