毛细管区带电泳法测定盐酸米多君片的含量

目的 :建立适合盐酸米多君片含量测定及其杂质ST1059 -HCL的定量检测方法。方法 :采用区带电泳法 ,以间氨基酚为内标 ,运行电压20KV ,运行缓冲液为25mmol/L磷酸盐缓冲液 ( pH=3 0) ,检测波长200nm。结果 :盐酸米多君与ST1059 -HCL线性范围分别为50～250μg/ml(r=0 9999)和1 2～6μg/ml(r=0 9987) ,平均回收率分别为100 3 %和98 1 % ,RSD分别为0 8 %和2 5 % (n=5)。结论 :本法简便、准确、重现性好     

盐酸多奈哌齐透过小鼠血脑屏障的动态研究

目的　了解多奈哌齐透过小鼠血脑屏障的转运机制。方法　采用反相高效液相色谱法及Integrationplot法定量解析 ,以多奈哌齐在脑内浓度 (cb)对血浆中浓度 (cp)比值 (Kp)为纵轴 ,血浆中浓度曲线下面积对血浆中浓度比 (AUC/cp)为横轴 ,通过计算机模拟软件进行Integrationplot并求出药物流入脑内的速度常数 (K1)及排出速度常数 (K2 )的比值 ,以此定量反映药物移行入脑的过程。结果　Integrationplot所得结果为抛物线 ,K1(mL·s-1g-1) =0 .0 0 12 1± 0 .0 0 0 16 ,K2 (s-1) =0 .0 0 2 2 7± 0 .0 0 0 37,K1/K2 =0 .5 4 1,当AUC/cP 值在 2 0 0 0s左右时 ,KP 值达到稳定状态。显示多奈哌齐在初期向脑内快速转运 ,后期多奈哌齐的脑内转运和泵出逐渐达到平衡状态。结论　脑内存在着运载多奈哌齐排出脑组织的载体     

盐酸多奈哌齐对D-半乳糖致原代培养神经元损伤的保护作用及其机制

目的:探讨盐酸多奈哌齐(安理申)防治D-半乳糖致原代培养神经元损伤的作用机制。方法:在原代培养第6d,以50mM D-半乳糖(D-gal)作用神经元72h造成自由基损伤模型,用10％盐酸多奈哌齐药物血清防治损伤。倒置显微镜下观察神经元的生长发育形态,MTT法在酶标仪上检测神经元代谢率,PI染色在流式细胞仪上检测神经元凋亡构成比,HE染色观察神经元形态、形态计量神经突起密度,RT-PCR检测糖醛还原酶信使RNA(AR-mRNA)的含量。t检验,比较正常对照神经元、受D-gal攻击神经元和受D-gal攻击同时得到盐酸多奈哌齐防治神经元之间的差别。结果与讨论:受D-gal攻击而受损伤的神经元,生长发育显著迟缓,盐酸多奈哌齐防治使其明显恢复;代谢率从0.762±0.030(n=33)降低到0.543±0.064(n=11,P<0.01),盐酸多奈哌齐防治使其回升到0.652±0.028(n=11,P<0.01);凋亡构成比从0.060±0.029(n=19)增高到0.356±0.215(n=19,P<0.01),盐酸多奈哌齐防治使其回降到0.154±0.130(n=19,P<0.01);出现变性坏死的形态变化,盐酸多奈哌齐防治使其好转,但神经突起浆质中出现均匀、细小的颗粒;神经突起密度从0.557±0 0422(n=10)降低到0.468±0.0330(n=10,P<0.01),盐酸多奈哌齐防治使其回升到0.481±0.0387(η=10,P>0.05);无AR-mRNA的表达。表明盐酸多奈哌     

盐酸二甲双胍胃漂浮缓释片的制备及体外释放

采用羟丙甲纤维素作为骨架材料制备了盐酸二甲双胍胃漂浮缓释片；研究了压片方式、规格及体外释放测定方法对其体外释放的影响。结果表明，该胃漂浮缓释片具有良好的漂浮和缓释特性。     

HPLC法测定注射用黄藤素粉针剂中盐酸巴马汀的含量

目的:建立HPLC法测定注射用黄藤素粉针剂中盐酸巴马汀的含量。方法:用十八烷基硅烷键合硅胶为填充剂,乙腈-水-磷酸二氢钾-十二烷基磺酸钠(300ml∶200ml∶1.7g∶0.85g)为流动相,检测波长为345nm。结果:盐酸巴马汀在0.0101~0.0504μg/ml范围内线性关系良好,相关系数为0.9997(n=5)。平均回收率为99.35%(RSD=0.99%,n=5)。结论:该法简便、快速、准确、稳定,重现性好。     

