Discussion
postoperative atelectasis, atelectasis
POSTOPERATIVE ATELECTASIS, ATELECTASIS

In this randomised study, we found no significant differences in the percentage of postoperative atelectasis volume in patients ventilated with 30% FiO
Recently, a large number of clinical trials have compared the effects of high FiO
In the present study, the areas of different aeration were automatically measured using a workstation software. It was found that there were no significant differences between the two groups regarding the percentages of over-aeration, normal-aeration, and poor-aeration volumes. These results were consistent with the volume of atelectasis. In addition, there was no significant difference in the oxygenation index at the end of surgery between the two groups. The oxygenation index is an index to evaluate the gas exchange in the lung, and it is correlated with atelectasis [
It should be noted that the study is not without limitations. Firstly, the effect of recovery of spontaneous breathing after extubation on atelectasis could not be completely excluded. Secondly, the generalizability of the study is slightly weakened by the mode of mechanical ventilation. In order to explore the effect of intraoperative FiO