急性肾功能衰竭家兔NO及其合酶的变化

目的:观察急性肾功能衰竭(ARF)家兔血清一氧化氮(NO)及其合酶的变化,探讨NO在ARF发病机制中的作用.方法:家兔60只均分为四组(n=15).ARF模型Ⅰ组:皮下注射1%HgCl2(1.3ml/kg.bw);ARF模型Ⅱ组:肌肉注射50%甘油(10ml/kg.bw);以等量生理盐水代替HgCl2和甘油作为对照Ⅰ、Ⅱ组.24h后,所有动物颈总动脉放血备检,制备肾匀浆.经Aeroset型全自动生化分析仪测定血清BUN、SCr水平,以硝酸还原酶法、化学显色法分别检测血清及肾组织匀浆NO含量及NOS、iNOS活性,肾组织匀浆总蛋白以双缩脲法定量.结果:ARF模型Ⅰ、Ⅱ组血清NO含量及NOS、iNOS活性分别高于相应对照Ⅰ、Ⅱ组(P＜0.05～0.01),肾匀浆NO含量显著高于相应对照组(P＜0.01).结论:NO在ARF发病过程中发挥保护及损伤的双重作用.     

体液免疫功能变化在急性肾功能衰竭中的作用

目的:观察急性肾功能衰竭(ARF)家兔血清免疫球蛋白及补体的变化,探讨体液免疫功能变化在ARF发病机制中的作用.方法:家兔60只均分为四组(n=15).ARF模型Ⅰ组:皮下注射1%HgCl2(1.3ml/kg.bw);ARF模型Ⅱ组:肌肉注射50%甘油(10ml/kg.bw);以等量生理盐水代替HgCl2和甘油作为对照Ⅰ、Ⅱ组.24h后,所有动物颈总动脉放血备检.经Aeroset型全自动生化分析仪测定血清BUN、SCr水平,以免疫比浊法检测IgG、IgA、IgM、C3、C4等反映体液免疫功能的指标.结果:ARF模型Ⅰ、Ⅱ组血清IgG、IgA、IgM、C3、C4水平均分别高于相应对照Ⅰ、Ⅱ组(P＜0.05～0.01).结论:体液免疫功能增强在ARF发病过程中具有重要作用.     

Reversal of haemodialysis induced hypertriacylgycerolemia by L-carnitine

A 24 week follow-up study on lipid change following maintenance haemodialysis (MHD) in 25 chronic renal failure (CRF) patients revealed significantly raised serum Triacylglycerol (TAG) levels in these cases (P<0.001), while cholesterol and HDL-Cholesterol did not show any significant change, the extent of increase was 10.5±3.6% after 12 weeks and 23.0±5.8% after 24 weeks. Corresponding increase in CRF patients treated conservatively, without haemodialysis, were 3.1±1.2% and 7.2±2.7% at these intervals. Subsequent oral administration of L-Carnitine (5mg/kg body weight twice a day) for three weeks brought about a significant reversal of elevated serum TAG level in MDH group as well as in the conservatively treated group (P≤0.05). It is concluded that the haemodialysis induced Hyper-Triacylglycerolemia of CRF patients is revertible by Carnitine replenishment. Even the concomitant increase in conservatively treated group is revertible by carnitine administration.     

Thyroid hormone profile in peritransplant period in live donor kidney transplantation

Chronic renal failure, characterised by two factors acting in opposite directions with respect to the serum thyroid homone levels was chosen for the study. Healthy controls, donors undergoing nephrectomy and renal transplant recipients were studied. In transplant recipients, presurgical levels of total thyroxine(TT4), free triiodothyronine(FT3) and free thyroxine(FT4) were lower than controls, and immediately after the release of arterial clamps, there was an upsurge of total triiodothyronine (TT3), TT4, FT3 and FT4 due to administered and/or endogeneously secreted catecholamines. The levels of the 7th day were comparable to the presurgical levels. The changes observed in donors and recipients were similar indicating that the hormonal changes observed are mostly due to surgical stress. Recovery in the hormonal status did not start in the first week of posttransplant period.     

