08.00 h | 20.00 h | |
VC (ml)* | 704 (195) (573 to 835) | 642 (153) (539 to 745) |
RR (breaths/min)** | 19.6 (2.5) (17.9 to 21.2) | 25.8 (8.1) (20.4 to 31.2) |
Ti/Ttot | 0.44 (0.04) (0.41 to 0.47) | 0.44 (0.05) (0.4 to 0.47) |
MIP (cm H2O) | 14 (5.6) (10.2 to 17.7) | 13.6 (6.1) (9.5 to 17.7) |
TT0.1** | 0.046 (0.021) (0.031 to 0.06) | 0.081 (0.035) (0.58 to 0.1) |
Tlim (s)* | 202 (197) (70 to 334) | 149 (183) (26 to 172) |
Tcco2 (mm Hg) | 45.5 (7.8) (40.3 to 50.8) | 46.3 (7.9) (40.9 to 51.6) |
Data are presented as mean (SD) with 95% confidence intervals.
VC, vital capacity; RR, respiratory rate; Ti, inspiratory time; Ttot, total breath time; Ti/Ttot, duty cycle; MIP, maximum inspiratory pressure; TT0.1, tension-time index; Tlim, muscle endurance time; Tcco2, transcutaneous carbon dioxide tension.
*p<0.05; **p<0.01 (paired t test 08.00 vs 20.00 h).