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May 16, 2024

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Electrolyte Replacement


Significant electrolyte depletion can result in serious complications. These guidelines are meant to assist with empiric dosing of electrolytes for inpatients. Doses may need to be adjusted based on patient-specific factors, including creatine & cardiac status; & responses to initial doses.

  • Goal serum potassium concentration 4.0 – 5.0 mEq/L
  • Goal serum ionized calcium concentration 1.12 – 1.3 mmol/L
  • Goal serum magnesium concentration 2.0 – 2.4 mg/dL
  • Goal serum phosphorus concentration 2.7 – 4.6 mg/dL

IV electrolyte replacement can produce life-threatening complications, serious arrhythmias & phlebitis; therefore, supplementation must be carefully monitored.  There are multiple underlying factors for electrolyte disorders in adult inpatients, including alterations in absorption, distribution, hormonal, and/or homeostatic mechanisms that can all cause disturbances. Treating the underlying cause and prescribing adequate therapy is essential for repletion. In addition, the intracellular vs. extracellular electrolyte concentrations must be considered. Due to distribution variances, labs may not directly correlate with true electrolyte levels. Therefore, continuous monitoring is essential to properly replete patients.

 

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