EFFECT OF NASOGASTRIC TUBES ON EUSTACHIAN-TUBE FUNCTION

The Eustachian tube acts as pressure equalizing tube between the nasopharynx and the middle ear. It also functions as a conduit for removal of secretions from the middle ear and mastoid air cell system into the post nasal space. Eustachian tube function may be assessed objectively using tympanometric measurements. (Brooks, 1968, Lutman, 1987). The post-operative use of nasogastric Ryles tubes is associated with reduced peak middle ear pressure (mmH2O) and reduced peak compliance volumes (ml) as assessed by tympanometry. In addition changes in the appearance of the tympanic membrane may occur with the protracted use of Ryles tubes. This phenomenon is a transient one. Nasogastric tube-induced Eustachian tube dysfunction is a previously unreported entity. © 1990, JLO (1984) Limited. All rights reserved.