Causes
- Day 1-2: 'Wind' - Pneumonia, aspiration, pulmonary embolism
- Day 3-5: 'Water' - Urinary tract infection (especially if the patient was catheterised)
- Day 5-7: 'Wound' - Infection at the surgical site or abscess formation
- Day 5+: 'Walking' - Deep vein thrombosis or pulmonary embolism
- Any time: Drugs, transfusion reactions, sepsis, line contamination.