Our clinical wideband acoustic immittance (WAI) systems use middle-ear power analysis (MEPA) to provide a non-invasive method for characterizing middle-ear transduction with acoustic power assessment. Mimosa Acoustics is the first to bring this new technology into the hands of clinicians on our HearID and OtoStat systems.
Within seconds, measurements characterizing the middle ear over a wide frequency range are obtained, without changing the pressure in the ear. Pairing otoacoustic emission measurements with MEPA measurements provides diagnostic information about both the middle and inner ear.
For use with newborns, infants, children and adults.
The goal of any UNHS (Universal Newborn Hearing Screening) program is to correctly identify ears with hearing loss and correctly identify ears with normal hearing. In the newborn population, the incidence of conductive hearing loss is greater than sensorineural hearing loss. Usually, the conductive component is transient. Information on middle ear status improves the ability to correctly predict hearing status.
Tympanometry is not reliable in very young infants. It is possible to obtain abnormal 220 Hz tympanograms in infants less than 4 months when their middle-ear system is normal. Furthermore, normal results are possible in infants below 4 months of age even when middle ear effusion is present. The problem with tympanometry is that static pressurization of the ear canal produces large changes in the ear canal volume due to changes in the ear canal diameter. Until MEPA3, there was not a clinically accepted acoustic test of middle-ear status applicable to the neonatal population.
With our patented calibration techniques, MEPA can measure wideband power reflectance to 6 kHz, without the need for a pressurized ear canal. Power reflectance is a measure of middle-ear inefficiency. It is the ratio or percentage of power reflected from the eardrum to the incident power, as a function of frequency. Acoustic power measurements objectively quantify middle-ear function and malfunction.
See our Clinician's Guide on how to interpret MEPA results for all age groups, based on the latest peer-reviewed research.
To run MEPA3 on HearID, you need a HearID software and hardware system, with the MEPA3 Measurement Module and the Mimosa Acoustics calibration cavity set.
To run MEPA on OtoStat, you need a OtoStat software and hardware system and the Mimosa Acoustics calibration cavity set.