Endolymphatic Sac Surgery
The endolymphatic sac decompression operation is performed by making an incision behind the involved ear and exposing the mastoid bone. The mastoid is opened, and the facial nerve is identified in its course through the mastoid. The bone over the endolymphatic sac is then exposed and once identified, the sac is opened. A non-reactive sheet of silastic or a valve is inserted into the sac to allow for future drainage, when fluid reforms.
The operation takes about an hour. It is usually performed on an outpatient basis.