1.5 Description
General
easyScreen features a touch-screen display and user-friendly user interface in a
compact hardware design. easyScreen can be purchased with various licenses
allowing you to perform different hearing screening tests.
ABR
easyScreen uses fast rate auditory brainstem response (ABR) technology to screen
patients for hearing loss. Using the default protocol, a modified click stimulus, the CE-
CHIRP
®
of 35 dB nHL
,
is delivered into the patient’s ear while electrodes placed on the
patient’s head measure EEG activity. Alternate protocols with different stimulus
intensity levels as well as a click stimulus are available. See section 6.6.
The EEG is processed and analyzed automatically using the easyScreen’s state-of-
the-art, powerful, response detection algorithm. When a response is detected, the
screening is stopped automatically and a Pass result is assigned to the ear tested.
When no response is detected after 3 minutes of EEG activity has been processed, a
Refer result is assigned.
BERAphone
®
The BERAphone
®
contains both a one-channel preamplifier for recording EEG from
re-usable electrodes placed on the patient’s skin as well as a transducer for delivery
of the acoustic stimulus. It eliminates the need for traditional disposable electrodes and
ear couplers.
The BERAphone
®
is a non-critical, patient care item since it comes into contact with
intact skin, but not mucous membranes. For such devices, guidelines from both the
US Center for Disease Control1
(CDC) and the Robert-Koch-Institut Bundesinstitut
für Infektionskrankheiten und nicht übertragbare Krankheiten (Berlin, Germany)
recommend cleaning and disinfection with a hospital-grade, surface disinfectant.
TEOAE
Transient Evoked Otoacoustic Emissions (TEOAE) technology uses a click stimulus to
screen patients for cochlear hearing loss. Responses to the stimulus are predictable
and, therefore can be measured via a sensitive microphone placed in the patient’s ear
canal. The response can be divided into frequency bands for assessment.
DPOAE
Distortion product otoacoustic emissions (DPOAE) technology uses pairs of pure tones
presented in sequence to screen patients for cochlear hearing loss. Responses to the
stimulus are predictable and therefore can be measured via a sensitive microphone
placed in the patient’s ear canal.
Rutala WA, Weber DJ, Healthcare Infection Control Practices Advisory Committee. Guideline for
Disinfection and Sterilization in Healthcare Facilities, 2008. CDC, Department of Health and Human
Services, USA
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