室速积分法对预激性心动过速的鉴别诊断意义

目的:探讨室性心动过速(室速)积分法对预激性心动过速的鉴别诊断意义。方法:选取2010-01-2018-11收集的30例经过心内电生理确诊的预激性心动过速患者发作时的宽QRS波心电图,用室速积分法对预激性心动过速心电图进行评估,分析积分法的单项指标诊断的特异度,计算总积分并分析不同积分诊断的特异度。结果:(1)室速积分法的7项指标特异性都达60%以上,但除V1导联起始为R,Ⅱ导联RWPT≥50ms,房室分离这3项指标有统计学意义外(P0.05),其余P值都大于0.05。其中房室分离特异度最高,达100%。(2)总积分得0分的为33.3%,积1分的为43.3%,积2分的为23.3%,≥3分的为0%,其特异度分别为66.7%、56.7%、76.7%、100%。结论:(1)积分法7项指标中以房室分离诊断预激性心动过速特异度最高,达100%。(2)室速积分法2分尚不能完全鉴别室速与预激性心动过速,但≥3分特异度为100%,可有效鉴别室速与预激性心动过速,应用室速积分法鉴别这两种心动过速具有较高的临床推广价值。     

黄芪、党参提取物增强紫杉醇抑制肿瘤血管生成和转移的实验研究

目的:观察黄芪、党参提取物对紫杉醇抑制Lewis肺癌血管生成和肿瘤转移的增强作用,为中医药抗肿瘤应用提供实验依据.方法:C57BL/6小鼠右肋处皮下接种Lewis肺癌,6 h后随机分为实验组、紫杉醇组和对照组.实验组接受紫杉醇联合参芪注射液治疗,紫杉醇组接受同等剂量的紫杉醇治疗,对照组用等体积的生理盐水代替.观察指标:移植瘤体积,肿瘤组织内微血管度和肺脏转移瘤数量,小鼠存活时间.结果:与紫杉醇治疗相比,紫杉醇联合参芪可以明显减少移植瘤内的微血管密度(10.1±4.4 vs 16.8±7.3,P＜0.05)和肺脏转移瘤个数(13.4±4.3 vs 18.4±3.9,P＜0.05),明显延长小鼠的存活时间(43.3±8.4 d vs 36.3±6.6 d,P＜0.05). 结论:黄芪、党参提取物对紫杉醇抑制肿瘤血管生成和移植肿瘤转移有一定的增强作用.     

Aangio-OCT测量无视网膜病变的糖尿病患者神经纤维层及黄斑厚度

目的：用血流成像相干光断层成像术（ Angio-OCT）测量无视网膜病变糖尿病患者视网膜神经纤维层（ RNFL）厚度和视乳头（ ONH）参数、黄斑区神经节细胞复合体（ GCC）厚度,并进行分析。方法临床病例系列研究。对2014年12月至2015年8月在解放军306医院眼科就诊的27例（54只眼）散瞳眼底照像诊断为无视网膜病变的糖尿病患者,用Angio-OCT检查受试者视盘形态学参数,整体平均RNFL厚度（ RNFL-Avg）、上方平均RNFL厚度（RNFL-Sup）、下方平均RNFL厚度（RNFL-Inf）、整体平均GCC厚度（GCC-Avg）、上方平均GCC厚度（GCC-Sup）、下方平均GCC厚度（GCC-Inf）。结果 Angio-OCT测得的视盘形态学参数：视盘面积＝（2．24±0.314）mm2,盘沿面积＝（1．45±0.4）mm2,视杯容积＝（0.11±0.09）mm3,杯盘比＝0.327±0.1,杯盘纵比＝0.47±0.16,杯盘横比＝0.76±0.58;整体平均RNFL厚度（RNFL-Avg）（102．35±13．50）μm,上方平均RNFL厚度（RNFL-Sup）（104．20±14．475）μm,下方平均RNFL厚度（RNFL-Inf）（100.31±13．55）μm;整体平均GCC厚度（GCC-Avg）（105．02±26.45）μm,上方平均GCC厚度（GCC-Sup）（104．06±23．25）μm,下方平均GCC厚度（GCC-Inf）（106．07±32．28）μm。结论 Angio-OCT能更精确的观察糖尿患者视盘周围RNFL厚度及GCC厚度,为客观评价提供可靠的检测手段。     

三种准分子激光角膜切削术后中央角膜厚度变化的对比研究

目的比较三种准分子激光角膜切削术后中央角膜厚度(CCT)的差异并探讨不同手术方式角膜切削量的设定。方法使用Pentacam三维眼前段分析仪测量行SBK、LASIK、Epi-LASIK术的近视患者共136例266只眼术前术后的CCT,按屈光度分为低、中、高三组,分别计算和比较CCT及实际切削深度和设计切削深度的差值(Diff值)。结果Epi-LASIK患者低、中、高度组术前CCT分别为(495.70±24.94)、(501.57±31.34)和(525.18±16.53)μm,较SBK和LASIK组患者CCT明显偏薄(P0.01),SBK与LASIK患者术前术后的CCT无显著性差异。SBK、LASIK术后Diff值比较:低度组Diff值分别为(6.57±12.72)、(5.33±9.51)μm;中度组Diff值分别为(7.07±18.19)、(4.42±8.72)μm;高度组分别为Diff值(11.52±10.29)、(7.00±7.33)μm,各组比较差异均无显著性意义。三种手术方式的实际切削的角膜深度均大于设计量。结论CCT较薄的患者多选择Epi-LASIK。充分估计术中实际切削深度与设计切削深度存在的差异是提高手术安全性的保障。     

