From: Middle ear ventilation status postoperatively after translabyrinthine resection of vestibular schwannoma with mastoid obliteration and Eustachian tube occlusion: is the Eustachian tube enough to ventilate the middle ear without the mastoid air cell system?
Time interval post-op
Number of patients
Percent of patients
Less Than 6 Months
4/15
27 %
6–12 Months
6/15
40 %
12–24 Months
5/15
33 %