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Hyponatraemia - Coggle Diagram
Hyponatraemia
Causes SIADH
Drugs
Antidepressants
Antipsychotics
Chemotherapy
Vincristine
Cyclophosphamide
Malignancy
Lung
CNS
Infection
Trauma
Ischeamia
Haemorrhage
Management
Seizures
Control cerebral oedema
3% hypertonic
Correct Na by 8-10mmol/24 hours
SIADH
Fluid restriction
Demeclocyline 600-1200mg/day
ADH receptor antagonists
Conivaptan
Classification
Tonicity of the extracellular fluid
Osmolality HIgh
Hyperglycaemia
Mannitol
Osmolality normal
Psudohyponatraemia
Hyperlipidaemia
hyperproteinaemia
Osmolality low
Hypovolaemic
Renal UNa >20
Diuretics
Extrarenal UNa <20
GI losses
Burns
Pancreatitis
Euvolaemic
UNa>20
Hypothyroidism
Adrenal insufficiency
SIADH
UNa <20
Low salt intake (beer potomania)
Psychogenic polydipsia
HYpervolaemic
UNa <20
CCF
Nephrotic syndrome
Cirrhosis
UNa >20
Renal failure