J2对同种异体穿透性角膜移植模型大鼠CD4+和CD8+T细胞免疫功能的抑制

BACKGROUND: J2 takes functional domain (MHC CD4-D1/) of complex conjugate of CD4 molecule and MHC class II molecule as a target, and is a small molecule compound obtained by computer screening from a chemical data containing hundreds of thousands of organic compounds. In the previous study, J2 was used in mouse models of skin transplantation and keratoplasty by oral and intraperitoneal injection. Results verified that J2 could prolong the survival time of grafts, and suppress occurrence of rejection. To better play the role of a drug targeting and to reduce systemic toxicity, J2 will be further utilized in local treatment of keratoplasty rejection. OBJECTIVE: To investigate the inhibitory effect of new immunosuppressive agent J2 on CD4+ and CD8+ T cell immune functions in rat models receiving allogenic penetrating keratoplasty. METHODS: Allogeneic penetrating keratoplasty model was established using the adult female Wistar rats as donors and Sprague-Dawley rats as recipients. Group A: normal Sprague-Dawley rats were injected with 0.05 mL placebo subconjunctivally. Surgery rats were randomly divided into three groups. Group B: allograft rats were injected with 0.05 mL placebo subconjunctivally after autologous keratoplasty. Group C: allograft rats were injected with 0.05 mL placebo subconjunctivally. Group D: allograft rats were injected with 1% J2-nanosuspension 0.05 mL subconjunctivally. The distribution of T cell subsets in peripheral blood was detected using flow cytometry at 3 days, 1, 2 and 3 weeks after transplantation and compared among groups.  RESULTS AND CONCLUSION: There was no significant difference in total CD3+ T cells, CD4+ T cells, CD8+ T cells and CD4+/CD8+ in peripheral blood lymphocytes in group B at various time points. At 3 days and 1 week after surgery in group C, no significant difference in total CD3+ T cells, CD4+ T cells and CD8+ T cells was detected. At 1 and 2 weeks, the number of total CD3+ T cells, CD4+ T cells and CD8+ T cells increased, showing significant differences (P < 0.05). In group D, no significant hyperplasy was found in CD4+ T cells and CD8+ T cells at 1 and 2 weeks. The horizontal comparison of the same time point: the total CD3+ T lymphocytes of group D was significantly less than group C at 3 days, 1 and 2 weeks after operation (P < 0.05), whereas there was no significant difference at 3 weeks between the group D and group C. The number of CD4+ T lymphocytes in group D was less than in group C at 3 days and 1 week, but with no significant difference. The ratio of CD4+/CD8+ had no significant difference in group D compared with group C at 3 days, 1 and 3 weeks. J2 inhibits T lymphocyte proliferation and then inhibits T cell-mediated corneal allograft rejection.       

缩宫止血片对家兔在体子宫平滑肌收缩的影响

目的 探讨缩宫止血片对家兔在体子宫平滑肌收缩的影响.方法 采用RM6240BD型多道生理信号处理系统,记录家兔在给药前10 min及十二指肠给予生理盐水(对照组)、缩宫素(缩宫素组)、缩宫止血片(大、中、小剂量组)后60 min内子宫平滑肌的收缩幅度和收缩频率.结果 缩宫素在10～50 min内可明显增加家兔在体子宫平滑肌的收缩幅度,10～40 min内可明显增加家兔在体子宫平滑肌的收缩频率.缩宫止血片大、中剂量在20～50 min内可明显增加家兔在体子宫平滑肌的收缩幅度,10～40 min内可明显增加家兔在体子宫平滑肌的收缩频率,小剂量对家兔在体子宫平滑肌的收缩幅度和收缩频率均有作用趋势但不明显.结论 缩宫止血片有增强家兔在体子宫平滑肌收缩的作用.     

通脉舒络液的抗凝血和毒性研究

通脉舒络液是我院附院内科和药剂科根据中医理论于1978年试制成功的治疗脑血栓形成的中药静脉滴注剂。根据5年多来的几百例临床观察证实疗效较好。从已总结的110例的临床报告看,本制剂对脑血栓形成的治愈率为47.3%,总有效率为98.2%(1)。为了推广应用这一新型中药制剂,我们对通脉舒络液进行了抗凝血和毒性研究。     

温里药对小白鼠胃肠推进运动及药物性腹泻的影响

本实验就10味温里药对小白鼠胃肠推进运动及药物性腹泻的影响进行了观察。结果表明,10味温里药中花椒、白胡椒、吴茱萸、毕澄茄、桂皮和高良姜可对抗番泻叶的泻下作用,附子、小茴香、丁香、干姜有对抗倾向;而花椒和白胡椒能对抗蓖麻油的泻下作用,证明多数温里药对刺激性大肠性腹泻有止泻作用,且作用强于制止刺激小肠性的腹泻。