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目的:探讨226Hz静态鼓室图与中耳共振频率诊断鼓室积液的价值,观察两者结合可否提高诊断效能。方法:前瞻性研究对比观察分泌性中耳炎组和对照组,以耳镜检查、纯音测听及GSI-33型中耳分析仪测试结果为标准,将对照组共振频率90%的可信区间(5%～95%)设为正常范围,对分泌性中耳炎组的共振频率进行正常或不正常归类,并对其鼓室图形为B、C型或异型者进行鼓膜穿刺抽液,以抽出液体者为阳性。结果:中耳共振频率在900～1100Hz之间为正常,分泌性中耳炎组的共振频率明显低于对照组(P<0.01)。B型曲线的抽液阳性率为83%,明显高于C型和异型曲线抽液阳性率(P<0.05)。共振频率正常者,其抽液阳性率为0。≤500Hz者的鼓室积液阳性率明显高于>500Hz者(P<0.01)。结论:通过测试中耳共振频率对判断鼓室是否积液,尤其是对鼓室图形为C型或异型者有重要临床意义。
Objective: To investigate the value of 226Hz static tympanogram and middle ear resonance frequency in the diagnosis of tympanic effusion, and to observe whether the combination of the two can improve the diagnostic efficacy. Methods: A prospective study comparing the secretory otitis media group with the control group was conducted. The results of otoscopy, pure tone audiometry and the GSI-33 middle ear analyzer were used as the standard. The control group’s 90% confidence interval (5 % ~ 95%) as the normal range, the classification of the secretory otitis media resonance frequency of normal or abnormal classification, and its tympanogram for the B, C type or heterotopia tympanic membrane aspiration, in order to draw the liquid was Positive. Results: The resonance frequency of the middle ear was normal between 900 and 1100 Hz, and the resonance frequency of the secretory otitis media group was significantly lower than that of the control group (P <0.01). The positive rate of drawing type B was 83%, which was significantly higher than that of type C and type of curve (P <0.05). Resonance frequency was normal, the pumping positive rate of 0. The positive rate of tympanic effusion in patients with ≤500Hz was significantly higher than that of> 500Hz (P <0.01). Conclusion: It is of great clinical significance to determine whether the tympanoid fluid accumulates by testing the middle ear resonance frequency, especially for tympanogram C type or heterotypic.