IN SELECTED cases of clinical otosclerosis the fenestration operation has proved of definite value in restoring practical, serviceable hearing.
It is generally accepted that any patient with a bilateral conductive type of hearing impairment who has intact ear drums and patent eustachian tubes and who does not exhibit other obvious pathologic condition of the ear may be considered as having clinical otosclerosis.
It is likewise generally accepted that patients with clinical otosclerosis who are not over 60 years of age and who are in good health are suitable for the fenestration operation, provided they have reasonably good function of the cochlear nerve.
The degree of function of the cochlear nerve is determined by both tuning fork and audiometric testing. If the patient with clinical otosclerosis has loss of serviceable hearing, the duration of bone conduction over air conduction with a 1024 fork is in direct proportion to the difference between
HOUSE HP. INDICATIONS FOR THE FENESTRATION OPERATION. Arch Otolaryngol. 1947;45(3):312–318. doi:10.1001/archotol.1947.00690010323006