To compare the effectiveness of different techniques of stapes surgery in improving the hearing of individuals with otosclerosis.
Methods and Design:
Large and small fenestra techniques, as well as the instrument used to make the fenestra (drill or laser), were compared with regard to effectiveness and rate of side effects. The charts of 875 patients who underwent primary stapedectomies performed by members of the House Ear Clinic, Los Angeles, Calif, were reviewed. Patients who underwent stapedectomy for reasons other than otosclerosis and those with inadequate postoperative bone conduction threshold data were excluded. A group of 550 patients met the criteria. This group was broken into categories depending on the technique of stapedectomy and the instrument used to create the fenestra. The techniques were then compared using air-bone gap closure at different frequencies, pure tone average, and the rate of significant side effects.
The study indicated that small fenestra stapedotomy and large fenestra techniques have similar rates of closure of the air-bone gap. Small fenestra stapedotomy has a slightly lower rate of postoperative sensorineural hearing loss, especially at higher frequencies. With regard to the small fenestra technique, there was no significant difference in either postoperative airbone gap closure or postoperative sensorineural hearing loss, regardless of whether the fenestra was created by laser or microdrill.
While we did find a statistically significant difference between the large and small fenestra techniques in postoperative sensorineural hearing loss at higher frequency, the difference is small and is probably not clinically significant. Therefore, we find that similar good results can be obtained by the experienced surgeon using either the large or small fenestra technique. Similarly, we found the laser and microdrill to be equally safe and effective in the creation of the fenestra.Arch Otolaryngol Head Neck Surg. 1997;123:177-180