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Table 3 Exhaled carbon monoxide values registered in laboratory A and B.

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
Lab A (0.8 ppm) 10.2(0.9) 9.6(0.8) 11.4(0.8) 10.7(0.8) 11.8(0.9)
Lab B (1.7 ppm) 10.3(0.7) 9.7(0.7) 11.6(0.8) 10.8(0.8) 11.9(0.7)
Total 10.3(0.8) 9.7(0.8) 11.5(0.8) 10.8(0.8) 11.9(0.8)
  1. Means (standard deviations) of exhaled carbon monoxide (eCO) values registered in laboratory A and B (environmental eCO level 0.8 and 1.7 ppm, respectively). Values are reported as particles per milion (ppm) .
  2. Statistical analysis: ANOVA: LabA Vs Lab B non significant; hyperventilation Vs normoventilation p < 0.01; hyperventilation Vs normoventilation p < 0.01; normal inspiration Vs deep inspiration p < 0.01.