Chevalier Jackson's contributions to direct laryngoscopy.

Chevalier Jackson championed rigid endoscopy of the upper aerodigestive tract and facilitated its development and popularity at the beginning of the 20th century. He realized that endoscopy and open surgery are inextricably linked for effective management of diseases of the upper air and food passages. Toward this end, Jackson contributed a number of important innovations to direct laryngoscopy, while developing a unique mastery of the technique. Ultimately, he combined this endoscopic proficiency with open surgical techniques.