A comparison of the AuraGain laryngeal mask with the LMA Supreme - a cross-over study

1. Insertion of the AuraGain laryngeal mask a) The AuraGain laryngeal mask is inserted through patient´s mouth and down to the perilaryngeal area (down airway) to keep the airway open during anaesthesia. The cuff at the end of the tube is then inflated to form a seal. The device is kept in place for the duration of surgery. b) time of insertion and time of device removal - the device is inserted at start of general anaesthesia and removed on emergence post surgery. c) the device is inserted by a doctor with a Board Certification in Anaesthesia - anaesthetist d) approximate duration of the mask in place is five minutes for the first allocated mask, and for second mask the average time is approximately 1 hour, dependent on surgical procedure. e) features differing from the control/comparator mask - broader breathing channel than LMA Supreme, gastric channel is not incorporated in the middle of the breathing tube (such as in the LMA Supreme) but in front of it. 2. Achievement of the cross-over design in the clinical setting. With a patient already under general anaesthesia, patient will have the first allocated mask inserted, with number of attempts and time taken for insertion recorded. The seal pressure will then be recorded and 5 minutes after insertion, the mask will be removed. After a 1 minute washout period, the second mask will be inserted with attempts, timing and seal pressure recorded. This mask will stay in place for the duration of the surgical procedure until emergence from anaesthesia.