ABSTRACT
OBJECTIVE To investigate the characteristics and laws of changes in electrically evoked auditory brainstem responses(EABR),electrically evoked stapedius reflex(ESRT) after cochlear implantation in children with inner ear malformation.METHODS 88 cases of Australian 24 multi-channel cochlear implants were divided into normal group and inner ear malformation group,The EABR and ESRT thresholds were measured at different periods within one year after operation.Behavior auditory responses,T-level and C-level were measured 1 year postoperatively to analyze their characteristics and changes.RESULTS The EABR and ESRT thresholds in the patients with inner ear malformation were significantly higher than those in the normal cochlear group(P＜0.05).The changing trend of EABR and ESRT were the same in the 2 groups,the overall trend is that low frequency value is low,high frequency value is higher.EABR,ESRT threshold increased gradually after 1 year,EABR was significantly correlated with T-level,and ESRT was significantly correlated with C-level.CONCLUSION The changes of EABR and ESRT thresholds in the cochlear implantation of the inner ear malformation group were similar to those of the normal cochlear group,the thresholds can be used to guide mapping for the inner ear malformation of the cochlear implant.
ABSTRACT
OBJECTIVE@#To investigate the changes and determine the difference of electrode impedance and neural response telemetry ( NRT) value with cochlear implants in children with malformed inner ear and normal inner ear.@*METHOD@#Eighty-eight children with multi-channel cochlear implants participated in this study. Children were divided into malformed inner ear group and normal inner ear group. To test the electrode impedance values and NRT value.@*RESULT@#The changes of electrode impedance showed the similar changing pattern in two groups. There was not different in electrode impedance values between the two groups (P > 0.05). The changes of electrode neural response telemetry values showed the similar changing pattern in two groups. There was significantly different in electrode impedance values between the two groups (P < 0.05). The NRT were going up higher from electrode 22 to electrode 1.@*CONCLUSION@#The values vary are different programming sessions and electrodes during the first 3 months of cochlear implant use. To acquire better hearing frequent programming sessions are necessary.
Subject(s)
Adolescent , Child , Child, Preschool , Female , Humans , Infant , Male , Case-Control Studies , Cochlear Implantation , Cochlear Implants , Cochlear Nerve , Ear, Inner , Congenital Abnormalities , General Surgery , Electric Impedance , ElectrodesABSTRACT
Objective To explore the methods for endoscopy nasal microsurgery and multiple techniques in treatment of nasopharyngeal angiofibromas. Methods CT, MRI and digial substraction angiography (DSA) and endoscopic examination had been used. ALL 12 patients accepted preoperative feeding artery embolum, hypotention anesthesia and injected adrenaline-lidocaine. Microelectrotomy-electrocoagulation had been used to remove tumor. Results All patients were treated by endoscopic nasal surgery. No complications had occurred. No recurrence were found in follow-up period. Conclusion The important factors to reduce amount of introperative bleeding are to select proper operative patients and use multiple techniques. Endoscopy nasal surgery has dominance in reducing complications, wound, tumor recurrence, operative time and nasal function.