Source:http://linkedlifedata.com/resource/umls/id/C1410072
UMD: Stents designed for deployment into the eustachian tube to maintain patency of the passage. These devices typically consist of a hollow, plastic, flanged tube that conforms to the inner contour of the eustachian tube; temporary stents are frequently made of biodegradable materials and may be capable of eluting a drug. They are usually positioned via the middle ear by insertion past the tympanic membrane; the flange secures the stent at the tympanic orifice of the eustachian tube. Eustachian tube stents are intended for ventilation and/or drainage of the middle ear cavity by enhancement of the lumen of the natural tube.