Table 4.
Exhaled carbon monoxide, end tidal CO2, and peripheral oxygen saturation.
| Et-CO2 target | 30 mmHg (hyperventilation) | 40 mmHg (normoventilation) | 50 mmHg (hypoventilation) | ||
|---|---|---|---|---|---|
| Inspiration | Normal | Deep | Normal | Deep | Normal |
| eCO (ppm) | 10.3 (0.8) | 9.7 (0.8) | 11.5 (0.8) | 10.8 (0.8) | 11.9 (0.8) |
| Pre-test etCO2 (mmHg) | 29.4 (1.6) | 28.7 (1.6) | 39.4 (1.7) | 39.2 (1.7) | 49.1 (1.7) |
| Test etCO2 (mmHg) | 37.8 (2.5) | 35.6 (2.8) | 46.1 (3.3) | 43.0 (2.9) | 51.6 (3) |
| SpO2 (%) | 99 (1) | 98 (1) | 96 (2) | ||
Means (standard deviations) of exhaled carbon monoxide (eCO) values, end tidal CO2 values measured before and during breath sampling (respectively pre-test etCO2 and test etCO2), and peripheral oxygen saturation (SpO2).
Statistical analysis. EtCO2: pre-test Vs test p < 0.01. SpO2: ANOVA p < 0.01; hyperventilation Vs normoventilation p < 0.01; hyperventilation Vs normoventilation p < 0.01.