Skip to main content

Table 1 Arterial blood gas analyses at different time points during the hospital stay

From: Carbon dioxide narcosis due to inappropriate oxygen delivery: a case report

Time point (see text) A, day 1 B, day 1 C, day 3 D, day 4 E, day 5 F, day 30
O2 flow rate; mode of administration 4 L/min.; non-rebreathing mask 2 L/min.; nasal cannula 2 L/min.; nasal cannula 2 L/min.; non-rebreathing mask 2 L/min.; nasal cannula 2 L/min.; tracheal cannula
pH (7.3–7.4) 7.1 7.3 7.4 7.2 7.4 7.1
PaO2 (kPaa [11.1–14.4]) 10.9 10.4 6.8 6.0 8.1 10.9
PaCO2 (kPaa [4.7–6.4]) 20.0 9.3 7.8 15.8 8.3 20.7
Bicarbonate (mmol/L [24–31]) 41.0 37.5 35.4 42.7 36.7 49.8
Base excess (-1.5 to +3.0) 3.0 8.2 9.1 9.4 10.5 17.7
SaO2 (% [95.0–99.9]) 89.4 92.5 84.8 70.3 88.6 94
Respiratory rate (L/min. [12–16]) ND 30 24 Apneic 30 ND
  1. ND not determined, O 2 oxygen, P a O 2 partial pressure of oxygen in arterial blood, P a CO 2 partial pressure of carbon dioxide in arterial blood, pH power of hydrogen; negative logarithm of the hydrogen ion concentration, S a O 2 percentage of oxygen saturation of arterial blood
  2. aTo convert kPa to mmHg, multiply by 7.5