逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

不同厂家奥美拉唑肠溶胶囊的体外溶出度比较

目的比较7个厂家奥美拉唑肠溶胶囊的体外溶出度,为临床用药提供参考。方法采用桨法进行体外溶出度实验,以高效液相色谱法进行含量测定,计算累积溶出百分率。以威布尔方程拟合溶出参数,并用方差分析对组间溶出参数进行统计学处理。结果7个奥美拉唑肠溶胶囊体外溶出度均符合《中国药典》（2005年版）的规定,但各厂家奥美拉唑肠溶胶囊的溶出参数m、t30、t50、td、t80间存在显著性差异（P〈0.01）。结论不同厂家奥美拉唑肠溶胶囊的溶出参数存在差异,临床用药时应加以注意。     

694例抗心磷脂抗体阳性病例病因构成和临床特点分析

目的研究抗心磷脂抗体阳性而不能诊断为抗磷脂综合征(APS)患者的病因构成和临床特点。方法回顾性分析华西医院2009年01月至2014年01月抗心磷脂抗体(anti-cardiolipin antibody,a CL)阳性且不能诊断为APS的病例共694例。根据第13届抗磷脂抗体国际会议建议将a CL值分为低滴度和中高滴度进行病因统计,并分析a CL滴度对系统性红斑狼疮(SLE)临床特点的影响。结果 1 a CL阳性可见于多种疾病。最多见于自身免疫性疾病,其次为缺血性脑血管疾病、感染性疾病、恶性肿瘤、肾脏疾病,还可以见于其他神经系统疾病、淋巴增殖性疾病、发热原因未明等其他疾病。2 a CL阳性在自身免疫性疾病中以SLE最多,其次为重叠综合征、类风湿关节炎,还可见于干燥综合征、炎性肌病、未分化结缔组织病、硬皮病等。3在SLE患者中,中高滴度a CL组血小板减少及Coombs试验阳性的贫血的发生率均明显高于低滴度组,差异有统计学意义(P0.01)。4中高滴度a CL组抗ds DNA抗体阳性、a PTT延长、血栓事件、狼疮肾炎、狼疮脑病、心脏瓣膜病变等临床特点的发生率均高于低滴度组,但差异无统计学意义(P0.05)。结论 a CL临床意义需结合临床表现综合判断。