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1. Press the FVC button in the VC or IVC screens to enter the Single
Breath Test screen. To perform a Single Breath Test:
a. Wait for the Exhale to Begin icon to appear.
This indicates that the COMPACT unit is ready to accept a blow.
b. Read the following instructions to the subject so that testing is
performed properly:
i.
Stand up.
ii.
Keep the flowhead away from your mouth.
iii.
Inhale as deeply as possible and inset the mouthpiece
into your mouth, clamping it between your teeth.
iv.
Close your lips around the mouthpiece.
v.
Exhale as much and as quickly as possible and try to
keep exhaling for at least 6 seconds.
vi.
If inspiratory indices are selected, then inhale as
quickly as possible.
2. If you are prompted to accept the test, press the Cancel button to
reject the test or the Enter key to accept the test.
The FVC and FEV1 values recorded for the blow are tabulated.
The best FVC and FEV1 values for the current session and the
Lower Limit of Normality (LLN) are also displayed.
3. Repeat to perform another Single Breath Test if required.
Note: A maximum of 12 Single Breath tests can be performed in one
session.
Using the Incentive Device
The Incentive Device is used as an aid in the Single Breath Test of
children. To access this:
1. Press the Incentive button on the top of the screen.
Note: You must wait for the Exhale to Begin icon to
appear before a blow can be performed.
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