Category Electrolytes
CCC Critical Care compendium 340

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 340

Hyperkalaemia DDx

Overview Hyperkalaemia is defined as serum potassium level > 5.5 mEq/L Hyperkalaemia is potentially life-threatening due to the risk of cardiac dysrhythmias Most patients begin to manifest significant ECG changes at serum levels > 6.5 mEq/L Causes Increased potassium intake…

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 340

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 340

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