Colletti V, Fiorino F G, Sittoni V, Policante Z
ENT Department, Ospedale Policlinico, University of Verona, Italy.
Acta Otolaryngol. 1993 Sep;113(5):637-41. doi: 10.3109/00016489309135877.
Seventy-three otosclerotic patients, 138 subjects who had undergone stapes surgery (50 total stapedectomies, 43 stapedotomies with stapedius tendon section and 45 stapedotomies with stapedius tendon preservation) and 70 normal controls were investigated by susceptance multiple frequency tympanometry. The aims were to evaluate the efficiency of this procedure in diagnosing otosclerosis and to assess the resonance properties of middle ears undergoing different types of stapedectomy. Tympanometry was performed using sweep frequencies ranging from 226 to 2,000 Hz for each pressure step of 12.5 daPa (pressure range from -500 to 400 daPa). The resonance frequency of the system was evaluated by identifying the "W" morphology of susceptance tympanograms. The results of the present investigation indicate that stapes surgery abnormally reduces the stiffness of the tympano-ossicular system. This phenomenon is limited by preservation of the stapedius tendon, which confers a significant degree of stiffness on the conductive system.
对73例耳硬化症患者、138例接受过镫骨手术的受试者（50例行全镫骨切除术，43例行镫骨肌腱切断的镫骨足板钻孔术，45例行保留镫骨肌腱的镫骨足板钻孔术）以及70名正常对照者进行了导纳多频鼓室声导抗测试。目的是评估该检查方法在诊断耳硬化症方面的有效性，并评估接受不同类型镫骨切除术的中耳的共振特性。在12.5 daPa的每个压力步长（压力范围为-500至400 daPa）下，使用226至2000 Hz的扫频进行鼓室声导抗测试。通过识别导纳鼓室图的“W”形态来评估系统的共振频率。本研究结果表明，镫骨手术会异常降低鼓室-听骨链系统的劲度。这种现象因保留镫骨肌腱而受到限制，镫骨肌腱赋予传导系统显著程度的劲度。
