The Application and Characteristic of Auditory Brainstem Response in Children with Otitis Media with Effusion / 听力学及言语疾病杂志

ABSTRACT

Objective To explore the characteristics of auditory brainstem response(ABR) in children with otitis media with effusion(OME) before and after myringotomy with grommet insertion and the significance of ABR in diagnosing OME.Methods ABR were recorded in 50 cases(100 ears) before receiving myringotomy with grommet insertion for OME,30 cases(60 ears) underwent ABR monitoring after surgery again.For comparison,50 age-matched healthy children(100 ears) were also tested with ABR.Furthermore,30 cases were divided into two groups according to the viscidity of tympanic cavity secretion and the response threshold of wave Ⅴ were compared between the two groups.Results The response threshold of wave Ⅴand the peak latency of wave Ⅰwere normal in 13 percent of 50 cases(100 ears) before surgery.The rate of missed diagnosis was 13%.Among 50 cases,41% had normal response threshold for wave Ⅴ,52% had slight abnormal responses of thresholds of wave Ⅴ and 7% had medium response threshold of wave Ⅴ.The peak latency of wavs Ⅰwas normal in 19% OME children,but it prolonged in 72% OME children and absent in 9% OME children.The prolonged peak latencies(waves Ⅰ,Ⅲ andⅤ) and eleveted response thresholds of wave Ⅴ and shorted transmission time between waves(Ⅰ-Ⅲ andⅠ-Ⅴ) significant when compared to the control group.After surgery,the response thresholds of wave Ⅴand the peak latency of wave Ⅰwere normal in 46.7% children,the response threshold of wave Ⅴ were normal in 70.5% and slight abnormal in 29.5%.Occuring(elicit) rate of wave Ⅰwas 100% and peak latency of wave Ⅰwas normal in 50.2% chilren.The differrence of peak latencies(waves Ⅰ,Ⅲ andⅤ) and the response threshold of wave Ⅴ before surgery