Tympanoplasty is plastic surgery aimed at improving hearing by reconstructing the middle-ear conductive system and including an aerated cavity in the tympanic cavity. Tympanoplasty is unique among plastic surgeries in that an air space is created underneath grafts such as an eardrum or ossicles, and the grafted conductive system will be stable but well movable in the air space for a long time. To accomplish these requirements, as well as maintaining a good blood supply and adequate control of infection, a stable pressure regulation system in the middle ear is essential. Various tympanoplasty techniques have been developed to stabilize the reconstructed conductive system as well as to ensure a good blood supply to improve the take-rate of the grafts. Unfortunately, however, unpleasant outcomes sometimes occur after surgery, such as retraction and adhesion of the graft, or retention of fluid in the middle ear. This is partly because it is still unclear how the conditions of the ventilation or pressure-regulation systems of the middle ear, particularly the transmucosal gas exchange function, are altered after surgery.
KeywordsEustachian Tube External Auditory Canal Tympanic Cavity Mastoid Cavity Tympanostomy Tube
Unable to display preview. Download preview PDF.