non-suppurative otitis media eustachian tube disease UMLS_CUI:C0155435 disease_ontology SNOMEDCT_US_2020_03_01:194277003 ICD9CM:381.8 DOID:9739 A non-suppurative otitis media and eustachian tube disorder in which the tube is either too narrow or too wide. It can also be cuased by nasal inflammation which leads to inflammatory swelling and obstruction of the eustachian tube, which, in turn, leads to increased negative pressure in the middle ear and improper ventilation.