首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 93 毫秒
1.
张召平  田庆印 《武警医学》1999,10(4):227-228
氧化修饰低密度脂蛋白(OX-LDL)在动脉粥样硬化性心脑血管疾病发生发展过程中,起着十分重要的作用。内皮细胞损伤被认为是动脉粥样硬化发生的始动环节,OS-LDL对内皮细胞具有毒性作用,且可以直接灭活内皮细胞产生的一氧化氮(NO)[1]。本文旨在探讨冠...  相似文献   

2.
目的 观察高压氧(HBO)对海水淹溺肺水肿(PE-SWD)的预防作用。方法 复制PE-SWD动物模型后,32 只兔随机分为PE-SWD对照组、药物治疗组和HBO组。对3 组兔的动脉血气酸碱指标、Ca2+ 沉淀反应颗粒、c-fos m RNA和c-jun m RNA 等进行自动检测和定量分析比较,并观察分析3组兔的存活时间和海水型呼吸窘迫综合征(seaw ater-respiratory distress syndrom e,SW-RDS)发生率。结果 HBO组兔PaO2 ,SaO2 和pH 3 项指标比药物组显著升高(P< 0.01),动物存活时间[(43.03±7.19)小时]比药物组[(23.58±1.49)小时]明显延长,Ca2+ 沉淀反应颗粒,c-fos m RNA,c-jun m RNA和SW-RDS发生率HBO组则明显低于药物组(P< 0.01)。结论 HBO可明显提高PaO2 和SaO2,有效改善低氧血症和代谢性酸中毒,减轻PE-SWD时肺组织的损伤,从而可防止PE-SWD向SW-RDS转化。  相似文献   

3.
目的探讨c-myb基因反义核酸对辐射所致白血病的逆转作用。方法以脂质体为载体,用人工合成的c-myb基因反义寡核苷酸(ASODN)及无关寡核苷酸(N-ASODN)作用于人急性红白血病K562细胞系,以观察K562细胞的增殖、集落形成、DNA合成及c-myb癌基因的表达。结果ASODN可抑制K562细胞的增殖[作用24小时,20μmol/L的ASODN的抑制率为(66.81±7.54)%,P<0.01]、集落形成、DNA合成[20μmol/L的ASODN作用12小时、24小时、48小时时抑制率分别为(48.93±6.74)%、(69.55±1.78)%和(57.62±5.50)%,P<0.01]及c-myb癌基因的表达;而对照组对K562细胞则无明显影响。结论c-myb基因ASODN可逆转K562细胞恶性表型,反义技术对白血病的防治指出了新方向。  相似文献   

4.
L┐ARGININEIMPROVESTHESPLANCHNICVASODILATATIONANDINTESTINALBLOODFLOWINENDOTOXEMIAXIAONan(肖南),CHENHui-sun(陈惠孙),HUDe-yao(胡德耀)LUS...  相似文献   

5.
目的:观察高压氧(HBO)致氧惊厥时大鼠海马神经元突触体内游离钙离子浓度([Ca ̄(2+)]i)和作为一氧化氮合成水平指标的cGMP浓度的变化,并观察钙通道阻断剂(苏林碱,DSL)和一氧化氮合成酶抑制剂(N-硝基-L-精氨酸,LNNA)对氧惊厥的预防作用及其对上述生化参数的影响,同时探讨氧惊厥的机理。方法:实验用SD大鼠,分两批进行。第一批,观察LNNA和DSL对大鼠氧惊厥的保护作用;第二批采用钙荧光指示剂fura-2/AM和cGMP放射免疫试剂盒测定了HBO致氧惊厥时大鼠海马神经元内[Ca ̄(2+)]i和cGMP浓度。结果:大鼠氧惊厥时,突触体内钙离子和神经元内cGMP均显著升高,分别为对照组的2倍和3倍。预先给DSL后,突触体内钙离子和cGMP分别降至56%和60%。预先给LNNA后突触体内钙离子和cGMP浓度分别降至氧惊厥组的70%和36%。同时,CNS氧中毒发生的时间延长,存活率明显增加。L-精氨酸能明显减弱LNNA对氧惊厥的预防作用。结论:神经元内游离钙离子超载和NO-cGMP途径激活是造成HBO致氧惊厥的重要原因。  相似文献   

6.
ASTUDYOFTHERELATIONSHIPBETWEENRENALINJURYSEVERITYANDHIGHENERGYSHOCKWAVEDOSESAPPLIEDJIANGJun(江军),FANGYu-hua(方玉华),JINFeng-shuo(...  相似文献   

7.
EVALUATIONOFTWOKINDSOFSPINALINTERNALFIXATIONINCLINICALRESULTSANDBIOMECHANICSSHENGen-biao(沈根标),LUOZhuo-jing(罗卓荆),CUIHai-xiang(...  相似文献   

