Measuring the benefit of buccal oxygenation in the apnoeic patient

INTERVENTION: In theatre patients will receive a standardised induction of anesthesia . For the the laryngoscopy (procedure to visualise the vocal cords and therefore entrance into the windpipe) and intubation (placement of the endotracheal tube into the windpipe) in the anaesthetised and apnoeic patient, the oxygen administration is traditionally interrupted for a short time until the breathing tube is connected to the ventilator. In this study the patients are either receiving additional oxygen (10 l/min flow) via a 3.5 mm RAE tube in the buccal space during laryngascopy or no additional oxygen. During artificially prolonged laryngoscopy the saturation will be recorded for a maximum of 10 min or until the saturation starts to drop to 95%. The patient will then be intubated and anaesthesia will be continued as per routine. CONDITION: Desaturation during laryngoscopy (anaesthesia) Obesity PRIMARY OUTCOME: Desaturation (SpO2 to 95%) monitored with pulse oximetry SECONDARY OUTCOME: NIL INCLUSION CRITERIA: 1) Adult patients requiring general anaesthesia with endotrachel intubation for scheduled surgery 2) BMI 30‐40 3) ASA1‐2 4) Agree to and capapble of understanding and signing the consent form