A 47-year-old male, ASA 1 patient presented for nasal endoscopy as part of his investigation for sleep-disordered breathing. Flexible endoscopy -was planned via a laryngeal mask airway (LMA) as part of a modified sleep endoscopy protocol [1] to detect any stenoses of the subglottis and trachea. Anaesthesia was induced with sevo-flurane 8% in 50% oxygen and air and a size 4 LMA (LMA classic®; Intavent Orthofix Ltd., Berkshire, UK) inserted and inflated with 30 ml air. A circle anaesthesia system was connected and the patient allowed to breath spontaneously with good tidal volumes.
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