Conductive hearing loss u Diagnosis u Tuning fork RI: negative WT: lesion side ST: prolongation ter fann 阳a33C1B0 PTA Bone threshold: normal o Air threshold 25-60 dB Image stud 00000n0一 0p00000009 100 110 10Conductive hearing loss ◼ Diagnosis ◼ Tuning fork ◼ RT: negative ◼ WT: lesion side ◼ ST: prolongation ◼ PTA ◼ Bone threshold: normal ◼ Air threshold: 25-60 dB ◼ Image study