| Title | ABR recordings in newborns using an ear canal electrode. | | Author(s) | Gaddam A, Ferraro JA | | Institution | Audiology Department, Children's Hospital and Regional Medical Center, Seattle, USA. | | Source | Int J Audiol 2008 Aug; 47(8):499-504. | | Abstract | The objective of this study was to improve the sensitivity of ABR recordings in newborns via a procedure that utilizes the ear canal as a recording site. Conventional recordings were compared to ear canal recordings of the ABR in 45 normally-hearing newborns who passed their newborn hearing screening. Responses were obtained at stimulus levels of 80, 60, 40, and 20 dBnHL using forehead (+) to ear canal (-), versus forehead (+) to mastoid (-) electrode configurations. ABR parameters evaluated included measurement of component amplitudes of wave I and V, absolute latencies of I and V, the I-V interwave interval, and amplitude ratio. At stimulus levels of 80, 60, and 40 dBnHL, wave I amplitude was significantly larger using the ear canal configuration. This investigation shows that the amplitude of wave I is significantly larger and easier to identify when the ear canal is used as one of the recording sites in comparison to more conventional scalp (mastoid) recordings. | | Language | eng | | Pub Type(s) | Journal Article
| | PubMed ID | 18698524 |
|
