Test Sequence; Ear Seal Check; Reflex Levels; Reflex Frequencies - Welch Allyn MICROTYMP 4 User Manual

Welch Allyn MicroTymp® 4 Tympanometer User Manual
T
EST SEQUENCE
Use the ▲ and ▼ keys to choose the order to be used for a both-ear test. Select either L, R (left
then right) or R, L (right then left). Press the ► key to confirm the selection or the ◄ key to
cancel.
E
AR SEAL CHECK
Use the ▲ and ▼ keys to choose the type of ear seal check employed at the start of a test. The
default STANDARD option is adequate for most circumstances, and this checks that an adequate
pressure can be created in the ear canal before starting the test.
However, if difficulty is experienced in using the eartips to create a seal the alternative EXTENDED
option may be helpful. This checks that a range of pressures will be available before starting a
test by means of a visual indication of the quality of the seal. Press the ► key to confirm the
selection or the ◄ key to cancel.
R
EFLEX LEVELS
Use the ▲ and ▼ keys to choose the maximum level of reflex stimulus to apply and the step size
between the levels of the preceding stimuli. The maximum level of stimulus may be set between
85dBHL & 100dBHL with a step size of 5dB (plus the option for 10dB step size at 100dBHL). Press
the ► key to confirm the selection or the ◄ key to cancel.
R
EFLEX FREQUENCIES
Use the ▼ key to scroll through the frequencies available for the ipsilateral reflex stimulus
(500Hz, 1000Hz, 2000Hz & 4000Hz), and then the ▲ key to select or deselect the frequencies at
which this stimulus is to be applied. Press the ► key to confirm the selection.
R
EFLEX SELECTION
Use the ▲ and ▼ keys to choose the circumstances when a reflex measurement is to be made
(always, never, only if an admittance peak is found, or only after confirmation is made at the start
of the test sequence). In cases where an admittance peak has not been established a pressure
of 0daPa is used. Press the ► key to confirm the selection or the ◄ key to cancel.
R
EFLEX THRESHOLD
Use the keys to choose the change in admittance that determines that a reflex has been detected
(0.01ml to 0.5ml). Use the ▲ and ▼ keys to change the values and press the ► key to confirm
and save the selection or the ◄ key to cancel.
R -
EFLEX AUTO STOP
By default, the reflex test at each frequency will stop at the lowest level of stimulus that produces
a response. By setting REFLEX AUTO-STOP to NO the MicroTymp 4 will test for a reflex at all
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