Fluid and Electrolyte Changes in Major Surgery

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Fluid and Electrolyte Changes in Major Surgery


  • phase of relative oliguria and sodium retention
  • polyuric phase

Aldosterone secretion

  • promotes active reabsorption of sodium from distal convoluted tubules
  • secretion of potassium and hydrogen
  • urine
    • low volume
    • acidic
    • low sodium concentration
    • increased potassium
  • metabolic alkalosis

ADH secretion

 

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