Tests per subject: 5 VC manoeuvre
8 FVC manoeuvres
Predicted Values: Various – depends upon national
preference
Transducer: Vyaire Bi-Directional Digital Volume.
Resolution: 10 mL volume 0.03 L/s ow
Accuracy: +/-3%. To ATS recommendations –
Standardisation of spirometry 1994
update for ows and volumes.
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