?URPOSE To compare the effect of beveled teflon ventilating tube (BTVT) and collar button silastic grommet (CBSG) in the treatment of chronic secretory otitis media (CSOM).

• 目的比较斜口teflon通气管与钮扣状硅橡胶管治疗慢性分泌性中耳炎的疗效。