[An optimal electrode position for recording auditory evoked brain stem potentials within the scope of pediatric audiology]. / Eine optimale Elektrodenposition für die Ableitung auditorisch evozierter Hirnstammpotentiale im Rahmen der Pädaudiologie.
Laryngorhinootologie
; 77(3): 131-5, 1998 Mar.
Article
em De
| MEDLINE
| ID: mdl-9577818
ABSTRACT
BACKGROUND:
Estimation of hearing threshold in children is based on reliable identification of a response to a stimulus in the near-threshold range. It is well known that only wave V can be detected in brainstem potentials evoked by near-threshold stimuli. So the question arises as to whether or not a noncephalic reference electrode compared to the common lateral postition of the reference electrode on the ipsilateral mastoid produces a more stable wave V of increased amplitude.METHOD:
Thirty-three normal hearing children in three age groups (< 6 years, 6-10 years, > 10 years) were investigated. For a near-threshold stimulation with 100-microsecond-clicks (10, 20, 30 dB nHL), bioactivity was simultaneously recorded with the reference electrode in four different locations (ipsilateral mastoid, contralateral mastoid, ipsilateral earlobe, and noncephalic electrode).RESULTS:
The noncephalic reference produced the highest absolute and scaled amplitudes. This finding was statistically significant. For all investigated intensities, recording with the noncephalic reference electrode yielded the highest number of reliable detectable potentials. Evaluation of the residual noise in the four recording locations revealed a significantly increased noise level for the noncephalic electrode at the nape of the neck.CONCLUSIONS:
Even if the residual noise is increased, the use of noncephalic reference results in a more reliable detection of wave V compared to the conventional locations of the reference electrode.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Audiometria de Resposta Evocada
/
Tronco Encefálico
/
Potenciais Evocados Auditivos do Tronco Encefálico
Tipo de estudo:
Prognostic_studies
Limite:
Adult
/
Child
/
Child, preschool
/
Female
/
Humans
/
Male
Idioma:
De
Revista:
Laryngorhinootologie
Assunto da revista:
OTORRINOLARINGOLOGIA
Ano de publicação:
1998
Tipo de documento:
Article