Rebound hypoxaemia after administration of oxygen in an acute exacerbation of chronic obstructive pulmonary disease

An obvious point is to monitor oxygen saturations continuously in
patients with compromised respiratory status, and not to allow the oxygen
saturation to fall below a critical level, even if this entails face mask
ventilation or intubation. Hypercapnea, per se, is rarely fatal. The same
cannot be said of profound hypoxaemia.