Fig. 2From: Noninvasive carbon dioxide monitoring in pediatric patients undergoing laparoscopic surgery: transcutaneous vs. end-tidal techniquesLinear regression analysis between PetCO2 on the y-axis and PaCO2 on the x-axis during laparoscopic surgery (pneumoperitoneum time > 90 min) in pediatric patients. Linear regression equation: PetCO2 = 9.87 + 0.64 × PaCO2 (r2 = 0.69, P < 0.01, n = 128)Back to article page