End-tidal CO2 is increased to maximum level in :

B i.e. Malignant hypehermia Unilateral absence (or decrease) of breath sounds over one lung (especially left) after a speedy intubation suggests a diagnosis of inadveent endobronchial intubation. End tidal CO2 may be low, normal or raised after an endotracheal intubation. Tlie presence of high end tidal CO2 however excludes a diagnosis of esophageal intubation which is associated with reduced or absent end tidal CO2. Malignant hypehermia show marked rise in ETCO2.