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Compared to artificial pneumothorax, the bronchial occlusion group has the following advantages the surgical exposure was better, the surgery duration was shorter, there was less intraoperative bleeding, and the duration of tracheal intubation was shorter (p 0.05); bronchial occlusion resulted in a lower MAP but a higher CVP in infants at T1, T2, and T3 (p 0.05) than the artificial pneumothorax group and resulted in a lower PaCO and higher PaO at T2, T3, and T4 (p 0.05). There was no significant difference in Ppeak between