Last reviewed 01/2018

  • chest radiograph
  • ECG - look for signs of myocardial infarction
  • U and E's
  • blood gases - normally low PaCO2 due to hyperventilation; usually a low PaO2
  • lung function tests - not appropriate in an emergency admission:
    • restrictive ventilatory impairment
    • VC is reduced and the FEV1 is reduced in proportion. The forced expiratory ratio is normal or higher than normal.