Moldex BITREX Test Instructions

A. EQUIPMENT REQUIRED

1. Hood
2. Nebulizer #1 (BITREX ® Sensitivity Solution)
3. Nebulizer #2 (BITREX ® Fit Test Solution)
4. Two sets Replacement Nebulizer Inserts
5. BITREX Fit Test Solution Applicator Tube (#0504)
6. BITREX Sensitivity Solution Applicator Tube (#0503)
7. Appropriate Moldex Respirators*
®
*Use with any Moldex N, R or P class disposable respirator. This
fit test kit may also be used with any Moldex half mask respirator
by using any N, R or P class filter.
B. NEBULIZER PRE-INSPECTION AND
PREPARATION
1. Remove the top half of the nebulizer by unthreading it from the
bottom half. (Repeat for each nebulizer)
2. Using your index finger lightly push
down on the Atomizer to ensure that it
is pushed down all the way onto the
bottom half of the nebulizer.
*See Figure 1 (Repeat for each
nebulizer).
3. Inspect and ensure that the black O-ring
is properly seated. (Repeat for each
nebulizer)
4. Replace the top half of nebulizer and remove plug from
nebulizer exhaust port. (Repeat for each nebulizer)
5. Use rubber or other protective gloves prior to next step.
6. Get one Sensitivity Solution applicator
tube from box of (6) part #0503 and
hold upright and squeeze several times
until glass ampoule is crushed. Insert
applicator tip into the Exhaust Port of
the nebulizer labeled "Sensitivity
Solution" and squeeze the applicator
until drained. Use the foam cushion
insert in the Fit Test kit to hold the
nebulizer(s) upright. See Figure 2
7. Get one Fit Test Solution applicator tube from box of (6) part
#0504 and hold upright and squeeze several times until glass
ampoule is crushed. Insert applicator tip into the Exhaust Port of
the nebulizer labeled "Test Solution" and squeeze the
applicator until drained.
8. Ensure that each nebulizer is able to produce solution mist via
the exhaust port by removing plug from Breather Vent and
squeeze bulb 4 – 5 times. If solution mist is not visible or seems
very weak, carefully (so not to spill the solution) remove the top
half of the nebulizer by unthreading it from the bottom half and
repeat #2 above. (Repeat for each nebulizer)

C. TASTE SENSITIVITY SCREENING

Purpose: This test is done to ensure that the person being fit tested
can detect the taste of BITREX at sufficiently low levels to make the fit
test valid.
1. Ensure that the test subject does not eat, drink, smoke or chew
gum for 15 minutes before the test.
2. Explain the screening and fit testing procedures to the subject.
3. Instruct subject to put on the hood without a respirator.
4. Position the hood forward so there is about six inches between
the subject's face and the window. This is especially important
for the fit test. It allows free movement of the head when the
subject is wearing a respirator and helps ensure even dispersion
of the aerosol around the face seal area.
5. Instruct the test subject to breathe with their mouth slightly open
and tongue extended.
6. Using the nebulizer labeled BITREX Sensitivity Solution, inject the
aerosol into the hood through the hole in front of the enclosure.
Inject ten (10) squeezes of the bulb, fully collapsing and fully
expanding the bulb on each squeeze.
7. Ask the subject if he can detect the bitter taste of BITREX.
8. If the subject does not detect bitter taste, inject an additional ten
squeezes into the hood.
9. If the subject still does not detect bitter taste, inject an additional
ten squeezes, for a total of 30 squeezes.
10. If 30 squeezes were inadequate to elicit a response from the
Figure 1
subject, this subject cannot be fit tested with the BITREX test.
Another fit test method must be used.
11. If the subject could detect bitter taste, the number of squeezes
required to produce a taste response should be noted, i.e.,
10, 20 or 30 squeezes, even if subject tasted the BITREX on a
number of squeezes other than multiples of ten.
12. Remove the hood. Wait a few minutes, to give the subject time
to clear the taste from his mouth, before proceeding to the fit
test. A drink of water during this time will aid in removing the
bitter taste. Use a paper towel to wipe the subject's mouth of
any residue (also wipe mustaches).
Figure 2
Ideas that wear well. ®