慢性化脓性中耳炎鼓室硬化的临床分析

目的：探讨鼓室硬化在慢性化脓性中耳炎中的发生率、听力下降类型及听力下降与硬化灶部位和程度间的关系。方法：回顾性分析101例行手术治疗的慢性化脓性中耳炎患者的资料，所有患者均有完整的病史及耳鼻咽喉科体检，均行纯音测听检查，术中病灶均有详细记录。结果：慢性化脓性中耳炎患者鼓室硬化发生率为35．64％，大部分患者（77．78％）长期干耳，听力曲线为传导性聋。鼓膜硬化者中92．86％的患者气骨导间距小于40dB，而鼓膜与鼓室均有硬化者中45．45％的患者气骨导间距大于40dB。结论：鼓室硬化的听力损失与硬化灶的部位和程度直接相关。

Tympanosclerosis incidence among patients with chronic suppurative otitis media

Objective:To study the general incidence of tympanosclerosis among patients with chronic suppurative otitis media(CSOM),and to explore the type of hearing loss and the relationship between the hearing loss and the degree and site of tympanosclerosis in CSOM patients.Method:One hundred and one patients with CSOM were studied retrospectively.A full history was taken and thorough ENT examinations were carried out.Pure tone audiograms(PTA) of all patients were measured and analysed.The operative findings of tympanosclerosis were also inspected and analysed.Result:The incidence of tympanosclerosis was found to be 35.64 percent.Most tympanosclerosis cases had dry ear (77.78 per cent). The majority of hearing loss associated with tympanosclerosis was of the conductive type.Of the 92.56 percent who had myringosclerosis, the PTA showed an AB gap <40 dB.When sclerosis affected both tympanic membrane and middle ear, 45.45 per cent of patients had an AB gap >40 dB.Conclusion:The exact aetiology and pathogensis of tympanosclerosis is as yet not well known.There is a direct relationship between the degree of hearing loss and the degree and site of tympanlsclerosis.