[Magnetic resonance imaging study and cochlear implantation in post-meningitic deaf patients].
OBJECTIVE
To investigate the clinical application of magnetic resonance imaging (MRI) in post-meningitic patients and its impact on surgical decision.


METHODS
The pre-operative MRI data and auditory brainstem response (ABR) examination of five post-meningitic patients were studied. They were implanted with cochleas.


RESULTS
The interval between the onset of bacterial meningitis and the hearing loss was (15.8 +/- 15.0)d and it was longer in children than adults. Five ears showed membranous cochlear labyrinth abnormality; 3 ears had vestibule vestibule abnormality; 8 ears demonstrated semicircular canal abnormality on MRI examinations in totally 10 ears. The mean hearing threshold of 10 ears was (102.0 +/- 7.1)dB HL,that of the operated ears was (98.0 +/- 5.7)dB HL and that of the un-operated ears was (106.0 +/- 6.5)dB HL. It was (15.8 +/- 15.0)d from the bacterial meningitis onset to hearing loss. The interval is longer in children than adults. There were 3 ears that electrodes could not be inserted completely.


CONCLUSIONS
The bacterial meningitis may cause the abnormalities of inner ears and the MRI before surgery is essential for the pre-operative planning of cochlear implant.
Liu
Xiuli
X
Department of Otolaryngology, First Affiliated Hospital of Dalian Medical University, Dalian, 116011, China.
Yao
Yiwen
Y
He
Guili
G
Zhai
Lijie
L
D000328:Adult; D002675:Child, Preschool; D019929:Cochlear Implantation; D003638:Deafness / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D016057:Evoked Potentials, Auditory, Brain Stem; D006801:Humans; D007223:Infant; D007759:Labyrinth Diseases / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D016920:Meningitis, Bacterial / Q000150:complications*; D008875:Middle Aged