Tracheal intubation under general anaesthesia is the gold standard for securing the airway and for protecting the lungs against gastric aspiration. The conventional technique involves the use of a metal laryngoscope inserted into the mouth to create an air space, to allow insertion of an endotracheal tube. Alternatively, an oral airway device (called a supraglottic device (SGD)) can be used for tracheal intubation. The SGD is first inserted. A fibrescope is inserted down the shaft of the SGD and into the trachea. This allows an endotracheal tube (previously pre-loaded onto the fibrescope) to be railroaded of the fibrescope and into the trachea. This technique is called 'low skill fibreoptic intubation' as the SGD acts as a guide for the fibrescope. Our study compares the performance of two SGD: i-gel and air-Q. The investigators will compare intubation success rate, insertion rate, and times for SGD insertion and intubation.
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Success of low skill fibreoptic intubation using the i-gel or air-Q airway devices measured end tidal carbon dioxide levels
Timeframe: 3 minutes