Anion gap

Anion gap - calculated by?

(sodium + potassium) - (bicarbonate + chloride)
A normal anion gap?

8-14 mmol/L
Useful to consider when?

Metabolic acidosis - normal anion gap / raised
Causes of a normal anion gap or hyperchloraemic metabolic acidosis (5)
- - gastrointestinal bicarbonate loss: diarrhoea, ureterosigmoidostomy, fistula
- - renal tubular acidosis
- - drugs: e.g. acetazolamide
- - ammonium chloride injection
- - Addison's disease
Causes of a raised anion gap metabolic acidosis? (4)
- - lactate: shock, hypoxia
- - ketones: diabetic ketoacidosis, alcohol
- - urate: renal failure
- - acid poisoning: salicylates, methanol

Author

trincam2008

346206

Card Set

Anion gap

Description

Anion gap

Updated

2019-03-31T00:16:19Z