Single-use Metal Laryngoscope Blades

In a randomised study of more than 1072 patients for emergency intubation using rapid sequence induction, single-use metal blades were associated with fewer failed first attempts and fewer poor grade laryngeal views than reusable metal blades. Improved illumination may be a factor.
Comparison of Single-use and Reusable Metal Laryngoscope Blades for Orotracheal Intubation during Rapid Sequence Induction of Anesthesia
Anesthesiology. 2010 Feb;112(2):325-32