Table 2.
Descriptive values and number of responders and non-responders by cardioventilatory variables.
| Variables | FB | ONB | Responders | |||||
|---|---|---|---|---|---|---|---|---|
| Tin (s) | 1.4 | ± | 0.6 | 1.0 | ± | 0.3 | 13 | (72.2%) * |
| RER | 0.8 | ± | 0.1 | 0.9 | ± | 0.1 | 12 | (66.7%) |
| Tin/Tot (%) | 44.7 | ± | 7.2 | 41.3 | ± | 5.0 | 10 | (55.6%) |
| Tex (s) | 1.7 | ± | 0.6 | 1.5 | ± | 0.3 | 9 | (50.0%) |
| BF (breaths/min) | 21.2 | ± | 6.7 | 25.1 | ± | 5.2 | 9 | (50.0%) |
| EqO2 (L/min) | 26.5 | ± | 4.2 | 28.4 | ± | 4.0 | 9 | (50.0%) |
| FEO2 (%) | 16.6 | ± | 0.7 | 17.0 | ± | 0.5 | 9 | (50.0%) |
| Tex/Tot (%) | 55.3 | ± | 0.07 | 58.7 | ± | 0.06 | 9 | (50.0%) |
| VTex (L) | 1.6 | ± | 0.5 | 1.4 | ± | 0.4 | 8 | (44.4%) |
| VTin (L) | 1.5 | ± | 0.5 | 1.4 | ± | 0.4 | 8 | (44.4%) |
| FECO2 (%) | 3.2 | ± | 0.6 | 3.0 | ± | 0.5 | 7 | (38.9%) |
| PETCO2 (mmHg) | 4.7 | ± | 0.5 | 4.6 | ± | 0.5 | 7 | (38.9%) |
| VO2 (mL/min) | 1130 | ± | 300 | 1110 | ± | 360 | 7 | (38.9%) |
| PETO2 (mmHg) | 14.4 | ± | 0.8 | 14.6 | ± | 0.6 | 7 | (38.9%) |
| VE (L/min) | 32.1 | ± | 9.0 | 34.5 | ± | 10.2 | 7 | (38.9%) |
| EqCO2 (L/min) | 31.7 | ± | 4.5 | 33.4 | ± | 4.5 | 6 | (33.3%) |
| HR (beats/min) | 109.2 | ± | 17.0 | 108.9 | ± | 15.4 | 5 | (27.8%) |
| VD/VT (L/min) | 24.5 | ± | 8.8 | 26.9 | ± | 8.4 | 5 | (27.8%) |
| VCO2 (mL/min) | 900.2 | ± | 343 | 895.6 | ± | 364 | 2 | (11.1%) |
Descriptive values are shown as mean (standard deviation). Responders/non-responders are shown as number (percentage). * p < 0.05 for one-sample proportion test. Tin: inspiration time; Tin/Tot: inspiratory time fraction; VTex: expiratory tidal volume; FECO2: fraction of expired carbon dioxide; VO2: oxygen uptake; Tex: expiration time; VTin: inspiratory tidal volume;VCO2: carbon dioxide production; HR: heart rate; PETCO2: end-tidal partial pressure of carbon dioxide; FEO2: fraction of expired oxygen; Tex/Tot: expiratory time fraction; BF: breathing frequency; VD/VT: deadspace/tidal volume ratio; RER: respiratory quotient; EqCO2: ventilatory equivalent ratio for carbon dioxide; EqO2: ventilatory equivalent for oxygen;PETO2: end-tidal partial pressure of oxygen; VE: minute ventilation.