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Table 4 Exhaled carbon monoxide, end tidal CO2, and peripheral oxygen saturation.

From: Effects of acute hypoventilation and hyperventilation on exhaled carbon monoxide measurement in healthy volunteers

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 etCO 2 (mmHg) 29.4 (1.6) 28.7 (1.6) 39.4 (1.7) 39.2 (1.7) 49.1 (1.7)
Test etCO 2 (mmHg) 37.8 (2.5) 35.6 (2.8) 46.1 (3.3) 43.0 (2.9) 51.6 (3)
SpO 2 (%) 99 (1) 98 (1) 96 (2)
  1. 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).
  2. 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.