Table 1.
Results of barometric whole-body plethysmography (BWBP) measurements with automatic elimination (AE) alone (AEA method) and with AE plus simultaneous visual inspection (SVI) (SVI-AE method)
| BWBP parameters | AEA method | SVI-AE method |
|---|---|---|
| RR (breaths per minute)* | 56 (44–73) | 50 (40–62) |
| TV (ml) | 26.7 (21.2–35.0) | 27.2 (21.1–35.1) |
| MV (ml)* | 1473.7 (1281.7–1658.9) | 1401.5 (1191.8–1599.9) |
| Ti (s)* | 0.47 (0.37–0.62) | 0.51 (0.40–0.63) |
| Te (s)* | 0.72 (0.52–0.85) | 0.74 (0.57–0.94) |
| PIF (ml/s)* | 82.4 (76.2–100.3) | 79.7 (70.3–94.1) |
| PEF (ml/s)* | 71.2 (61.5–93.0) | 66.2 (55.6–80.7) |
| RT (s)* | 0.35 ± 0.11 | 0.37 ± 0.11 |
| PAU | 1.00 (0.85–1.18) | 0.93 (0.80–1.13) |
| Penh † | 0.81 (0.68–1.09) | 0.77 (0.63–1.09) |
Data are presented as mean ± SD or median with interquartile range (IQR)
Statistically significant differences:
†
P <0.05
*
P <0.005 (based on Bonferroni correction)
RR = respiratory rate; TV = tidal volume; MV = minute volume; Ti = inspiratory time; Te = expiratory time; PIF = peak inspiratory flow; PEF = peak expiratory flow; RT = relaxation time (the time point when 65% of tidal volume is expired); PAU = pause, a unitless parameter ([Te – RT/RT]); Penh = enhanced pause, a unitless parameter [PEF/PIF] × PAU)