Tag Electrolytes
CCC Critical Care compendium 340

Potassium

Potassium is major intracellular cation (sodium is major extracellular) – 90% is exchangeable (70% for sodium). Equilibrium potential of -90mV
CCC Critical Care compendium 340

Hypokalaemia

Hypokalaemia: the most common electrolyte abnormality in hospitalised patients; mostly caused by drugs and GI disease
CCC Critical Care compendium 340

Hypernatraemia

Hypernatraemia can be caused by a number of critical illnesses: water depletion (decreased intake, hypotonic fluid loss – renal/non-renal); solute excess (Na+ or other)
CCC Critical Care compendium 340

Calcium basics

Calcium is the most abundant mineral in the body. 1.5% of body weight; 99% is in bone matrix; 1100gramm (27mmol)