Hypokalemia
Definition:
- Serum <3.5mmol/L
Etiology:
- Intracellular shifts: Hypothermia, Exogenous insulin/refeeding, beta-agonists
- Potassium loss: renal vs extrarenal (generally GI)
Evaluation:
- Review medication list
- Basic labs: Serum BMP, Mg
- Distinguish renal from GI losses with urine potassium.