For patients with bilateral effusion for over 3 months and conductive hearing impairment of 20 dB HL or worse, surgical intervention should be considered.
For patients with bilateral effusion for over 3 months and conductive hearing impairment of 20 dB HL or worse, surgical intervention should be considered.
病程持续3个月以上且无改善的趋势，合并传导性听力损失时，则开始考虑外科治疗。