Saturday 29 September 2012

Syndrome of inappropriate ADH secretion (SIADH)

  • Inappropriate ADH secretion leads to retention of water and hyponatraemia

Aetiology
  • Tumours
    • Prostate cancer
    • Small cell carcinoma of lung
    • Pancreatic cancer
  • Lungs
    • Pneumonia
    • TB
  • CNS
    • Meningitis
    • Tumours
    • Head injury
    • Chronic subdural haematoma
    • SLE vasculitis
  • Drugs
    • Chlorpropamide
    • Carbamezepine
    • Phenothiazines

Clinical features
  • Confusion
  • Nausea
  • Fits
  • Coma

Management
  • Underlying cause
  • Fluid restriction
  • Dimethylchlortetracycline

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