C Hepatic tissue blood flow as a function of the level of CO 2 pneumoperitoneum. The data represent the mean hepatic tissue blood flow for four pig livers and the standard error of the means. A Ultrasound image of the suprahepatic inferior vena cava without evidence of gas embolus. B Ultrasound image of the suprahepatic inferior vena cava after infusion of 10 ml of CO 2 gas. Ultrasound image of the suprahepatic vena cava following an infusion of 10 ml of CO 2 gas.
Arrows indicate gas embolus.