紫外分光光度法测定盐酸普罗帕酮片的含量

本文采用紫外分光光度法测定盐酸普罗帕酮片的含量，经与中国药典（１９９０年版）法比较结果基本一致，且快速、重现性好，回收率高。     

乌拉地尔注射液治疗重度原发性高血压的疗效与安全性

目的:评价乌拉地尔注射液治疗重度原发性高血压(EH)的降压疗效和不良反应.方法:采用多中心、双盲随机、平行组间对照研究设计.共121例入选,试验组61例,对照组60例.试验组用乌拉地尔注射液平均为81.79mg,对照组用盐酸乌拉地尔注射液(利喜定注射液)平均为84.21mg,均静脉推注12.5～25mg后静脉滴注给药,总疗程8h.结果:治疗前后比较,试验组坐位SBP下降41.26mmHg,DBP下降24.46mmHg.对照组坐位SBP下降42.01mmHg,坐位DBP下降25.36mmHg,均具有显著性差异.总有效率试验组(95.08%)略低于对照组(96.67%),无显著性差异(P＞0.05).治疗后血压降为正常水平者在试验组为36/61(59.02%),高于对照组30/60(50.00%),无显著性差异(P＞0.05).不良反应人数在试验组为13/61(21.31%),对照组为16/60(26.67%),2组间无统计学显著性差异(P＞0.05).结论:乌拉地尔注射液可以明显、迅速、平稳地降低血压,疗效显著、可靠.     

一阶导数光谱法测定盐酸丁卡因滴眼液的含量

采用一阶导数光谱测定盐酸丁卡因滴眼液含量，取其导数光谱特征振幅作为定量信息，并可涓除对羟基苯甲酸乙酯的干扰，操作简便。相关系数r＝0．9997，回收率99．55％（RSD＝0．38％）     

A New Ternary Polymeric Matrix System for Controlled Drug Delivery of Highly Soluble Drugs: I. Diltiazem Hydrochloride

Purpose. The purpose of this study was to develop a new ternary polymeric matrix system that is easy to manufacture and that delivers a highly soluble drug over long periods of time. Methods. Pectin, hydroxypropylmethylcellulose (HPMC), and diltiazem HC1 granulated with gelatin at optimized ratios were blended at different loading doses and directly compressed. Swelling behavior, dissolution profiles and the effect of hydrodynamic stress on release kinetics were evaluated. Results. Diltiazem release kinetics from the ternary polymeric system was dependent on the different swelling behavior of the polymers and varied with the drug loading dose and hydrodynamic conditions. Drug release followed either non-Fickian or Case II transport kinetics. The relative influence of diffusion and relaxational/dissolution effects on release profiles for different drug loadings was calculated by a nonlinear regression approach. Photographs taken during swelling show that the anisotropic nature of the gel structure, drug loading dose, swelling capacity of polymers used, and the design of delivery system all play important roles in controlling the drug release and dissolution/ erosion processes. Conclusions. Zero-order delivery of diltiazem HC1 from a simple tablet matrix was achieved. The ternary polymeric system developed in this study is suitable for controlled release of highly soluble drugs. It offers a number of advantages over existing systems, including ease of manufacturing and of release modulation, as well as reproducibility of release profiles under well defined hydrodynamic conditions. Our delivery system has the potential to fully release its drug content in a controlled manner over a long time period and to dissolve completely.     

尼卡地平预防老年高血压患者气管拔管反应效果观察

目的:研究尼卡地平预防老年高血压患者气管拔管反应的效果。方法:56例行胸腹部手术的老年高血压患者,术毕符合拔管条件时随机平均分为尼卡地平组和硝酸甘油组,分别静脉注射尼卡地平或硝酸甘油0.01mg/kg,继以0.02mg·kg-1·h-1泵入,拔管后即刻停止。比较2组麻醉诱导前、用药前、吸痰时、拔管时,拔管后1min、5min、10min的心率(fH)、收缩压(pSB)、舒张压(pDB)和心率收缩压乘积(RPP)。结果:拔管前应用硝酸甘油和尼卡地平均可有效降低血压,但硝酸甘油降压不平稳,心率增快,增幅较大,拔管后10min心率和RPP仍未恢复;尼卡地平降压作用平稳,心率增幅较小,拔管后10minRPP和心率均可恢复到术前水平,不良反应也较轻。结论:尼卡地平可有效预防老年高血压患者气管拔管时血压升高,但不能明显抑制心率增快。