Cosmed Quark PFT, Manual

Page: 29 / 148

Chapter 2 - Measurements - 29
Ttot sec Duration of Total breathing cycle
Ti/Ttot —- Ti/Ttot ratio
Vt/ti l/sec Vt/ti ratio
MVV - Maximum Voluntary Ventilation
Symbol UM Parameter
MVV l/min Maximum Voluntary Ventilation
MVt l Tidal Volume (during MVV)
MRf 1/min Maximum Respiratory frequency
MVVt sec MVV duration time
Bronchoprovocation Response
Symbol UM Parameter
FallFEV1 % Fall in FEV1 from baseline or post diluent
FallVmax50% % Fall in Vmax50% from baseline or post diluent
P10 —- Provocative dose causing FEV1 to fall 10% from baseline
P15 —- Provocative dose causing FEV1 to fall 15% from baseline
P20 —- Provocative dose causing FEV1 to fall 20% from baseline
Multi-breath Nitrogen wash-out
Symbol UM Parameter
FRC l Functional Residual Capacity
RV l Residual Volume
TLC l Total Lung Capacity
Vtot l Total volume during the test
FetN2 % Final Nitrogen Concentration
Wash-out time m Duration of wash-out
VDA L Anatomic dead space
LCI mm:ss Lung Clearance Index
AMDN mm:ss Mean Dilution Number
FRC/TLC % FRC/TLC ratio
CEV l Cumulated Volume of inspired Oxygen
RV/TLC % RV/TLC ratio (Motley index)
Closing Volume test
Symbol UM Parameter
CV l Closing Volume
VC(c.v.) l Expired volume during wash-out
V_I l Related Volume at the end of phase I
V_II l Related Volume at the end of phase II
V_III l Related Volume at the end of phase III
m, q, R^2 l Parameters of the linear fitting on the alveolar plateau
CV/VC% % CV as a percentage of VC
VDf ml Dead volume (Fowler)
CO diffusion Test
Symbol UM Parameter
DLco ml/min/mmHg CO Diffusion Capacity
DLco 3eq ml/min/mmHg DLco computed with the Three Equations method.