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Chapter 5 Using NIOX VERO
®
000190-09 NIOX VERO
®
User Manual US
19
•
Non-smoker.
•
Expected stable FeNO values between 5 and 40 ppb.
•
Preferably no allergies (except seasonal, see below) or asthma.
A QC tester will be qualified over the course of four days within a seven day
period
Note:
After a QC tester has been qualified, if the most recent QC
measurement is older than 30 days, then the qualification is
suspended and the QC tester needs to re-qualify according to the
qualification procedure. Perform four QC measurements, one per
day within seven days, according to the QC measurement section, in
order to qualify a QC tester.
A mean value is calculated from the three qualifying measurements that must
be between 5-40 ppb for the QC tester to be qualified. The QC measurement
on the fourth day (daily QC) must be within ± 10 ppb from the mean value and
the negative control approved. If this has been met the Quality Control has
passed for that staff member and the instrument is ready for clinical use. The
moving mean value is recalculated when the QC tester performs a QC mea-
surement after seven days.
5.8.2
QC measurement
This procedure applies for qualification and daily QC measurements. The in-
strument will prompt for a daily QC procedure by showing
in the status
bar or when there are no staff who are currently qualified as a tester. Always
consider the following in order to obtain reliable results.
Before any measurement:
•
Avoid nitrate rich food for up to 3 hrs before the measurement.
•
Avoid strenuous exercise at least 1 hour before the measurement.
•
Preferably do not perform a measurement in case of:
• Ongoing cold
• Acute seasonal allergy
•
Always attach a new patient filter for each new QC tester.
1.
Select
QC
.
2.
Select
QC Settings
to verify which QC IDs are available.
Note:
Each QC tester must select an individual number.
3.
Select an available
QC ID.
4.
Empty the lungs by breathing out thoroughly.
5.
Put the NIOX VERO
®
patient filter to your mouth making sure no air
leakage occurs.
6.
Inhale deeply through the patient filter to total lung capacity. During
inhalation, the cloud on the display moves upwards.
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