CO2气腹对糖尿病兔胰腺功能影响的实验研究

目的探讨二氧化碳（CO2）气腹对糖尿病兔胰腺功能的影响。方法利用四氧嘧啶制作糖尿病兔模型,建立不同压力气腹,观察气腹前和气腹后0、2、6及12h各时间点血糖、淀粉酶、胰岛素、C肽、胰腺组织SOD活性及MDA含量的变化。结果气腹结束后,血糖、淀粉酶、胰岛素、C肽浓度和MDA含量较气腹前上升（P〈0.05）,SOD活性较气腹前下降（P〈0.05）。气腹结束后12h,10mmHg（1mmHg=0.133kPa）气腹组血糖、淀粉酶、胰岛素、C肽浓度和MDA含量与气腹前比较差异无统计学意义（P〉0.05）,15mmHg气腹组血糖、淀粉酶、胰岛素、C肽浓度和MDA含量仍较气腹前升高（P〈0.05）;SOD活性在2组均未恢复至气腹前水平（P〈0.05）。10mmHg和15mmHg气腹组相应时相之间,血糖和胰岛素变化差异无统计学意义（P〉0.05）,淀粉酶、C肽浓度、MDA含量和SOD活性变化差异有统计学意义（P〈0.05）。结论CO2气腹对糖尿病兔胰腺功能有损伤作用,损伤程度与气腹压力相关,较低的气腹压引起的胰腺损害更易逆转。

Effects of CO2 Pneumoperitoneum on Pancreatic Function in Diabetic Rabbits

Objective To explore the effects of CO2 pneumoperitoneum on pancreatic function in diabetic rabbits. Methods Forty-eight rabbits were divided into 4 groups: control group (the group of N0, n=4), the group of T0 (n=4), the group of T10 (n=20), and the group of T15 (n=20). The animal used in the groups of T0, T10 and T15 was diabetic rabbit, and the pressures of pneumoperitoneum of the three groups were 0 mm Hg, 10 mm Hg and 15 mm Hg respectively.The model of diabetic rabbits were made through intrvenous administration of Allxon. Arterial blood samples were collected before the onset of CO2 pneumoperitoneum, 0, 2, 6, 12 hours after deflation for measuring blood glucose, amylase, insulin and C-peptid. Then the rabbits were sacrificed and their pancreases were removed for measuring SOD activity and MDA content. Results After abdominal deflation, the blood glucose, amylase, insulin, C-peptid, MDA content were significantly increased (P<0.05), and SOD activity was significantly decreased(P<0.05). Twelve hours after abdominal deflation, the levels of blood glucose, amylase, insulin, C-peptid, MDA content returned to those before pneumoperitoneum was established in group T10. But, those in group T15 were higher (P<0.05) than the levels before insufflation. The SOD activities in both group T10 and group T15 twelve hours after abdominal deflation were significantly different (P<0.05) from those before pneumoperitoneum was established. There were statistically significant differences (P<0.05) between group T10 and T15 in amylase, C-peptid, MDA content and SOD activity. Conclusion CO2 pneumoperitoneum has an certain adverse influence on pancreatic function of the diabetic rabbits. The degree of injury is correlated with the pressure of pneumoperitoneum. Pancreatic function may returned to preoperative level soon after abdominal deflation in group T10, but did not return in group T15.