Abstract:Objective To investigate the application effect of ultrasound-guided superior laryngeal nerve block combined with ZX-KSHJ visual laryngoscope on awake tracheal intubation in obese patients.Methods 120 obese patients underwent tracheal intubation general anesthesia from January 2018 to January 2020 were selected as the research objects, and the patients were divided into two groups by random number table method, with 60 cases in each group. The observation group was treated with ultrasound-guided superior laryngeal nerve block combined with ZX-KSHJ visual laryngoscope tracheal intubation, while the control group was treated with ultrasound-guided superior laryngeal nerve block combined with traditional optical laryngoscope tracheal intubation. The success rate of glottic exposure, one-time success rate of tracheal intubation, total success rate of intubation, mean intubation time, incidence and degree of cough during intubation, hemodynamic and intubation-related complications were observed in the two groups.Results The success rate of glottis exposure and one-time success rate of tracheal intubation in the observation group were higher than those in the control group (P < 0.05), the average successful intubation time were shorter those that in the control group (P < 0.05), heart rate (HR), systolic blood pressure (SBP), and diastolic blood pressure (DBP) at 1 min (T1), 5 min after intubation (T2) were lower than those in the control group (P < 0.05), percutaneous arterial oxygen saturation (SpO2) was higher than that in the control group (P < 0.05), the overall incidence of complications such as oral bleeding, throat damage, airway damage was lower than that in the control group (P < 0.05).Conclusion Ultrasound-guided superior laryngeal nerve block combined with ZX-KSHJ visual laryngoscope tracheal intubation can improve the success rate of glottic exposure and one-time intubation in obese patients, and reduce the risk of hemodynamic fluctuations and intubation related complications.