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 Wysłany: Nie 11:59, 13 Mar 2011 Temat postu: Evoked potentials recorded in the computer dry dea |
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Evoked potentials recorded in the computer dry deaf children with cochlear implantation of
Language Diseases 2002, Vol 10 No. 2 75 processors. Hearing to be compensated as soon as possible. l Materials and Methods Two cases of deaf children, for example, 1 to 2 year-old boy, for example 2 to 3-year-old girl and a half. Preoperative audiological assessment: short sound (cllck) Bilateral brainstem evoked potential response to 130dBpeSPL no reaction; behavioral response audiometry in 25o, lOo0,[link widoczny dla zalogowanych], 2000, and 4000Hz, ears I10dB} no response; acoustic impedance test is A Second, the preoperative hearing aid in children 3 to 6 months is invalid. Determination of the normal children's mental intelligence. CT examination revealed double the normal cochlear development. MPd examination revealed normal cochlea and auditory nerve in the form of kit. Second, children with cochlear implants France DIGISON, intraoperative study using MxMD】 G M cochlear stimulator and external part of the connection, the computer adjust the stimulation current intensity, the implanted electrodes to stimulate the spiral ganglion, dedicated by the French Pc computer machine recorded evoked potential waveform dry. Month after implantation with generous MPDxl0v1.72 speech processor software debugger, set the threshold. Implant speech processor debugging steps are: first, according to objective data on the computer dry evoked potentials, speech processing DIcIsoNIC set different threshold values. The second step, according to behavioral auditory responses in children: fear of the sound, listening to the sound Liu, adaptation and behavioral audiometry in the sound, the best fine-tune the threshold (TL) and comfort threshold (CL). Behavioral audiometry after the quasi-free field, the sound is narrow-band noise stimulus. 2 results of two children with cochlear implanted patients in the record to the electrodes in the brain stem evoked potentials with the values in Table l. L3 and 7 of the electrode to the brain stem potentials recorded waveform can be clearly distinguished from III and v waves, indicating that children with Xin stretch and brainstem auditory function by the normal behavior of the measured one month after Xin Min to normal. Table 2 lists, according to the electrode auditory brainstem response threshold, set the width of the value of different speech processor and the corresponding behavioral responses and behavioral audiometry threshold. Found that the threshold set, the amplitude should be less than 15 to 20 of the computer dry evoked potential amplitude. L5 time in the electrode set threshold stimulation and the duration of electrically evoked (pulsewidths) the same number of each reduced by one electrode to increase the threshold 2-3dB,[link widoczny dla zalogowanych], and set the comfort threshold difference between Fujian and 3-5dB, which children can be best behavioral response threshold and behavioral audiometry, the hearing threshold at each frequency behavior and speech processor, the average threshold difference of 10 ~ 15dB (Table 3). Table l surgery recorded evoked potential of the electrode dry boring computer table 22 fell ill set the value of different speech processor news value 【dB) and the corresponding behavioral responses and behavioral hearing heard stripping values in Table 3 measured using narrow-band noise stimulus back 2 the value of the frequency behavior of heard language processor Kan Yu discussed the value of {dBm3 after cochlear implantation in young deaf children how to determine the effect of implantation and postoperative accurate and objective commissioning speech processor,[link widoczny dla zalogowanych], is still difficult. Computer Dry evoked potential preoperative, intraoperative and postoperative. Perhaps solve this problem. In this paper, the data confirm that intraoperative record on the computer dry analysis of evoked potential waveform can be predicted in children after cochlear implantation effects, post-operative behavior of the measured threshold and Xin predict the effect of surgery is essentially the same on the other hand, This data is speech processor debug exact threshold, to provide an objective basis. In this paper, the data suggest,[link widoczny dla zalogowanych], Digisonic speech processor,[link widoczny dla zalogowanych], set the threshold value, the amplitude should be less than 15 ~ 20 ) the same number of each reduced by one electrode to increase the leap value 2 ~ 3dB. and set the comfort threshold and the threshold difference between the 3 ~ 5dB. for the first time debugging, so that the behavior of a hearing threshold of children to normal. Therefore, intraoperative evoked potential in the computer dry applications not only can predict the electrophysiological function of auditory nerve, but also to determine the functional status of brain stem auditory center, you can suggest the effect of cochlear implant. In addition to postoperative speech processor provides fast and accurate objective basis for debugging. 4
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