48
E
xpiratory time (Te)
Ti as a % of total breath time (Ti/Ttot)
Tidal volume as a % of Ti (TV/Ti)
Tests per subject: 5 VC manoeuvre
8 FVC manoeuvres
Predicted Values: Various – depends upon national
preference
Transducer: CareFusion Bi-Directional Digital Volume.
Resolution: 10ml volume 0.03l/s flow
Accuracy: +/-3%. To ATS recommendations –
Standardisation of spirometry 1994
update for flows and volumes.
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