Abstract:Objective To investigate the effect of sevoflurane on the intrapulmonary shunt in patients with single-lumen endotracheal tube combined with CO2 artificial pnumothorax in the totally minimally invasive esophagectomy. Methods Totally 60 patients were randomly divided into two groups with 30 subjects in each group: control group (group A) and sevoflurane group (group B). Arterial blood gases, mixed venous blood gases, and shunt fraction (Qs/Qt) were analyzed at 0 minute (T1), 30 minutes (T2), 60 minutes (T3), 90 minutes (T4) after artificial pneumothorax. Results There was no statistical significance between the two groups in terms of HR and MAP at four points (P?>?0.05), but differences existed in the comparison of shunt fraction (P?0.05). Compared with T1, intrapulmonary shunt of two groups increased at T2, T3, and T4 (P?0.05), and it is the highest at T3. Comparing with the group A at the T3 and T4 points, pulmonary shunt fractions was statistically significant (P?0.05), which showed sevoflurane was higher in group B than in group A, but there was no statistical significance at the rest of the time points (P?>?0.05). Conclusions Compared with intravenous anesthesia, the use of 1.0 MAC sevoflurane in patients with single-lumen endotracheal tube combined with CO2 artificial pnumothorax in the totally minimally invasive esophagectomy may increase intrapulmonary shunt.