抗血小板治疗的临床概况

有关血小板的止血功能已被人们逐渐认识,但其广泛的生物学功能却较少为人所知。一系列的临术病理现象,如一过性脑缺血发作、心律不齐、心肌梗塞、猝死以及各种组织和器官的缺血、血管搭桥和分流旁路的阻塞等,均以血小板聚集作为致病的关键因素。此外,现已明确,受刺激的血小板所释放的血小     

盐酸氟桂利嗪合用布洛芬缓释胶囊治疗偏头痛疗效观察

偏头痛是神经内科常见病之一，其患病率约为14．6％，各种治疗效果均不理想。我院自2002年1月-2005年1月应用盐酸氟桂利嗪加布洛芬缓释胶囊治疗偏头痛取得较好疗效，现报告如下。 1临床资料1．1一般资料本组选择76例各型偏头痛患者，诊断均符合国际头痛协会于2004年所制订的国际头痛分类及诊断标准第2版病程3个月-7年，偏头痛发作持续时间数小时至数周不等。经头颅CT、神经系统检查均无异常发现，证实无其他颅内疾病并排除颈椎病、高血压及急性脑血管病所致的头痛。随机分为治疗组40例，对照组36例。     

灯盏花素注射液对大鼠脑缺血-再灌注脑损害的凋亡抑制作用

目的:研究灯盏花素(Bre)对大鼠脑缺血-再灌注引起脑损伤的保护作用。方法:实验选用40只雄性Wistar大鼠,大鼠被随机分成5组:假手术组、对照组、硫酸镁(Mg-SO4)治疗组、灯盏花素治疗和组。自大鼠颈总动脉插入尼龙线栓栓塞大脑中动脉,造成大脑缺血,拔出线栓实现再灌注。脑缺血10min后给予75mg/kg和50mg/kgBre及30mg/kgMgSO4,分别于脑缺血1h,再灌注2h,5h和23h分别进行神经病学评分,并于脑缺血1h,再灌注23h时测定脑梗死面积,用TUNEL法和免疫组化法分别检测脑组织凋亡细胞和Caspase-3阳性细胞的变化。结果:灯盏花素降低脑缺血-再灌注大鼠神经病学评分,缩小脑梗死面积,降低脑组织凋亡细胞和Caspase-3阳性细胞数量,其作用强于硫酸镁。结论:灯盏花素通过抑制细胞凋亡可显著保护大脑缺血-再灌注引起的脑损伤,其作用优于单用硫酸镁。     

防治慢性盆腔炎反复发作的相关对策探讨

由于慢性盆腔炎病情缠绵,易反复发作,诱发因素复杂,难以彻底治愈,严重影响了患者的生殖健康和生活质量。本文从强调慢性盆腔炎的病机实质、规范临床与实验研究,主张综合治疗多途径给药,重视心理治疗和情志调节,提倡康复期的巩固治疗以及制定切实可行的预防措施等多方面对防治慢性盆腔炎反复发作的相关对策进行了探讨,为寻求更加合理有效的防治方案提出了研究思路,以期进一步提高中医药治疗慢性盆腔炎的临床疗效,降低复发率。     

L-arginine对局灶脑缺血脑细胞凋亡和微血管密度的影响

目的探讨NO合成底物左旋-精氨酸(L-Arg)对兔局灶脑缺血后血管再生和脑细胞凋亡的影响。方法兔局灶脑缺血后应用L-Arg,流式细胞仪定量分析细胞凋亡率的变化,CD34免疫组织化学测脑组织微血管密度(MVD),脑组织含水率评价脑水肿。结果与对照组比较,L-Arg组脑细胞凋亡率明显减少(8.72±2.62 vs 16.62±2.82,P<0.01),同时脑组织MVD却明显增加(1.21±0.43 vs 0.69±0.22,P<0.01)。结论外源性L-Arg可减少缺血后脑细胞凋亡并促进缺血后血管再生,对局灶脑缺血具有重要的神经保护作用。     

