Many scholar have different opinions about clinical relationship between negative pressure tympanogram and middle ear effusion.

目前,国内学者对负图与积液的临床联仍存有分歧。

All tympanograms of 28 ears showed "A" type and bilateral abolition stapedius muscle reflex.

28耳图呈“A”、及对镫骨肌反射消失。

The tympanograms in 100 ears were “type B”,in which there was presence of middle ear effusions in 94 ears by auripuncture in the middle ears.

导抗图B100耳中，经穿剌证明有积液者94耳。