豚鼠内耳磁微粒栓塞缺血模型初探

OBJECTIVE: To set up an inner ear ischemic model in guinea pig with ferromagnetic embolism. METHODS: A magnet was fitted in the external auditory canal and carbonyl iron filings (1%, 1 ml/kg) was injected into jugular, then the inner ear vessels were obstructed by ferromagnetic spheres. Cochlear blood flow (CBF) and number of red blood cells in the stria vessels were used to detect the model's ischemia of cochleae. The slice of temple bone and basal membrane stained by silver nitrate were used for inner ear's histopathological observations. RESULTS: The iron spheres were amassed in the one and two-day-later's model of inner ear vessels, which resulted in embolism. The number of red blood cells in the stria vessels decreased and then recovered to normal level after 4 days, but the CBF decreased to 50% +/- 10% of basic level immediately and recovered to 99% +/- 41% 4 days later. Scattered lesion of out hair cell cilium could be seen in cochleae in eight-day-later's model, and degenerations in different degree were found in vascular stria. CONCLUSION: The methods of inner ear ischemic model with ferromagnetic embolism could be practical and the decrease of CBF was reversible, so it may be an ideal model for studying some ischemic inner ear diseases and evaluating the effects of therapeutic drugs.     

复方炎平对小鼠细胞免疫的影响

目的：研究复方炎平（YP）对机体免疫功能的影响，以探讨其增强免疫 功能的作用机理。方法：体内巨噬细胞吞噬功能测定法。结果：YP组小鼠吞噬百分比和吞噬指数皆高于正常对照组（P＜0．05）。结论：YP有提高小鼠巨噬细胞吞噬功能作用，从而提示其可能在调节机体非特异性细胞免疫方面有一定意义。     

脑电双频指数指导老年病人异丙酚麻醉诱导用量

[目的]通过监测老年病人麻醉诱导时脑电双频指数(BIS)的变化,探讨既能维持足够麻醉深度又能避免严重低血压的异丙酚诱导用量。[方法]40例ASA II～I级的老年病人(65～85岁),随机分成两组。A组静脉注射异丙酚1.6 mg/kg;B组静脉注射异丙酚,其用量是使BIS下降到40～50时的用量。两组均复合维库溴铵0.1 mg/kg和瑞芬太尼1ug/kg诱导后行气管插管分别记录基础值、插管前、插管后1 min、5 min和10 min时的收缩压(SBP)、舒张压(DBP)、平均动脉压(MAP)、心率(HR),同时记录诱导异丙酚用药量和BIS的变化。[结果]A组异丙酚诱导用药量(99.7±18.05)mg,平均(1.64±0.7)mg/kg,B组(82.9±12.5)mg,平均(1.35±0.5)mg/kg,差异有统计学意义(P﹤0.05)。A组血压(BP)和BIS比B组明显降低。[结论]老年病人异丙酚麻醉诱导的合适用量为(1.35±0.5)mg/kg;既能维持老年人足够的麻醉深度又能避免严重低血压的发生。     

关于急性脑梗死溶栓治疗研究中的几个关键问题

溶栓治疗能迅速、直接地再通阻塞血管，恢复灌注，从而有效缩小梗死面积甚至阻止梗死进一步形成，因此，早期溶栓治疗可能会成为急性脑梗死最重要的治疗方法。因为溶栓治疗涉及的时间窗、溶栓后缺血／再灌注损伤等并发症问题，限制了其广泛应用；而且脑梗死溶栓治疗临床研究设立对照组困难，其基础研究就显得尤为重要。目前溶栓研究中存在动物模型制备、溶栓治疗时机、     

新胆碱酯酶抑制剂对实验性重症肌无力的治疗作用

本文应用实验性重症肌无力模型研究了7种新的胆碱酯酶抑制剂对实验性重症肌无力的治疗作用,其中包括6种二甲氨基甲酸烷氧(烷硫)基苯酯及1种中草药提取物,大多数化合物对乙酰胆碱酯酶有较强的抑制作用,并见到有不同程度的治疗效果。二甲氨基甲酸-3-叔丁基-4〔2-(1-哌啶基)乙氧基〕苯酯不仅明显改善肌无力症状,而且毒性小、副作用较新斯的明轻,值得进一步研究。     

