Subjects
upper respiratory tract infection, reflux
UPPER RESPIRATORY TRACT INFECTIONS, BRONCHIAL ASTHMA, MORBID OBESITY, REFLUX
This single-center study was approved by the University’s Institutional Ethical Committee (Plastic Surgery Hospital Ethical Committee No.ZX2021–12, Beijing, China) and the trial was registered prior to patient enrollment at Our hospital is the largest ear reconstruction center in China with 2000 ear reconstruction surgeries per year. Between June 2022 and nov 2022, children with microtia, scheduled for elective surgery under general endotracheal anesthesia.Inclusion criteria: we obtained written informed consent from patients’ guardians, ASA I–II, with ages between 5 and 15 years, gender unrestricted; 18 kg/mExclusion criteria: ASA III–IV, History of upper respiratory tract infection within 2 weeks; the presence of risk factors for gastric reflux or aspiration; bronchial asthma; morbid obesity (BMI>30 kg/mThe study investigators were three anaesthesiologists very well experienced in using different kinds of laryngeal mask devices.