Liaqat Ali, Tayyaba Khawar Butt.
Auditory brainstem responses to bone conducted tones in children.
Pak Paed J Jan ;32(1):29-35.

Objectives:-To look into the role of bone conduction auditory brainstem responses in the hearing assessment of children. Design:-Prospective study from January 2007 to April 2007. Settings:-The department of Paediatric Audiology, the Children`s Hospital and the Institute of Child Health Lahore. Materials and Methods:-A total of 100 patients in the age range of 0 to 14 years were assessed for hearing. Air and bone conduction auditory brainstem responses were carried out while sedating the patients with chloral hydrate (if needed) with Amplaid EMG-14 and tympanometry, with GSI-38. Then, statistical analysis was conducted. Results:-Among 100 total patients, 54% were male and 46% female. Air conduction hearing thresholds using click stimulus, ranged from 70 to 130 dBpeSPL in right ear, from 45 to 130 dBpeSPL in left ear and bone conduction hearing levels from 20 to 80 dBpeSPL with a mean of 112 dBpeSPL, 107 dBpeSPL and 62 dBpeSPL respectively. Four percent children had normal hearing, 34% moderate, 12% severe and 50% profound degree hearing loss. Twenty seven percent patients had conductive hearing loss, 11% sensorineural, 58% mixed and 4% with normal hearing. Thirty two percent children had normal tympanograms, 62% flat and in 6%, tympanometry could not been conducted due to unilateral or / and bilateral microtia (5 patients) and artesia (6 patients). Conclusion:-Auditory brainstem response recordings to bone conducted tones appear to be feasible for cochlear sensitivity and can be used for hearing assessment in children.

PakMediNet -Pakistan's largest Database of Pakistani Medical Journals - http://www.pakmedinet.com