A Global Leader in Respiratory Diagnostics
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DT_0006 Issue 15
eight.
h. Check FEV1 and FVC repeatability and perform more manoeuvres
as necessary.
i. Click on
for quality information and test acceptability.
Note:
A single-breath FVC technique may also be performed on the
device.
Results grading for FEV1 and FVC is shown below in Table 1.
Grade Number of measurements
Repeatability:
Age >6yr
Repeatability:
Age ≤ 6yr
A
≥ 3 acceptable
Within 0.150L
Within 0.100 L*
B
2 acceptable
Within 0.150 L
Within 0.100 L*
C
≥ 2 acceptable
Within 0.200 L
Within 0.150 L*
D
≥ 2 acceptable
Within 0.250 L
Within 0.200 L*
E
≥ 2 acceptable
OR 1 acceptable
> 0.250 L
N/A
> 0.200 L*
N/A
U
0 acceptable AND ≥ 1
usable
N/A
N/A
F
0 acceptable and 0 usable
N/A
N/A
*Or 10% of the highest value, whichever is greater; applies for age 6 years or
younger only.
Table 1: Grades
3.2.2. Bronchodilator Responsiveness Testing
Bronchodilator responsiveness testing can be performed on any pre-
test session performed.
1. Select ‘Spirometry’ from the Menu, then select ‘Post’
.
2. Select the relevant pre-test from the list and perform the post-test as
outlined in section 3.2.1 Testing.
Note
: A Post-test may only be completed if an existing Pre-test is
available.
3.2.3. Viewing FVC Test Results
Results may be viewed as either a Volume/time (V/t) or Flow/
Volume (F/V) graph by scrolling across the screens or pressing the
circles
at the top of the screen. Screens viewed in
order: F/V graph, V/t graph, Results screen.
The Results screen displays Best, %Pred, Pred values, z-score, LLN by
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