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目的探讨C型曲线在分泌性中耳炎鼓室穿刺治疗中的指导意义。方法对115例(145耳)感冒后出现耳闭塞感患者进行声导抗及纯音听阈测试检查。结果C型鼓室图145耳中,鼓室压≤-180daPa者87耳,鼓室穿刺抽液阳性86耳,占98.9%;鼓室压>-180daPa者58耳,抽液阳性15耳,占25.9%。2组抽液阳性率比较差异有统计学意义(P<0.01)。鼓室压≤-180daPa时,纯音听阈测试为传导性耳聋,骨气导间距为25～40dB。结论C型曲线鼓室压≤-180daPa,提示存在中耳积液,依据该值范围进行鼓室穿刺抽出积液的准确性较高。
Objective To explore the significance of C-curve in the treatment of tympanostomy for secretory otitis media. Methods A total of 115 cases (145 ears) of patients with ear occlusion were tested for acoustic impedance and pure tone hearing threshold. Results In the ear of Type C tympanum, there were 87 ears with tympanic pressure ≤-180daPa and 86 ears with positive tympanic puncture fluid, accounting for 98.9%. The tympanic cavity pressure was> 180daPa with 58 ears, and 15.4% were positive with pumping fluid. There was significant difference in the positive rate of two groups (P <0.01). Tympanometry pressure ≤-180daPa, pure tone hearing threshold test for conductive deafness, bone conduction distance of 25 ~ 40dB. Conclusions C-curve tympanic pressure ≤-180daPa, suggesting that the presence of middle ear effusion, according to the range of values for tympanic cavity puncture fluid extraction accuracy.