低压低氧环境对肺气肿大鼠肺组织结构影响的研究
发布时间:2018-05-27 10:16
本文选题:低压低氧 + 香烟烟雾提取物 ; 参考:《青海大学》2014年硕士论文
【摘要】:目的:观察不同海拔肺气肿大鼠的平均内衬间隔(mean linear intercept,MLI)、破坏指数(destructive index,DI)、单个肺泡面积(area of pulmonary alveoli,,APA)、单位面积肺泡数(Density of pulmonary alveoli,DPA),研究低压低氧环境对肺气肿大鼠肺组织结构的影响。 方法:将40只Wistar大鼠按随机数字表随机分为中海拔(2260m)空白对照组、中海拔盐水组、中海拔肺气肿组及高海拔盐水组和高海拔肺气肿组(模拟海拔5000m,压力:52889Pa~53001Pa,氧分压:42mmHg,新风量:110~189m3/h,温度:16.9℃-24℃,湿度:37.3%-51%)。盐水组及肺气肿组连续四周每周一次腹腔内注射0.8ml生理盐水及香烟烟雾提取物(Cigarette smoke extract,CSE)。病理切片苏木素-伊红染色后,测定MLI、DI、APA、DPA。 结果:中海拔肺气肿组MLI(189.22±27.96um)、 DI(53.34±6.54%)、APA(5740.12±749.25um2)较中海拔盐水组(158.30±28.37um,20.90±3.57%,3101.25±763.43um2)明显升高(p0.001),DPA(184.53±30.18mm2)较中海拔盐水组(334.02±50.02mm2)明显减少(p0.001);高海拔肺气肿组MLI(226.61±27.51um)、DI(73.98±6.97%)、APA(10606.83±923.057um2)较高海拔盐水组(193.13±24.66um、57.64±6.72%、5399.42±1058.47um2)均明显升高(p0.001),DPA(88.84±5.67mm2)较盐水组(182.11±39.79mm2)明显减少(p0.001)。高海拔盐水组MLI、DI、APA均较中海拔盐水组显著升高(p0.001),DPA显著降低(p0.001);高海拔肺气肿组MLI、DI、APA较中海拔肺气肿组均明显升高(p0.001),DPA显著降低(p0.001)。 结论:高海拔肺气肿组肺组织MLI、DI、APA较中海拔肺气肿组比较均显著升高,DPA显著减少,说明低压、低氧环境加重肺气肿大鼠肺组织结构的破坏。
[Abstract]:Objective: to study the effects of low pressure hypoxia on lung tissue structure of emphysema rats at different elevations by observing the mean linear interceptance of MLI, the damage index of destructive index, the single alveolar area of pulmonary alveolar area, and the number of alveoli of pulmonary alveolus DPAA per unit area in rats with emphysema. Methods: forty Wistar rats were randomly divided into two groups: middle altitude 2260 m) control group and middle altitude saline group. Middle altitude emphysema group, high altitude saline water group and high altitude emphysema group (simulated altitude 5000m, pressure: 52889Pa53001Pa, oxygen partial pressure: 42mmHg, fresh air volume: 11010189m3 / h, temperature: 16.9 鈩
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