Cochlear Implant Group, Pequeno Príncipe Hospital, Brazil.
Braz J Otorhinolaryngol. 2013 May-Jun;79(3):325-35. doi: 10.5935/1808-8694.20130058.
Otosclerosis causes the fixation of the stapes and conductive hearing loss, usually corrected with the use of hearing aids or through stapedotomy and the replacement of the involved stapes with a prosthesis. Titanium has been the most recently used material of choice in stapedotomy prostheses. Only two prostheses are commercially available in Brazil. There are no reports in the literature on the Fisch-type Storz titanium stapes piston prosthesis.
This retrospective study aims to look into the auditory outcomes of patients submitted to stapedotomy and titanium stapes piston prosthesis implantation.
The criteria described by the American Academy of Otolaryngology were used to compare pre and postoperative air-bone gaps seen in audiometry tests.
The mean low-frequency postoperative air-bone gap was 12.9 dB; the mean high-frequency air-bone gap was 5.2 dB (mean 9.1 dB); median gap was 8.8 dB, with a minimum of 1.3 dB and a maximum of 21.6 dB; standard deviation was 5.7 dB, and p < 0.001. Twenty-five (75.8%) patients had air-bone gaps of 10 dB and under; 32 (96.9%) patients had gaps of 20 dB and under; and all patients had gaps of 30 dB and under.
The Fisch-type titanium stapes piston prosthesis presented outcomes consistent with the literature and can be used safely in stapedotomy procedures.
耳硬化症导致镫骨固定和传导性听力损失，通常通过使用助听器或通过镫骨切开术并用假体替换受累的镫骨来纠正。钛是最近在镫骨切开术假体中使用的首选材料。巴西只有两种市售的假体。文献中没有关于 Fisch 型 Storz 钛质镫骨活塞假体的报道。
本回顾性研究旨在研究接受镫骨切开术和钛质活塞假体植入术的患者的听力结果。
使用美国耳鼻喉科学院描述的标准来比较听力测试中术前和术后的气骨间隙。
平均低频术后气骨间隙为 12.9 dB；平均高频气骨间隙为 5.2 dB（平均 9.1 dB）；中位数间隙为 8.8 dB，最小值为 1.3 dB，最大值为 21.6 dB；标准差为 5.7 dB，p < 0.001。25 例（75.8%）患者的气骨间隙为 10 dB 及以下；32 例（96.9%）患者的气骨间隙为 20 dB 及以下；所有患者的气骨间隙均为 30 dB 及以下。
Fisch 型钛质活塞假体的结果与文献一致，可安全用于镫骨切开术。