急性软脑膜微循环障碍实验模型的研究

本文报道应用高分子右旋糖酐制成软脑膜微循环障碍的动物实验模型。软脑膜微循环障碍模型的标志;软脑膜微血管血流速度减慢,血液流态呈粒状流或絮状流,血细胞聚集。 将98只家兔分成甲、乙二组。甲组38只,静脉注射平均分子量为25万的高分子右旋糖酐,乙组60只,静脉注射平均分子量为49万的高分子右旋糖酐。实验结果发现,甲组38只家兔仅28只可复制成软脑膜微循环障碍的实验模型,模型复制成功率为73.6％;乙组60只家兔,59只可形成软脑膜微循环障碍实验模型,成功率为98.3％。本实验证明复制动物模型以49万分子量的高分子有旋糖酐为宜。 本实验模型可用于脑微循环障碍和改善脑微循环药物的研究工作。     

实验性腹主动脉瘤瘤体外径与iNOS相关性分析及分期研究

Objective To construct new model of experimental abdominal aortic aneurysm (AAA) and detect the AAA outer diameter and the change of induce nitric oxide synthase(iNOS) in the abdominal aor-tic aneurysm in different period,and analysis the correlation between experimental AAA and iNOS.Methods During the operation of the experiment group,the vascular prosthesis of PTFE was implanted to the rabbit abdominal aorta to form an aneurysm,while sham operation was done in the control group.The tissue of ab-dominal aortic aneurysm was harvested in 1 d,7d,14d,and 28d after operation,respectively.The tissue bo-mogenate concentration of iNOS in the abdominal aortic aneurysm were detected by enzyme linked immu-nosorbent assay (ELISA).Results In experimental group,mean concentration of the tissue bomogenate concentration of iNOS in the abdominal aortic aneurysm in 1 d,7 d,14 d,28 d were (22.129 ±2.518)μ/mL,(27.337±5.321) μ/mL,(36.047±4.584)μ/mL,(44.756±1.799)μ/mL,respectively;In control group,that was (12.499±1.807)μ/mL.The concentration of iNOS in experimental group was significantly higher than that of control group (P < 0.01).The difference during the experimental group all had statisti-cal significance (P < 0.05).Conclusion It is possible that iNOS has some biological function during the formation and progression of the abdominal aortic aneurysm.     

应用"食品交换法"和"食物血糖生成指数"指导2型糖尿病人饮食及效果评价

糖尿病是门诊常见病、多发病,且发病率呈上升趋势,以往基层医院治疗达标率一直很低,究其原因是因为饮食治疗得不到很好贯彻和落实。运用“食品交换法”和“食物血糖生成指数”对200名患者进行健康教育,取得了良好效果。1临床资料1.1一般资料研究对象为1998年糖尿病专科门诊成立     

壳聚糖神经干细胞复合物修复大鼠完全性脊髓损伤的组织学观察

目的：探讨壳聚糖与神经干细胞复合物修复成年SD大鼠完全性脊髓损伤的可行性。方法：制作大鼠脊髓完全缺损模型，在形成的缺损中植入壳聚糖与神经干细胞复合物(实验组)，或只植入壳聚糖(对照组)，或不加任何材料(空白组)，术后2、4、8周灌注取材，观察结果。结果：壳聚糖与神经干细胞复合物在植入SD大鼠脊髓完全缺损模型后，能桥接缺损两端脊髓；其内的神经干细胞能存活、迁移并分化成多种形态的神经组织细胞，并诱导神经轴突向复合材料内生长。结论：壳聚糖与神经干细胞复合物有可能桥接并修复大鼠脊髓完全缺损性损伤。