【摘要】 目的 研究不同壓力二氧化碳（CO2）氣腹對糖代謝的影響。 方法 18只雌性健康新西蘭大白兔按CO2氣腹壓力隨機均分為氣腹壓0 mm Hg （1 mm Hg=0.133 kPa）（Ⅰ組）、氣腹壓10 mm Hg（Ⅱ組）和氣腹壓15 mm Hg（Ⅲ組）。每組兔均在不同的壓力下接受氣腹1 h。在CO2氣腹前（T0）、氣腹后30 min （T1）、氣腹后60 min （T2） 測定動脈血氣分析值、血糖（Glu）、胰島素（Ins）和胰高糖素（Gln）。 結果 氣腹后30 min 、60 min，Ⅱ組與Ⅰ組比較，PaCO2、Glu 、Gln增加（Plt;0.05），pH值和Ins下降（Plt;0.05），Ⅲ組各參數變化更為顯著（Plt;0.01）。結論 CO2氣腹后機體可能處于較強烈的應激狀態，導致血糖升高。【Abstract】 Objective To study effects of different intraabdominal pressure of carbon dioxide (CO2) pneumoperitoneum on blood glucose level in rabbits. Methods Eighteen female healthy rabbits weighed 2.1-3.3 kg were randomly divided into three groups equally based on pneumoperitoneum pressure: 0 mm Hg (1 mm Hg=0.133 kPa) group (groupⅠ),10 mm Hg group (groupⅡ) and 15 mm Hg (groupⅢ). Each group received 1h pneumoperitoneum under diffent pressure. Blood samples were taken before CO2 pneumoperitoneum, at 30 and 60 minutes after pneumoperitoneum for the measure-ments of arterial blood gas, blood glucose (Glu), insulin (Ins) and glucone (Gln). Results After pneumoperitoneum at 30 and 60 minutes, compared with groupⅠ, PaCO2,Glu and Gln were significantly raised in groupⅡ(Plt;0.05), pH and Ins were markedly decreased (Plt;0.05). Even more significant changes were observed in group Ⅲ(Plt;0.01). Conclusion After CO2 pneumoperitoneum, body is in a relatively b stress, so blood glucose is decreased.
To investigate the change of the portal venous pressure (PVP), conjugated glycocholic acid (CGA) and pancreatic glucagon (PG) concentration in rats peripheral and portal venous blood in the course of experimental liver cirrhosis induced with carbon tetrachloride and to investigate the mentioned changes after portalazygous devascularization. The authors found that in the early stage of cirrhosis the PVP and the concentration of CGA and PG in peripheral venous blood were increased markedly, CGA in portal vein was decreased and PG in portal vein was increased in early stage of liver cirrhosis.With the extent of liver cirrhosis the indexes above changed more markedly. After portalazygous devascularization the concentration of CGA in peripheral vein in the cirrhotic rats was increased but PVP, the concentration of CGA in portal vein and PG in peripheral and portal vein did not change.There was no change in nornal rats. The results suggest that the variation in CGA in peripheral vein can accurately reflect the degree of damage to liver cells, thus making the diagnosis of liver cirrhosis earlier and judging the degree and prognosis of liver cirrhosis.The concentration of PG in portal venous and peripheral vein relate to PVP in liver cirrhosis.Portalazygous devascularization can maintain PVP and PG in portal vein and do not affect liver function of the control rats but it can damage liver cell in cirrhotic rats.
The wister rats with cirrhotic portal hypertension induced by carbon tetrachloride/ethanal were divided into four groups;①distal splenocaval shunt(DSCS);②portal azygous devascularization (PAD);③mesocaval shunt side to side (MCS);and ④the conrol. Oral glucose toleronce test (OGTT), and glucagon loading test (GLT) were performed on them. The results revealed that the hepatic reserve function of the rats with DSCS and PAD had significant difference as compared with the control (Ｐ＜0.05), but that of the rat with MCS had no significant difference as compared with the control (Ｐ＞0.05).The present study indicates that the hepatic reserve function of rats with DSCS and PAD is better than that of the rats with MCS.