扶芳藤及其合剂在大鼠脑缺血再灌注损伤后的抗氧化作用

背景：扶芳藤和银杏叶都有扩张血管等多种药理活性作用，对脑缺血急性损伤期脑组织中自由基是否有抑制作用?而这种作用将为神经保护药的研究提供依据。目的：研究扶芳藤和银杏叶对大鼠脑缺血再灌注损伤的抗氧化作用。设计：完全随机设计，对照实验研究。地点和材料：广西中医学院实验动物中心提供Wistar雄性大鼠，体质量200～250g，广西中医学院制药厂提供干燥扶芳藤茎叶和银杏叶，2001—01／08在广西中医学院进行实验。干预：实验设计者为第四、二作者。大鼠随机分为4组，第1、2组均不给药。第3组按扶芳藤40g／(kg&;#183;d)，第4组按扶芳藤40g／(kg&;#183;d)和银杏叶30g／(kg&;#183;d)，分别将药材水煎2次、合并药液浓缩至2&;#215;10^3g／L，拌入颗粒饲料喂食10d。各组大鼠均自由饮水进食。麻醉大鼠，定位后切口暴露动脉，电凝阻断椎动脉；结扎颈总动脉，15min后松开颈总动脉，造成脑完全缺血再灌注损伤模型；3h后断头取脑备用。假手术组只切开暴露，不阻断，不结扎。主要观察指标：制备脑组织匀浆，用邻苯三酚法测定超氧化物歧化酶(superoxide dismutase，SOD)的活性，用硫代巴比妥酸(2-Thiobarbituric acid)法测定丙二醛的含量。结果：与对照组比较，喂食扶芳藤的大鼠SOD活力提高22．4％，丙二醛含量降低47．9％，喂食扶芳藤和银杏叶的大鼠SOD活力提高26．4％，丙二醛含量降低45．7％，在统计学上差异有显著性意义(P&;lt;0．01)。结论：扶芳藤、银杏叶有较强的抗氧化作用，提示服用它们具有防治脑缺血相关疾病的作用。     

褪黑素与脑缺血再灌注损伤

脑缺血再灌注损伤是一种全身性反应，其机制包括：氧自由基损伤、兴奋性氨基酸损伤、钙超载、炎性反应和细胞凋亡等方面。而褪黑素作为一种抗氧化剂对神经元损伤具有广泛的保护作用。本文结合脑缺血再灌注损伤的各个机制，对褪黑素的神经元保护作用作以简单的介绍。并对相关实验和研究给予系统性的回顾。     

后循环缺血与眩晕

后循环又称椎基底动脉系统，由椎动脉、基底动脉和大脑后动脉（posterior cerebral artery，PCA）组成，主要向脑干、小脑、丘脑、枕叶、部分颞叶等结构供血。后循环缺血（posterior circulation ischemia,PCI）是常见的缺血性脑血管病。与前循环缺血一样，PCI也可按缺血程度和持续时间的不同分为短暂性脑缺血发作（transient ischemic attack,TIA）和脑梗死。其同义词包括椎基底动脉系统缺血、后循环TIA和脑梗死、椎基底动脉疾病、椎基底动脉血栓栓塞性疾病。     

^1H-magnetic resonance spectroscopy screening for animals with acute cerebral infraction suitable forthrombolytic therapy

