Results of parameters measured using two different test gases, 17.5% inspired oxygen fraction (FI,O2) compared with 21% FI,O2
| FI,O2 | Mean difference | ||
| 17.5% | 21% | ||
| TL,CO,sb mmol·min−1·kPa−1 | 11.98±2.68*** | 11.38±2.56 | 0.60±0.88 |
| CVi TL,CO,sb % | 2.10±1.70# | 2.24±1.57 | |
| TL,CO,sb,%ERS % | 108.6±15.8*** | 103.1±14.9 | |
| KCO,sb mmol·min−1·kPa−1·l−1 | 1.98±0.24*** | 1.90±0.23 | 0.08±0.15 |
| CVi KCO,sb % | 2.22±1.53# | 2.50±2.01 | |
| KCO,sb,%ERS % | 112.2±15.7*** | 107.4±14.8 | |
| VA,eff,sb,l | 6.04±1.13# | 6.00±1.12 | |
| VA,eff,sb/TLCpleth % | 96.1±4.4 | ||
| VC%ERS | 103.8±10.7 | ||
Data are presented as mean±sd
TL,CO,sb: single-breath transfer factor
CVi TL,CO,sb: intra-individual coefficient of variation of TL,CO,sb
TL,CO,sb,%ERS: single-breath transfer factor as a percentage of ERS predicted
KCO,sb: single-breath transfer coefficient
CVi KCO,sb: intra-individual coefficient of variation of KCO,sb
KCO,sb,%ERS: single-breath transfer coefficient as a percentage of ERS predicted
VA,eff,sb: effective alveolar volume, measured during single-breath
VA,eff,sb/TLCpleth: effective alveolar volume, measured during single-breath, as a percentage of total lung capacity measured during plethysmography
VC%ERS: vital capacity as a percentage of ERS predicted
#nonsignificant
*** p<0.001 from 21% FI,O2