Induction of anesthesia
incisors, perioral duct tape
PAD, CAVITY
All patients were given an intravenous infusion of 0.01 mg/kg of penehyclidine hydrochloride 10 min before being anesthetized, and anesthesia was induced intravenously with 2.0 mg/kg of propofol, 0.3–0.5 μg/kg of sufentanil, and 0.2 mg/kg of cisatracurium. When the bispectral index (BIS) value was close to 50, the DLT was directly inserted with the help of a fiberoptic bronchoscope, and its position was determined. The DLT was then fixed after verification of good alignment between the bronchial cuffed end of the DLT and the bronchial opening, with a tracheal cuff inflation pressure of 40 mmHg for large cuffs and 35 mmHg for bronchial cuffs. The depth of the DLT position and the alignment of the opening were recorded.In group I, dental pads were placed in the traditional way and secured with adhesive tape at the periportal end of the DLT. Specifically, after the end of the DLT was accurately positioned by fiberoptic bronchoscopy, a plastic dental pad was placed between the maxillary and mandibular teeth of the patient ‘s mouth, and then two cloth tapes with a width of 1 cm and a length of 35 cm were used to bind the DLT and the plastic dental pad for two laps, and then the ends of the tape were attached to the skin of the patient ‘s cheek. All patients in group I were operated by the same anesthesiologist. While in group II, dental pads were inserted without periportal fixation of the DLT, allowing the tube to slide freely and smoothly between the maxillary and mandibular teeth. In the process of patients changing from horizontal position to lateral position, whether it is group I or group II, the anesthesiologist cooperates with the surgeon to take both hands to hold the patient ‘s head for axial rotation of 90 degrees. In group II, a plastic dental pad is routinely placed in the oral cavity to open the upper and lower incisors, so that the DLT can slide freely between the maxillary and mandibular teeth, and the anesthesiologist does not need to specially fix the catheter to prevent displacement. Patients in both groups were then moved from a horizontal to a lateral position after 10 min, and a Tiro anesthesia machine (Drager, Germany) was connected for mechanical ventilation with pure oxygen. See Group II patients without perioral duct tape fixation.Group I patients with perioral duct tape fixation.