Does the GSI Corti automatically start testing when the probe seal is obtained?
Yes, after the probe is placed in the ear canal and the test is started, the OAE screener runs through a series of self-checks to ensure that a seal is obtained and the noise floor is low, and conducts an in-the-ear signal calibration test. This process happens very quickly and often takes less than a second. The test will then begin automatically.
What does a “Pass” or “Refer” indicate on the Corti?
The presence of otoacoustic emissions suggests normal outer hair cell function. However, a Pass result is not an indication that the full auditory system is normal. A full audiologic evaluation should be administered if concerns about hearing sensitivity persist. A Refer result may be caused by outer hair cell dysfunction, temporary conditions such as fluid in the middle ear or debris in the ear canal, or less than ideal test conditions. A Refer result should not be assumed to be an indicator of a lack of auditory function or the presence of pathology. Refer results should be repeated. If the Refer result persists, full audiologic diagnostic testing and/or medical evaluation should be conducted.
Can the Corti be used in an environment with background noise?
It is ideal to use the Corti in a quiet environment. For noisier environments, the Corti’s unique patented Adaptive Artifact Rejection Algorithm optimizes responses in variable noise. Every sample is categorized and sorted as the data is collected. This method allows data to be collected successfully in higher noise environments, reducing false referrals and the need for additional screening.
How does a DPOAE test differ from a TEOAE test?
Distortion Product Otoacoustic Emissions measure outer hair cell function of the cochlea using pairs of tones within a frequency range of up to 8 kHz. Transient-Evoked Otoacoustic Emissions measure the response using a click or broadband stimulus. The Corti accurately assesses Distortion Product and Transient Otoacoustic Emissions.
What is the battery life of the Corti?
The battery life is 20 hours of continuous power “on” time. The charge time for a fully depleted battery is four hours. For convenience, the optional cradle will charge the instrument whenever the unit is placed in it.