 <unk> <unk> have become increasingly available since the 1990s . In contrast to the conventional laryngoscope , these devices allow the laryngoscopist to indirectly view the larynx . This provides a significant advantage in situations where the operator needs to see around an acute bend in order to visualize the glottis , and deal with otherwise difficult <unk> . Video laryngoscopes are specialized fiberoptic <unk> that use a digital video camera sensor to allow the operator to view the glottis and larynx on a video monitor . Other " noninvasive " devices which can be employed to assist in tracheal intubation are the laryngeal mask airway ( used as a conduit for endotracheal tube placement ) and the <unk> . 
