The Eustachian tube was expedite in about 1/2 of cases with chronic suppurative otitis media,mild obstruction in about 1/4 quarter of cases,and serious obstruction and entire obstruction in about 1/10 of cases respectively.

• 慢性化脓性中耳炎约1/2患者的咽鼓管是通畅的,轻度阻塞约占1/4,严重阻塞和完全阻塞各约占1/10。