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Category Electrolytes
CCC Critical Care Compendium 680

Hypermagnesaemia

Hypermagnesaemia: Serum Mg above normal range of 1.3-2.2 mEq/L; Rare and usually iatrogenic; ↑Magnesium is closely associated with ↑K and ↓Ca
CCC Critical Care Compendium 680

Hyperkalaemia DDx

Overview Causes Increased potassium intake (rare) Increased release from tissues Decreased renal excretion Transcellular shift Factitious (Pseudo-hyperkalaemia) Drugs causing hyperkalaemia References and Links LITFL

CCC Critical Care compendium 340

Cerebral Salt Wasting

Cerebral Salt Wasting: also now known as renal salt wasting; hyponatraemia not always required to make diagnosis, but often present; cerebral lesion + excess renal loss of Na+ and Cl-; cerebral lesions: SAH, TBI, tumour
CCC Critical Care Compendium 680

Hypercalcaemia DDx

Hypercalcaemia: Nature: Bones, stones, groans and psychic moans. Usually associated with increased calcium release form bones and impaired renal removal and malignancy
CCC Critical Care Compendium 680

Hypomagnesaemia

Hypomagnesaemia: Defined as serum magnesium < 0.75 mmol/L; associated with increased ICU mortality common — affects 10-65% of ICU patients
CCC Critical Care compendium 340

Magnesium

Magnesium: intracellular cation; hypomagnesaemia = common electrolyte abnormality in ICU