Tino Just1, Ellen Guder, Hans Wilhelm Pau. 1. Department of Otorhinolaryngology, Head and Neck Surgery, University of Rostock, Doberaner Strasse 137-139, D-18057 Rostock, Germany. tino.just@med.uni-rostock.de
Abstract
OBJECTIVE: To compare three stapedotomy modalities used to fenestrate 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 CO(2) laser stapedotomy, perforator) depending on the modality used for stapedotomy. Bone conduction (BC) and air conduction (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 8kHz after 2-shot laser stapedotomy. A significant drop in AC or BC was not found in any of 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 8kHz after a second shot CO(2) 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.
OBJECTIVE: To compare three stapedotomy modalities used to fenestrate 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 CO(2) laser stapedotomy, perforator) depending on the modality used for stapedotomy. Bone conduction (BC) and air conduction (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 8kHz after 2-shot laser stapedotomy. A significant drop in AC or BC was not found in any of 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 8kHz after a second shot CO(2) 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.
Authors: Dan Bagger-Sjöbäck; Karin Strömbäck; Malou Hultcrantz; Georgios Papatziamos; Henrik Smeds; Niklas Danckwardt-Lillieström; Bo Tideholm; Ann Johansson; Sten Hellström; Pierre Hakizimana; Anders Fridberger Journal: Sci Rep Date: 2015-08-21 Impact factor: 4.379
Authors: Dan Bagger-Sjöbäck; Karin Strömbäck; Pierre Hakizimana; Jan Plue; Christina Larsson; Malou Hultcrantz; Georgios Papatziamos; Henrik Smeds; Niklas Danckwardt-Lillieström; Sten Hellström; Ann Johansson; Bo Tideholm; Anders Fridberger Journal: PLoS One Date: 2015-03-12 Impact factor: 3.240