Video laryngoscope is a new tracheal intubation device that can provide indirect view of the upper respiratory tract. In terms of difficult airway management and treatment, compared with direct laryngoscope, video laryngoscope can improve the Cormack-Lehane classification of glottis exposure and can achieve the same or higher tracheal intubation success rate in a shorter time. Although video laryngoscopes can obtain very good glottic exposure, sometimes insertion and advancement of tracheal tubes when using video laryngoscopes can fail. Depending on the circumstances that the anesthesiologist needs to deal with, the characteristics of each specific device have advantages and disadvantages.

The video laryngoscope is a new tracheal intubation device containing a camera and a recording device, which enables the operator to reveal the glottis indirectly. The design ofvideo laryngoscopes is similar to traditional laryngoscopes, allowing clinicians skilled in direct laryngoscope operations to successfully apply them without any special training. At present, severalvideo laryngoscopes with different specifications, different user interfaces and different geometric shapes have been produced.