Endoscopic Exploratory Tympanotomy: Our Experience
30 September 2019 (online)
Aim To enlist and analyze the middle ear pathologies in patients with conductive hearing loss with intact tympanic membrane by endoscopic exploratory tympanotomy.
Materials and Methods In this retrospective study, 88 patients in age group between 14 years and 50 years, with hard of hearing were evaluated. Clinical examination, pure tone audiometry and tympanometry were done for all patients. Patients with conductive hearing loss with intact tympanic membrane with no previous history of ear discharge were taken up for endoscopic exploratory tympanotomy, and operative findings noted.
Results In our study, most common middle ear pathology was otosclerosis (69%). Other middle ear causes for conductive hearing loss were tympanosclerosis, mucosal adhesion bands, and middle ear anomalies. Ten patients underwent revision stapedotomy, while seven patients had normal middle ear findings despite conductive hearing loss. Other anatomical abnormalities posing challenge for stapedotomy in confirmed otosclerosis included dehiscent fallopian canal and dehiscent high-lying jugular bulb.
Conclusion and Clinical Significance The study provides us insight into various causes of conductive hearing loss behind an intact tympanic membrane with no previous history of ear discharge. The advantage of endoscopic exploratory tympanotomy was clear view of middle ear anatomy and aiding as an excellent teaching tool.