[Experimental study on distortion product otoacoustic emission used for hearing monitoring in the oto-neurosurgery operation].

OBJECTIVE

To explore the feasibility of distortion product otoacoustic emission (DPOAE) used for hearing monitoring in the oto-neurosurgery operation.

METHOD: Twenty-four rabbits were equally divided into 3 groups: none operation (group A, n = 8); pressing the cerebella after the cerebellopontine angle was exposed (group B, n = 8); Blood flow of internal auditory artery were occlusion for 5 min after the facial-acoustic nerve complex was pressed(group C, n = 8). DPOAE value and histologic were observed.

RESULT: In the state of pressing the cerebellar and blood flow of inner hearing artery were occlusion, DPOAE amplitude values changed, part of the frequencies could not be induced, DPOAE amplitude values of induced frequencies descend and nael significant difference (P < 0.05) to preoperation, as well as correspond to histology changes.

CONCLUSION

DPOAE could monitor the hearing loss effectively and would be one of ideal monitoring methods in the oto-neurosurgery operation.