Devices include Video laryngoscopes Laryngeal mask airways (LMAs) with a passage that allows tracheal intubation Other supraglottic airways Fiberoptic scopes and optical stylets Tube introducers Each device has its own subtleties; practitioners who are skilled in standard laryngoscopic intubation techniques should not assume they can use one of these devices (especially after the patient as been given muscle relaxants) without becoming thoroughly familiarized with it.