Otodynamics Otoport Flex - Page 130

CHAPTER FIFTEEN
Conguration
130
Conguration
Association (ASHA) - Expert Panel Recommendations on Newborn
Hearing Screening (2014). Some major infant screening programs use
40dBHL (e.g. in UK). Screening with stimulus levels above 40dBnHL will
miss some mild hearing losses.
In ‘ABRcustom’ mode the stimulus level can be set from 5-60dBHL in
1dB steps. The default setting is OFF (i.e. ABR custom mode test is
unavailable).
• The ABRcustom mode is not intended for diagnostic use or ABR
threshold determination.
• Stimulus levels higher than 45dBnHL can be useful in training sessions
and in instrument function conrmation testing to allow more rapid
acquisition of ABR in noisy environments. These levels should not be
used for infant screening as they will miss mild to moderate losses.
• Fine adjustments of the stimulus level (1dB steps) are intended for the
setting of precise (custom) stimulus levels e.g. for compatibility with prior
screening practice.
• Low stimulus levels (down to 5dBnHL) can be used for the audiological
conrmation (subjective testing) of the instrument’s hearing level setting
calibration.
In Ear Cups mode the stimulus level limits are 40 dBHL when the stimulus
type is chirp and 30 dBHL when the stimulus type is click.
Notes:
The Otoport OAE+ABR dynamically adjusts the delivered
sound pressure level to achieve the selected normal hearing
level (nHL) for each test. The instrument will achieve the
selected dBnHL in all sizes of ear including, for screening
levels (30-45dBnHL), adult ears up to the volume of a neonate
screening ear cup.
The Otoport OAE+ABR is capable of recording ABR responses
from patients of all ages provided a non-template (Fsp only)
pass criteria is selected (PC1 or PC4). However the specicity
of the device has only been established for neonates and
therefore it is not intended for use as screen for hearing loss in
older children or adults.