Registration:
Preoperative: Age, height, weight, medication, asthma/allergy, possible current respiratory infection
Peroperative: Type of procedure, tube size/laryngeal mask, type of tongue blade, highest/lowest SpO2, highest/lowest ET CO2, highest/lowest pulse, length of surgery, total operating
Participants were recruited from a single academic center. Subjects underwent screening at the Clinical Translational Science Center (CTSC) at Weill Cornell Medical College (WCMC). Study visits occurred at the CTSC where investigators administered and monitored questionnaires, compliance, adverse