Effect of the stapedotomy technique on early post-operative hearing results-Preliminary results

Objective: To compare three stapedotomy modalities used to fenestra,:e the stapes footplate in patients with primary otosclerosis. Materials: The non-randomized and unblinded one-center study included 48 patients with primary otosclerosis who underwent stapes surgery between May 2008 and April 2009. The patients were divided into three groups (single shot and two-shot CO2 laser stapedotomy, perforator) depending on the modality used for stapedotomy. Bone conduction (BC) and air conduct ion (AC) thresholds, air-bone gap (ABG), and the difference between mean pre-operative and 2- to 3-week post-operative BC thresholds were analyzed. Results: The temporary BC deterioration was most pronounced at 6 and 8 kHz after 2-shot laser stapedotomy. A significant drop in AC or BC was not found in any cf our 48 patients. Age, high-dose cortisone therapy, and 'preoperative hearing' did not influence the post-operative hearing results. Conclusion: Even though the number of patients presented here was small and statistical analysis was limited, the study showed a trend toward worse BC thresholds at 6 and 8 kHz after a second shot CO2 application. Whenever possible, treatment should avoid a second laser shot on the already opened inner ear with the laser parameters used for the initial shot. (C) 2011 Elsevier Ireland Ltd. All rights reserved.