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诱导性一氧化氮合酶抑制药对感染性休克兔肠系膜微循环的影响 |
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宋冰冰 王俊科 盛卓人 崔涌 孙新艳
摘要 目的:观察iNOS抑制药AG对感染性休克兔肠系膜微循环功能的影响。方法:大耳白兔输注LPS(300μg.kg-1.h-1)。MAP下降至基础的60%后2小时将受试动物随机分为L-NAME(30mg.kg-1,n=6)和AG(20mg.kg-1,n=6)2组。结果:MAP下降后2小时肠系膜微动静脉明显扩张。给予L-NAME后微动脉内径减少45%,比基础值减少15%(P<0.05);微静脉内径减少20%,但与基础无差异。给予AG后微动脉内径减少30%(P<0.05),而比基础值增加8%。L-NAME组微动脉明显细于AG组。给LPS后血流速度明显减慢。L-NAME使之进一步减慢,而AG对流速有一定改善。结论:AG对肠系膜血管内径和血流速度影响小,可在一定程度上改善感染性休克兔的微循环。 关键词 微循环 休克,感染性 氨基胍
The effects of inducible nitric oxide synthase(iNOS) inhibitor on the microcirculation of the rabbits mesenterium in septic shock Song Bingbing,Wang Junke,Sheng Zhuoren,et al.Department of Anesthesiology of the First Affiliated Hospital of China Medical University,Shenyang 110001 Abstract Objective:To investigate the effects of AG,an iNOS inhibitor on microcirculation of the septic shock rabbits.Method:The white rabbits were infused endotoxin(LPS,300μg.kg-1)in 1h.Two hours after the MAP decreased to 60% of the baseline,the rabbits were grouped randomly as L-NAME(n=6,30 mg.kg-1)I.V.group and AG(n=6,20 mg.kg-1)I.V.group.Result:Two hours after MAP decreased,the blood velocity decreased,the arteriolar of mesenterium dilated by 18%(P<0.05),the venula dilated only by 7%(P<0.05).After injection of L-NAME,the arteriolar constricted by 15% compared with baseline,by 45% compared with pretreatment,the diameter of venula was 20% less than pretreatment,not less than baseline.The velocity continued to decrease.After injection of AG,the arteriolar constricted by 30%, but still dilated by 8% compared with baseline,the velocity improved.Conclusion:AG has little effects on the arteriolar and blood velocity,can improve the mesenterium microcirculation of the rabbits in septic shock to some extent. Key words Microcirculation Shock,septic Aminoguanidine
感染性休克发生过程中,细菌的毒素等可激活血管内皮细胞中一氧化氮合酶(NOS),引起各脏器微循环的改变,导致组织灌注不足。非选择性NOS抑制药L-N-位硝基精氨甲酯(L-NAME)能引起血管明显收缩,进一步加重组织氧供不足。但未见有关诱导性NOS(iNOS)抑制药氨基胍(AG)对微循环影响的报道。本实验的目的比较研究L-NAME和AG对感染性休克[1] [2] 下一页 上一个医学论文: 二乙胺控制性降压对氧供 氧耗及血乳酸浓度的影响 下一个医学论文: 全麻下经胸食管癌切除前后病人外周血TNF T淋巴细胞及其亚群的改变
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