8.
THREE┐DIMENSIONALMOTIONMEASUREMENTOFTHEAT┐LANTOAXIALJOINTLUYi-sheng(卢一生),JIALian-shun(贾连顺),DINGZhu-quan(丁祖泉),DAILi-yang(戴力扬)O...  相似文献   

9.
CLINICALANDEXPERIMENTALSTUDIESONRENALINJURIESAFTEREXTRACORPOREALSHOCKWAVELITHOTRIPSYFANGYu-hua(方玉华),JIANGJun(江军),DUWei-guo(都卫...  相似文献   

10.
EXPERIMENTALSTUDYOFGUNSHOTINJURYOFTHESPINALCOKD:THEMECHANISMANDCLASSIFICATIONSiuShao-ting肯少汀ZhangLi-ren张立仁GeZhen-shan葛振山Cheng...  相似文献   

11.
One of the factors of the successful military career guidance Cadet schools students is preserving and promoting their health. Medical support of children and adolescents aged 10-17 years should include the full range of medical and preventive measures defined for this group. The state of providing outpatient care for pupils at the Cadet School in St. Petersburg was studied. These results show that full medical care in accordance with the standards can be based only on children's health clinics. It is important that the organization of medical support pupils cadet schools should be cooperate with civilian health care.  相似文献   

12.
带状疱疹是由水痘—带状疱疾病毒引起的皮肤科常见疾病。其主要的病理损害,一是受累神经的严重炎症性浸润,继而导致受侵犯神经节内神经细胞变性、坏死;二是皮肤的水泡。迅速抑制神经节和相应的感觉神经纤维的充血、水肿和坏死,防止粘连形成,达到迅速镇痛、改善皮损,缩短病程及防止后遗症的发生是治疗的关键。因而,尽早明确诊断,  相似文献   

13.
14.
15.
16.
ESR-spectrometry was used to investigate radiation-induced paramagnetic centers in enamel of mammals: carnivores (polar bear and fox), ungulates (reindeer, European bison, moose), and man. Values at half the microwave power saturation of the radiation signal, P1/2, evaluated at room temperature, was found to range from 16 to 26 mW for animals and man. A new approach to discrimination of the radiation induced signal from the total ESR spectrum of reindeer enamel is proposed. ‘Dose-response’ dependencies of enamel of different species mammals were measured within the dose range from 0.48 up to 10.08 Gy. Estimations of ‘radiosensitivity’ enamel of carnivores and ungulates showed good agreement with radiosensitivity enamel of man by ESR method.  相似文献   

17.
18.
The results of an international comparison of activity measurements of a solution of 55Fe organized by the BIPM in 2005 are reported and analysed. This exercise, which follows the procedures of the CIPM mutual recognition arrangement to update older comparisons, is a renewal of the comparison organized by the BIPM that took place in 1978. A EUROMET comparison was organized in 1996 specifically to compare activity measurements of a 55Fe solution by means of liquid-scintillation techniques. Results of these three comparisons are presented and discussed in this paper.

The radionuclide solution was provided by the NPL, which also distributed the samples to the participants. The activity of the ampoules was measured by 16 laboratories using 12 methods producing 25 results. Some general considerations on uncertainty assessments pertaining to the different techniques used are drawn. The outcome of four different estimators is compared from which the presence of at least one outlier can be confirmed. Further measurements should be made to try to reduce the discrepancy between the results. To date the outcome of the present comparison does not show an improvement to that of the 1996 comparison.  相似文献   


19.
A new method of non-surgical treatment of varicocele syndrome is described: it consists in sclerotherapy of spermatic vein by trans-femoral percutaneous catheterization with balloon-catheters. In 8 cases venous thrombosis has been induced by direct electric clotting. The techniques and a 6 months follow-up are discussed. It is pointed out that this procedure should be considered as the method of choice for tubular lesions and sub-fertility prophylaxis in young people and in childhood.  相似文献   

20.
目的探讨延迟性脾破裂误漏诊原因和预防措施.方法回顾性分析总结12例延迟性脾破裂中的诊断和误漏诊的经验与教训.结果本组延迟性脾破裂的误漏诊5例(41.66%).对多发伤与脾破裂并存可能认识不足,外伤史轻微或伤员隐瞒外伤史,缺乏腹痛-缓解-突然再腹痛的典型病史,缺乏“对冲性脾破裂”力学分析和整体化诊断思路等为其误漏诊的主要原因.结论详细的外伤史和全面系统检查,重视腹以外多发伤掩盖腹内脏器伤及延迟性脾破裂可能.确立外伤-腹内脏器伤-脾破裂整体化诊断思路.不间断地辅以B超检查脾形态学变化和腹内有无积液,腹腔穿刺确定有无血腹、X线胸腹部检查观察左侧胸肋角和膈肌运动情况、必要时CT检查以尽早发现脾包膜下血肿,降低延迟性脾破裂误漏诊率.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号