Clinical - Renal/Urine/Electrolytes, Generic Clinical Sciences

Shift K+ from plasma back into the cell: intravenous glucose (25 to 50 g dextrose, or 1-2 amps D50) plus 5-10 U regular insulin will reduce serum potassium levels within 10 to 20 minutes, and the effects last 4 to 6 hours, hyperventilation , β-agonists . In the past, bicarbonate (1 mEq/kg, or 1-2 amps in a typical adult) was recommended, however keep in mind that bicarbonate rarely helps , and furthermore binds Ca++ , which may be counterproductive. Note that in the setting of liver tranplantation, prophylactic insulin and glucose has been suggested.

Increase renal excretion: diuretics (furosemide, 20-40 mg IV), resin exchange , dialysis , aldosterone agonists (fludrocortisone )

Acute Hyperkalemia Treatment

  • Membrane Stabilization: CaCl2
  • K+ Shift: glucose/insulin, induce alkalosis (bicarbonate, hyperventilation), β-agonists
  • K+ Excretion: furosemide, resins, fludrocortisone, dialysis 

Causes of acute hyperkalemia: drugs (succinylcholine, ACE/ARB’s, mannitol, spironolactone, digitalis, non-selective beta blockers) that cause decreased renal K+ excretion, reperfusion of an organ/vascular bed after ischemia (usually greater than 4 hours), adrenal inhibition or decreased aldosterone levels, transcellular shifts (intracellular to extracellular), often caused by acidosis, acute renal failure

Symptoms: mild elevation (6-7 mEq/L) can cause peaked T-waves on EKG tracing, 10-12 mEq/L can cause prolonged PR interval, widened QRS, VFib, Asystole. Clinical symptoms are muscle weakness and paralysis.


    Kidney Int;1993 Jan;43(1):212-7

    [PubMed: 8433561]

    Anesthesiology;1993 Apr;78(4):677-82

    [PubMed: 8466068]


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