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ENG
DT_0006 Issue 15
A Global Leader in Respiratory Solutions
2. Select a subject and ensure the required demographic information is
entered.
3. Wash hands (operator and subject).
4. Fit a new Bacterial Viral Filter (BVF) to the owhead for each test
subject. The use of a disposable noseclip is recommended.
5. Instruct and demonstrate the test.
3.2.1. Testing
1
1. Select either ‘VC Test’ or ‘FVC Test’ option from the Main Menu.
2. Select how the results should be presented:
• VC Test – Select from Volume/Time (V/T) graph and Volume
(Bar Chart).
• FVC Test – Select from Volume/Time (V/T) graph and Flow/
Volume (F/V) graph.
3. Wait for the ‘Exhale to Begin’ icon to appear. The device is now
ready to accept a blow.
Example script:
• Sit upright, t the nose clip and relax.
• Place BVF in mouth and close lips around the mouthpiece.
• Seal your lips around the mouthpiece and keep your tongue down.
• Breathe normally.
VC test session
a. Inhale completely with a brief pause when your lungs are completely
full (≤ 2 secs).
b. Exhale with no hesitation until no more air can be expelled while
maintaining an upright posture. It is vital that the operator
encourages the subject to keep exhaling to ensure all air
is expelled (when a plateau has been reached or forced
expiratory time (FET) reaches 15 seconds).The operator
should repeat instructions as necessary, coaching
vigorously.
c. Breathe in with maximal effort until completely full. The manoeuvre is now
complete and the BVF is removed from the mouth.
d. Listen for two beeps. The device is now ready for the next blow.
e. Repeat for a minimum of three manoeuvres, usually no more than eight
for adults.
f. Check VC repeatability and perform more manoeuvres as necessary.
Note: A single-breath VC technique may also be performed on the device.
1 Derived from terminology and guidance taken from ATS/ERS Standardisation of Spirometry 2019 Update Am J Respir Crit
Care Med 2019 Vol 200, Iss 8 pp e70-e88
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