Auditory steady state response in pediatric audiology.
ABSTRACT The main issue regarding pediatric audiology diagnosis is determining procedures to configure reliable results which can be used to predict frequency-specific hearing thresholds.
To investigate the correlation between auditory steady-state response (ASSR) with other tests in children with sensorineural hearing loss.
Prospective cross-sectional contemporary cohort study. Twenty-three children (ages 1 to 7; mean, 3 years old) were submitted to ASSR, behavioral audiometry, click audiometry brain stem response (ABR), tone burst ABR, and predicting hearing level from the acoustic reflex.
the correlation between behavioral thresholds and ASSR was (0.70- 0.93), for the ABR tone burst it was (0.73 -0.93), for the ABR click it was (0.83-0.89) only at 2k and 4 kHz. The match between the ASSR and the hearing threshold prediction rule was considered moderate.
there was a significant correlation between the ASSR and audiometry, as well as between ABR click (2k and 4 kHz) and for the ABR tone burst. The acoustic reflex can be used to add information to diagnosis in children.
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ABSTRACT: Increased serum bilirubin levels during infancy increase the risk of hearing loss in infants. This study aimed to investigate the relationship between pure-tone audiometry hearing thresholds and thresholds estimated using auditory steady-state responses (ASSRs) in children with a history of neonatal hyperbilirubinemia, and to evaluate the usefulness of 90-Hz ASSR in estimating hearing thresholds in children. This study was conducted on 26 children (13 girls and 13 boys) who were aged 2.4-11 years and had a history of neonatal hyperbilirubinemia (bilirubin level >17 mg/dL). ASSR thresholds were compared with behavioral thresholds and were interpreted after considering the amount and type of hearing loss. Of the 26 children, 12 had normal hearing thresholds, and 14 had varying degrees of sensorineural hearing loss. In general, a high correlation (r ≥ 0.81, p < 0.01) was found between the ASSR and behavioral thresholds. The highest correlation was observed at 2,000 Hz (r = 0.88, p < 0.01). No significant difference was observed (p > 0.13) between mean behavioral and ASSR thresholds at 52 studied ears. The results of this study showed that 90-Hz ASSR assessments provide reliable estimates of behavioral hearing thresholds in children who have a history of neonatal hyperbilirubinemia and sensorineural hearing loss or normal hearing.Archives of Oto-Rhino-Laryngology 10/2013; 271(9). DOI:10.1007/s00405-013-2731-6 · 1.61 Impact Factor
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ABSTRACT: Objective: To demonstrate the feasibility and reliability of simultaneous binaural recording of auditory steady-state responses (ASSR) in young children using narrow-band CE-Chirps as stimuli. Design: Prospective cohort study comparing ASSR thresholds to four frequency stimuli (0.5, 1, 2, and 4 kHz), with click-evoked auditory brainstem responses (ABR) and behavioral response audiometry. Study sample: Thirty-two young children (mean age 7.4 ± 5.2 months) referred for auditory assessment were evaluated. Results: The mean duration for ABR recordings was 13.3 ± 7.2 min versus 22.9 ± 15.8 min for ASSR (p < 0.01). ASSR (means of 2 and 4 kHz thresholds) were highly correlated with ABR thresholds (R(2) = 0.935, p < 0.001), though significantly different (3 ± 10.7 dB, p = 0.02). ASSR (means of 0.5, 1, 2, and 4 kHz thresholds) were highly correlated with mean behavioral response audiometry thresholds (R(2) = 0.968, p < 0.001). ASSRs were highly and significantly correlated with behavioral response audiometry at 0.5, 1, 2, and 4 kHz (R(2) = 0.845, 0.907, 0.929, and 0.859 respectively, p < 0.001). 87.5% and 90.7% ASSR thresholds were within a ± 10 dB range around their corresponding ABR and mean behavioral response audiometry thresholds. Conclusions: Narrow-band CE-Chirps allow a fast and reliable assessment of auditory thresholds in children, especially in the low-frequency range, by comparison with other stimuli.International Journal of Audiology 07/2014; 54(2):1-8. DOI:10.3109/14992027.2014.935496 · 1.43 Impact Factor
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ABSTRACT: The Auditory steady state response (ASSR) provides a frequency-specific and automatic assessment of hearing sensitivity and is used in infants and difficult-to-test adults. The aim of this study was to compare the ASSR thresholds among various types (normal, conductive, and sensorineural), degree (normal, mild, and moderate), and configuration (flat and sloping) of hearing sensitivity, and measuring the cutoff point between normal condition and hearing loss for different frequencies. This clinical trial was performed in Iran and included patients who were referred from Ear, Nose, and Throat Department. A total of 54 adults (27 with sensorineural hearing loss, 17 with conductive hearing losses, and 10 with normal hearing) were randomly chosen to participate in our study. The type and degree of hearing loss were determined through testing by otoscopy, tympanometry, acoustic reflex, and pure tone audiometry. Then the ASSR was tested at carrier frequencies of 500, 1000, 2000, and 4000 Hz. The ASSR accurately estimates the behavioral thresholds as well as flat and sloping configurations. There was no correlation between types of hearing loss and difference of behavioral and ASSR thresholds (P = 0.69). The difference between ASSR and behavioral thresholds decreased as severity of hearing loss increased. The 40, 35, 30, and 35 dB could be considered as cutoffs between normal hearing and hearing loss for 500, 1000, 2000, and 4000 Hz, respectively. The ASSR can accurately predict the degree and configuration of hearing loss and discriminate the normal hearing from mild or moderate hearing loss and mild from moderate hearing loss, except for 500 Hz. The Air-conducted ASSR could not define the type of hearing loss.