Lab Data for Fluid, Electrolyte and Acid-Base Imbalances

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Author:
kelc
ID:
67877
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Lab Data for Fluid, Electrolyte and Acid-Base Imbalances
Updated:
2011-02-21 13:32:37
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lab numbers
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Description:
fluid, electrolyte and acid-base imbalances - implications
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  1. Fluid and Electrolyte imbalances - what electrolytes are involved?
    • alterations in sodium
    • potassium
    • magnesium
    • calcium
    • phosphates
    • chloride
    • bicarbonate (venous carbon dioxide concentrations)
  2. Fluid and Electrolyte imbalances - related to loss of ECF or gain of solutes
    • increase in hematocrit
    • increased BUN
    • increased sodium
    • increased osmolality in serum
  3. Fluid and Electrolyte imbalance - related to gain of ECF or loss of solutes
    • decrease in hematocrit
    • decreased BUN
    • decreased sodium
    • decreased osmolality in serum
  4. Metabolic Alkalosis - lab values
    • pH > 7.45
    • PaCO2 normal or > 45 mm Hg if lungs are compensating
    • PaO2 normal
    • O2 saturations (SO2) normal
    • HCO-3 > 26 mEq/L
    • Ionized calcium < 4.5 mg/dL
    • K+ < 3.5 mEq/L
  5. Metabolic Acidosis - lab values
    • pH < 7.35
    • PaCO2 normal or < 35 mm Hg if lungs are compensating
    • PaO2 normal
    • O2 saturation normal
    • HCO3- < 22 mEq/L
    • K+ > 5 mEq/L
  6. Respiratory Alkalosis - lab values
    • pH > 7.45
    • PaCO2 < 35 mm Hg
    • PaO2 normal
    • O2 saturation normal
    • HCO-3 < 22 mEq/L
    • Ionized calcium < 4.5 mg/dL
    • K+ < 3.5 mEq/L
  7. Respiratory Acidosis - lab values
    • pH < 7.35
    • PaCO2 > 45 mm Hg
    • PaO2 normal or < 80 mm Hg, depending on cause of acidosis
    • SaO2 normal or < 95%, depending on cause of acidosis
    • HCO3- normal if early respiratory acidosis or > 26 mEq/L if kidneys are compensating
    • K+ > 5 mEq/L

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