Effect of nocturnal assisted ventilation on daytime versus nocturnal PCO2 in COPD
Effect of nocturnal assisted ventilation on daytime versus nocturnal PCO2 in COPD
There was a close correlation between change in daytime arterial tension of carbon dioxide (vertical axis) and change in mean overnight transcutaneous tension of carbon dioxide (horizontal axis) for individual patients with COPD after three months of nocturnal assisted ventilation.
PaCO2: arterial tension of carbon dioxide; PtCO2: transcutaneous tension of carbon dioxide.
Redrawn from Meecham-Jones DJ, Paul EA, Jones PW, Wedzicha JA. Am J Respir Crit Care 1995; 152:538.