BACKGROUND: As a non-invasive technique which can provide comprehensive biological information, 1H-magnetic resonance spectroscopy (1H-MRS) may provide valuable reference data for irreversible recovery or reversible changes in ischemic tissue after stroke. OBJECTIVE: To monitor and evaluate the effect of the urokinase thrombolytic therapy after experimental acute cerebral ischemia by 1H-MRS technology and investigate its adaptability. DESIGN: Randomly controlled animal study. SETTINGS: Shenzhen Hospital of Peking University and National Key Laboratory of Pattern and Atom & Molecular Physics, Wuhan Physics and Mathematics Institute, Chinese Academy of Science. MATERIALS: Eleven healthy adult Sprague-Dawley (SD) rats, weighing 260–300 g and of both genders, were supplied by Experimental Animal Center of Tongji Medical Collage, Huazhong University of Science and Technology [SCXK (e) 2004-007]. 4.7T superconducting nuclear magnetic resonance meter was provided by Brucker Company. METHODS: The experiment was carried out in Shenzhen Hospital of Peking University and National Key Laboratory of Pattern and Atom & Molecular Physics, Wuhan Physics and Mathematics Institute, Chinese Academy of Science from August 2003 to December 2005. ① The rats were randomly divided into 30-minute self-thrombo-embolism group (n =6) and 60-minute self-thrombo-embolism group (n =5). Six rats in 30-minute self-thrombo-embolism group were occluded with clot embolus for 30 minutes and 5 rats in 60-minute self-thrombo-embolism group were occluded for 60 minutes. 10 000 U/kg urokinase was dissolved in 2 mL saline and the operation lasted for 5 minutes. ② 1H-MRS was performed before thrombolysis and at 3 hours and 24 hours after successful embolization. The metabolic changes of N-acetyl-L-aspartic acid (NAA)/phosphocreatine (PCr) + creatine (Cr), choline phosphate (Cho)/PCr+Cr and lactic acid (Lac)/PCr+Cr in the region of interests were analyzed. ③ The T2W image was conducted 24 hours after the thrombolytic therapy with TR=500 ms and TE=25 ms. ④ The subjects were sacrificed immediately after 1H-MRS and the brain tissues were cut into pieces and stained with HE method; in addition, pathological changes were observed under optic microscope. MAIN OUTCOME MEASURES: ① Metabolic changes of NAA/PCr+Cr, Cho/PCr+Cr and Lac/PCr+Cr in the region of interests; ② T2W image at 24 hours after the thrombolysis; ③ pathological observation of brain tissue. RESULTS: Eleven rats were all involved in the final analysis. ① Metabolic changes in the region of interests : In 30-minute self-thrombo-embolism group, the Lac peak emerged immediately after the embolism, but the ischemic zone decreased 3 hours after the thrombolytic therapy (0.252±0.01, 0.603±0.01, P < 0.01). Lac/(PCr+Cr) ratio was 0.290±0.01 at 24 hours after thrombolysis, which was higher than that at 3 hours after thrombolysis (P < 0.01). The NAA/ (PCr+Cr) ratio decreased significantly at 3 hours after the thrombolysis as compared with that before thrombolysis (0.922±0.16, 1.196±0.01, P < 0.05). In 60-minute self-thrombo-embolism group, the Lac/(PCr+Cr) ratio was higher at 3 hours after thrombolysis than that before thrombolysis (0.846±0.12, 0.601±0.11, P < 0.05) and the NAA/(PCr+Cr) decreased at 3 hours after the embolism. Fluctuation of NAA/ (PCr+Cr) ranged from 0.68 to 0.75 before thrombolysis and from 0.71 to 0.75 at 3 hours after thrombolysis. ② T2W image: T2W image showed that 2 subjects in 30-minute self-thrombo-embolism group whose Lac/NAA was higher than 0.7 suffered from intracranial hemorrhage. This meant that the subjects with Lac/NAA > 0.7 were more likely to suffer from intracranial hemorrhage. ③ Histological and morphological examinations: Optic microscope demonstrated that interspace surrounding nerve cells was widened at ischemic center; neurons were swelling; nucleus was stained lightly; pyknosis and mesenchymal edema were mainly observed in lateral cortex of brow and vertex and in lateral part of corpus striatum. CONCLUSION: ①Compound parameters in ischemic area before thrombolysis should be regarded as an important predicting marker for thrombolytic therapy, effect evaluation and termination. ② 1H-MRS combining with other imaging technique is a detecting way for screening cases who are suitable for thrombolytic therapy.