Discussion
dislocation
PAD
In the present study, there were no differences between the two groups in general characteristics, and the DLT model was selected in such a way as to minimize the influence of the tube’s thickness (too thick or too thin) on the results.Many previous studies have examined how to reduce the dislocation and misalignment of the bronchial cuffed end of the DLT during changes in a patient’s position. Karabiyik et al. [In the present study, the rate of dislocation rate in group I was 44.6%, which was generally consistent with the data reported by Klein et al. [There are two main factors that lead to tube dislocation and misalignment during the process of changing a patient’s position from horizontal to lateral: first, the forward flexion, backward tilt, and axial rotation of the head and neck; and second, the gravitational effect of the lungs and mediastinum in the lateral position, which causes a relative dislocation of the cuffed end of the DLT in relation to the bronchial opening. In the present study, it was observed that an average of 1.5 cm of outward dislocation occurred at the periportal end of the DLT in group II, which was generally consistent with the data reported by Benumof et al. [The present study had some limitations, mainly that there was no fixation at the peripheral end of the DLT, which increased the risk of accidental removal; such removal requires the anesthesiologist to change the patient’s position again. To address this limitation, the creation and implementation of a special dental pad and tube holder is planned for future work, which will allow the tube to slide freely and smoothly at the periportal end while also preventing its accidental removal.