葛根总黄酮缓释片药动学研究

目的：考察葛根总黄酮缓释片体内缓释效果。方法：建立HPLC法测定葛根素的血药浓度，以市售愈风宁心片、自制葛根总黄酮普通片作为参比制剂，采用比格犬进行了缓释片的药动学研究及体内验证实验。结果：与愈风宁心片、自制葛根总黄酮普通片相比，葛根总黄酮缓释片在体内外具有明显的缓释作用。结论：葛根总黄酮缓释片达到了设计要求。     

双氯芬酸钠泊洛沙姆凝胶体外释放的影响因素研究

目的:以双氯芬酸钠为模型药,研究泊洛沙姆407(P407)制剂体外释放的影响因素。方法:采用无膜释放法考察不同P407浓度、振荡频率、温度、等渗调节剂、附加剂等对凝胶溶蚀和药物释放的影响。结果:随振荡频率的增加及等渗调节剂PBS,NaC l或葡萄糖的添加,凝胶溶蚀和药物释放增加;P407浓度增加及处方中加入羟甲基纤维素钠(CMC-Na)、羟丙甲纤维素(HPMC)、甲基纤维素(MC)、羧甲基壳聚糖(O-CMC)等抑制了凝胶溶蚀和药物释放;温度升高药物释放加快而对凝胶溶蚀没有明显影响。结论:药物释放主要取决于凝胶溶蚀,可通过调节处方中影响凝胶溶蚀及药物扩散的因素来控制药物从407凝胶中的释放。     

比色法测定复方阿仑膦酸钠缓释片中阿仑膦酸钠的含量

目的 测定自制的复方阿仑膦酸钠缓释片中阿仑膦酸钠的含量.方法 在碱性条件下,以水合茚三酮乙醇溶液为显色剂, 采用比色法测定,检测波长为568.0 nm.结果 阿仑膦酸钠在4.5～45.0 μg /mL浓度范围内呈良好的线性关系(r=0.9994, n= 6) ;平均回收率为99.28%(RSD =1.32%, n=6) .结论 该方法检测方便快速,结果准确可靠,能满足对制剂中含量控制和测定的要求.     

洛伐烟酸缓释片的制备及释放度研究

目的：制备3种规格（分别含烟酸500、7501、000 mg）的洛伐烟酸缓释片并对其释放度进行评价。方法：以紫外分光光度法测定片芯中烟酸的释放度,考察不同黏度的羟丙基甲基纤维素（HPMC）对片芯中烟酸释放度的影响;设计2因素3水平正交试验,对释放数据进行多元逐步回归和方差分析,计算不同规格的洛伐烟酸缓释片中HPMC的理论用量;并测定3种规格的洛伐烟酸缓释片的释放度,采用相似因子法对试制品与国外上市品释放度进行比较。结果：确定了以HPMCK15M CR为骨架材料,统计分析得到3种规格的洛伐烟酸缓释片中HPMC的理论用量与实际用量接近;其烟酸释放均符合零级释放模型;试制品与国外上市品累积释放度相似。结论：研制的缓释片缓释效果较好,工艺简单。     

膝关节粘连性功能障碍的手术和康复治疗：附20例病例分析

20例因创伤或某些病变后致膝关节纤维性僵直的住院患者,关节活动范围平均40°,影响工作及生活.采用手术分离膝关节内粘连及术后康复治疗,结果,膝关节活动范围平均达110°,较术前增加 70°.15例经平均27个月的随访,优者10例,良者3例,可者2例.     

颅侧进路切除颅底肿瘤15例报告

作者自1989年至1991年采用颅侧例进路切除颅底深部广泛的良恶性肿瘤15例.结果表明,该进路可获得广泛的暴露和直视下手术.加之显微手术技术的应用提高了切除肿瘤的彻底性和安全性.切除侵入颈静脉球肿瘤时,结扎乙状窦和颈内静脉后还应用大量明胶海绵填塞岩下窦出血.随访6个月~30个月,除1例横纹肌肉瘤和1例鳞癌术后9个月颅内转移死亡外,其余均无复发.     

Distribution of drugs following controlled delivery to the brain interstitium

Intracranial controlled release polymers have been used for drug delivery to the brain, bypassing the blood brain barrier (BBB). By understanding the rates and patterns of transport in the local tissues, it is possible to design delivery systems that provide the optimal spatial and temporal pattern of chemotherapy within the intracranial space. This paper reviews the kinetics of drug release from polymeric controlled release implants, and describes the fate of drug molecules following release into the brain interstitium. Potential improvements in drug delivery based on the understanding of the mechanisms of drug release, transport and elimination are discussed.     

磁性药物微球的实验研究

以人血清白蛋白作基质制备包含化疗药丝裂霉素Ｃ的磁性药物微球，并考察其体内分布及体外释药，动物安全性及药效。结果表明，该微球能够浓集滞留于靶位并缓慢释放药物。动物实验证明其安全可靠，疗效比单独使用阿霉素提高一倍多。这表明，磁性微球有希望作为抗肿瘤药物载体应用于临床靶向给药系统以取得局部化疗和物理栓塞的综合治疗效果。     

人工骨异烟肼体外及家兔体内释放度研究

 目的：了解蜂蜡为阻滞剂包裹的异烟肼-人工骨(INH-PHA-wax)与未包裹蜂蜡的异烟肼-人工骨(INH-PHA)体外及家兔体内的释放度。方法：用RP-HPLC在不同时间分别测定体外及植入家兔体内的包裹或未包裹蜂蜡的异烟肼-人工骨中异烟肼的浓度。结果：包裹15%蜂蜡INH-PHA-wax,体外20 d释药66%;包裹25%蜂蜡INH-PHA-wax,20 d释药22%;未包裹蜂蜡INH-PHA,6 d释药97%。包裹25%蜂蜡INH-PHA-wax植入家兔体内，可持续释药达240 d,而未包裹蜂蜡INH-PHA持续释药仅60 d。结论：INH-PHA-wax可有效地控制药物的释放，对治疗骨结核可能是一有效植入式缓释剂。     

Endoscopic carpal tunnel release: thirteen years' experience with the Chow technique

The purpose of this single-center study was to evaluate the results of endoscopic carpal tunnel release (ECTR) by using the dual portal Chow technique in a large series of patients. A total of 2,675 procedures in 1,886 patients were performed during a 13-year period. Follow-up evaluation was performed in 2,402 (90%) cases or 1,698 (90%) patients. The success rate was 95% and the recurrence rate was 0.5%. A total of 106 cases (4.5%) were considered failures or had unsatisfactory results. The overall complication rate was 1.1% but no serious complications occurred in this series. The return-to-work status was followed-up in 1,156 patients; 90% of non-worker's compensation patients and 60% of worker's compensation patients returned to work within 4 weeks. This study suggests that ECTR for carpal tunnel syndrome (CTR) is a reliable procedure with a high success rate. Based on our 13 years of experience, we believe that the technique is safe and iatrogenic complications can be avoided with meticulous surgical technique.