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Hearing Screening and Diagnostic Evaluation of Children With Unilateral and Mild Bilateral Hearing Loss

Centers for Disease Control and Prevention, Atlanta, Georgia, dross3{at}cdc.gov

W. June Holstrum, PhD

McKing Consulting Corporation

Marcus Gaffney, MPH

Centers for Disease Control and Prevention, Atlanta, Georgia

Denise Green, MPH

Centers for Disease Control and Prevention, Atlanta, Georgia

Robert F. Oyler, PhD

Mississippi University for Women, Columbus

Judith S. Gravel, PhD

Children's Hospital of Philadelphia, Pennsylvania

More than 90% of newborns in the United States are now being screened for hearing loss. A large fraction of cases of unilateral hearing loss and mild bilateral hearing loss are not currently identified through newborn hearing screening. This is of concern because a preponderance of research has demonstrated that unilateral hearing loss and mild bilateral hearing loss can lead to developmental delays and educational problems for some children. To help address this probable underidentification of unilateral hearing loss and mild bilateral hearing loss among infants and children, the Centers for Disease Control and Prevention Early Hearing Detection and Intervention program and the Marion Downs Hearing Center convened a workshop in Breckenridge, Colorado, in July 2005. During this workshop, several issues related to screening and diagnosing unilateral hearing loss and mild bilateral hearing loss were identified, as well as recommendations for future research in this area. Issues identified included the lack of standardized definitions for permanent unilateral hearing loss and mild bilateral hearing loss; the use of screening protocols that are primarily designed to identify bilateral and unilateral hearing losses of a moderate degree or greater (eg, above 40 dB); calibration of screening equipment; availability of facilities that can provide the full range of audiologic, diagnostic, and management services to this pediatric population; and an overall lack of awareness by many professionals and families about the potential effect of unilateral hearing loss and mild bilateral hearing loss. Suggestions for future research, such as identifying ways to improve the identification of cases of unilateral hearing loss and mild bilateral hearing loss, were also discussed.

Key Words: mild bilateral hearing loss (MBHL) • unilateral hearing loss (UHL) • minimal hearing loss • newborn hearing screening • early hearing detection and intervention

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