Anesthesiology. 118(5):1059-1064, May 2013.
Retrograde light-guided laryngoscopy for tracheal intubation uses transtracheal light transmission from a source attached to the skin to illuminate the glottis. Nine residents, six medical students and five nurses who had never intubated a patient each attempted to intubate 10 patients, using direct laryngoscopy in five of them and retrograde light-guided laryngoscopy in five in a randomly assigned order. The overall success rate using direct laryngoscopy was 47% while that with retrograde light-guided laryngoscopy was 72%. The median cumulative times to glottis exposure and to tracheal intubation were decreased and glottic exposure was improved when retrograde light-guided laryngoscopy was used.