The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association · 2008
Hearing thresholds in newborns with a cleft palate assessed by auditory brain stem response.
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Viswanathan Narayanan, Vidler Michael, Richard Bruce
Аннотация
OBJECTIVE: To objectively estimate the extent of hearing loss in infants with cleft palate and to measure the incidence of hearing loss.
DESIGN: Retrospective consecutive case note review.
SETTING: Tertiary institutional regional referral center for cleft lip and palate.
PATIENTS, PARTICIPANTS: Consecutive cases of 90 infants with cleft palate who underwent auditory brain stem response (ABR) threshold estimation.
INTERVENTIONS: ABR threshold estimation during natural sleep in infants with cleft palate under 2 months of age.
MAIN OUTCOME MEASURES: Hearing level thresholds as estimated by auditory brain stem response and categorized as normal (< 25 < or = 35 dB nHL) , mild (> 35 < or = 45 dB nHL), moderate (> 45 < or = 65 dB nHL), severe (> 65 < or = 90 dB nHL), and profound (> 90 dB nHL) hearing loss.
RESULTS: Hearing loss was present in 82% of the infants tested. Most of the hearing loss was conductive (89%), mild (86%), and bilateral (84%). Average age of ABR threshold estimation was 48.5 days. In 22% of infants there was an associated syndrome. The mean air conduction thresholds for the right and left ear were 40 and 39.7, respectively.
CONCLUSION: The incidence of hearing loss in a cohort of cleft palate infants has been objectively estimated by auditory brain stem response thresholds and was found to be very high (82%).
DESIGN: Retrospective consecutive case note review.
SETTING: Tertiary institutional regional referral center for cleft lip and palate.
PATIENTS, PARTICIPANTS: Consecutive cases of 90 infants with cleft palate who underwent auditory brain stem response (ABR) threshold estimation.
INTERVENTIONS: ABR threshold estimation during natural sleep in infants with cleft palate under 2 months of age.
MAIN OUTCOME MEASURES: Hearing level thresholds as estimated by auditory brain stem response and categorized as normal (< 25 < or = 35 dB nHL) , mild (> 35 < or = 45 dB nHL), moderate (> 45 < or = 65 dB nHL), severe (> 65 < or = 90 dB nHL), and profound (> 90 dB nHL) hearing loss.
RESULTS: Hearing loss was present in 82% of the infants tested. Most of the hearing loss was conductive (89%), mild (86%), and bilateral (84%). Average age of ABR threshold estimation was 48.5 days. In 22% of infants there was an associated syndrome. The mean air conduction thresholds for the right and left ear were 40 and 39.7, respectively.
CONCLUSION: The incidence of hearing loss in a cohort of cleft palate infants has been objectively estimated by auditory brain stem response thresholds and was found to be very high (82%).