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目的 探讨高碳酸血症时大鼠全身性水肿发生的机理。方法 给大鼠呼吸高浓度二氧化碳气体(8 % C O2 、21 % O2 ,71 % N2) ,每天7 小时,连续4 周。观察高碳酸血症大鼠各项指标的变化,并设对照组。结果 对照组平均肺动脉压(m P A P) 为(194 ±028) k Pa, Pa C O2 为(46 ±09) k Pa 。大鼠循环血中125 I牛血清白蛋白半排出时间( T1/2) 为(238 ±30) min ;血浆过氧化脂质( L P O) 为(30 ±06)nmol/ml,红细胞超氧化物歧化酶( S O D) 活性为(1 042 ±135) U/g Hb 。肺组织中水含量为(762 ±10) % ,肌组织为(741 ±28) % 。高碳酸血症组m P A P 为(20 ±04) k Pa 、 Pa C O2 为(74 ±04) k Pa 、 T1/2 为(150 ±23) min 、 L P O 为(88 ±20) nmol/ml、 S O D 为(682 ±341) U/g Hb 、肺组织中水含量为(788±18) % 、肌组织为(760 ±10) % 。两组比较m P A P 差异无显著意义( P> 005) ; Pa C O2 、
Objective To investigate the mechanism of systemic edema in rats with hypercapnia. Methods Rats were exposed to high concentrations of carbon dioxide gas (8% C O2, 21% O2, 71% N2) for 7 hours a day for 4 weeks. Observation of hypercapnic rats various indicators of change, and set the control group. Results The average pulmonary arterial pressure (m P A P) in the control group was (194 ± 028) kPa, Pa C O2 was (46 ± 09) kPa. The half-time of 125 I bovine serum albumin (T1 / 2) in circulating blood of rats was (238 ± 30) min, and the plasma lipid peroxidation (L P O) was (3 ± 0 6) nmol / ml, and the activity of erythrocyte superoxide dismutase (SOD) was (1042 ± 135) U / g Hb. The water content in lung tissue was (762 ± 10)% and the muscle tissue was (741 ± 28)%. In the hypercapnia group, m P A P was (2 ± 04) k Pa, Pa C O2 was (74 ± 04) kPa, and T1 / 2 was (150 ± 23) P O was (8.2 ± 2.0) nmol / ml, S O D was (682 ± 341) U / g Hb, and water content in lung tissue was (788 ± 18)%. (760 ± 10)%. There was no significant difference in mP A P between the two groups (P> 005); Pa C O2,