Universal screening for congenital hearing loss

Universal newborn hearing screening coming soon: "hear's" why

Screening the hearing of all newborns, both NICU and well nursery, is rapidly becoming the standard of care. The impetus for universal newborn hearing screening (UNHS) has come from outside the domain of nursing and the newborn nursery. Because nursing will be involved in nearly all aspects of UNHS, nurses need a thorough knowledge base about permanent childhood hearing loss (PCHL) and UNHS. Technology exisits today that can objectively and physiologically screen for this condition at a cost comparable to metabolic screening. PCHL occurs more than twice as often as all the hemoglobinopathies and inborn errors of metabolism combined. Undiagnosed hearing loss often leads to permanent developmental delays. The ultimate goal of early diagnosis and intervention for a congenital hearing loss is to enable the child to develop language and communication skills that correspond to his chronological age and innate cognitive abilities.

Minimizing false-positives in universal newborn hearing screening: a simple solution

BACKGROUND AND OBJECTIVES

The false-positive rates of previously reported universal newborn hearing screening (UNHS) programs range between 2.5% and 8%. Critics of UNHS programs have claimed that this rate is too high and might lead to a number of the negative effects produced by false-positive screening tests, namely emotional trauma, disease labeling, iatrogenesis from unnecessary testing, and increased expense in terms of time and money. We previously reported, based on some preliminary data, that as many as 80% of newborns who failed the initial hearing screen subsequently passed when they were retested the following day, before being discharged from the hospital. We now present the results of this intervention for our entire UNHS program during a 7-month period.

METHODS

We analyzed data from 3142 non-neonatal intensive care unit infants screened with an automated auditory brainstem response at the Women's Hospital of Greensboro from November 1, 1999 to May 31, 2000. A protocol was developed wherein all infants who failed the initial UNHS were rescreened with another automated auditory brainstem response before hospital discharge. Data collected included pass/fail rates during the inpatient stay as well as follow-up data and risk factors for congenital hearing loss.

RESULTS

Confirmed hearing loss occurred in 8 nonneonatal intensive care unit infants, a rate of 2.5/1000. Eighty percent of newborns who failed the initial hearing screen passed on rescreening before hospital discharge. This produced a false-positive rate of 0.8% and a corresponding positive predictive value of 24%. If inhospital rescreening had not occurred, our false-positive rate and positive predictive value would have been 3.9% and 6.1%, respectively.

CONCLUSIONS

Our simple intervention of rescreening all infants who failed their initial UNHS before hospital discharge reduced the false-positive rate of UNHS to 0.8%. We suggest that this simple, inexpensive intervention should be instituted for all similar UNHS programs.