Urgent Investigation in Delirium
Blood glucose- Plasma sodium, potassium, urea and creatinine
- Liver function tests, albumin and calcium
- Full blood count
- Prothrombin time or international normalized ratio (INR) if suspected liver disease
- C-reactive protein
- Blood culture if temperature <36 or >38°C
- Urine stick test; microscopy and culture if stick test abnormal or evidence of sepsis
- ECG
- Chest X-ray
- Arterial blood gases if arterial oxygen saturation <92% or new chest signs
- Neuroimaging, if indicated: see text (point 4)
- Lumbar puncture, if indicated: see text (point 5)
- EEG, if indicated: see text
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