The eustachian tube is the tube that runs between the middle ear and pharynx and regulates the ear pressure around the ear drum.
Review Date 8/5/2018
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.