摩擦摆支座在钢管混凝土拱桥中减震效果研究

以跨度为120m的刚性拱肋柔性系杆的下承式钢管混凝土拱桥为分析模型,利用摩擦摆减震隔震支座对简支体系的桥跨结构进行减震研究,运用MIDAS有限元软件模拟多维人工地震波输入以检验摩擦摆系统的减震效果。分析结果证明了在大跨度钢管混凝土拱桥中应用摩擦摆隔震支座系统的有效性。     

滇池微囊藻毒素对小鼠肾脏的毒性研究

为了探索滇池微囊藻毒素对小鼠肾脏的损伤作用,以滇池水华水样提取微囊藻毒素对小鼠进行连续灌胃,然后取其。肾组织石蜡包埋、HE染色后对小鼠肾脏组织进行显微结构观察．结果显示,小鼠肾脏形态未见明显异常,但肾小管因细胞脱落而结构不完整,细胞间隙有炎症细胞浸润．表明肾脏可能是微囊藻毒素的靶器官,微囊藻毒素通过破坏肾单位的结构,影响其生理功能．     

血清胱抑素C对高血压早期肾损伤诊断价值的研究

目的探讨血清胱抑素C（Cystainc）水平在原发性高血压早期肾损伤临床诊断中的价值。方法高血压病1。2级患者共41例作为观察组,同时选择41例健康体检者作为对照组,分别检测两组治疗前后Cystain C、尿微量白蛋白（mAlb）、血清肌酐（Scr）、尿素氮（BUN）、内生肌酐清除率（Ccr）等。结果观察组与对照组间Cystain C、24hmAlb、Ccr有显著性差异（P〈0．01）、Scr差异无显著性（P〉0．05）;结论血清Cystain C的浓度比BUN、Scr浓度更能够反映肾小球滤过功能的损害,是早期诊断肾小球滤过功能受损的敏感指标之一。     

自由基损伤在甘油致家兔急性肾功能衰竭中的作用

目的:观察甘油致急性肾功能衰竭(ARF)家兔自由基的变化,探讨自由基损伤在ARF发生中的作用及其意义.方法:30只家兔随机分为两组:50%甘油(10ml/kg.bw)肌肉注射复制家兔ARF模型,等量生理盐水代替甘油作为对照组(n均=15).分别应用改良TBA微量法、黄嘌呤氧化酶法测定血清及肾脏组织匀浆的丙二醛(MDA)水平、超氧化物歧化酶(SOD)活性的变化.结果:ARF组血清及肾脏组织匀浆的MDA水平高于对照组(P＜0.01),SOD活性显著低于对照组(P＜0.01).结论:自由基损伤在甘油致家兔ARF过程中具有重要作用.     

Evaluating role of oxidative stress in determining the pathogenesis of falciparum malaria induced acute renal failure

Serum malondialdehyde was measured in sixty-one falciparum malaria cases, which include thirty uncomplicated, and thirty-one complicated with acute renal failure. Twenty-six healthy individuals were also studied as controls. Serum malondialdehyde level was found to be significantly elevated in falciparum malaria induced acute renal failure cases when compared with uncomplicated falciparum malaria (p<0.001) and healthy controls (p<0.001). A positive correlation with the raised urea, creatinine and bilirubin levels were significant (r=0.62, p<0.025; r=0.65, p<0.05 and r=0.72, p<0.001 respectively) indicating the severity of complication with rise of lipid peroxides in falciparum malaria induced acute renal failure cases.     

PHC管桩在建筑工程中的应用

本文介绍了预应力高强混凝土管桩（PHC）在建筑工程中的适用范围及其优缺点，并着重阐述了PHC管桩承载力的几种计算方法，提出了PHC管桩在超静孔隙水压力的消散和桩周土的固结作用下，单桩承载力在任意时刻的预测。