Base Excess

Aka: Base Excess, Base Deficit

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II. Calculation

  1. Base Excess = (Actual_pH - Predicted_pH) * 67
  2. Calculate predicted pH based on PaCO2 (see Blood Gas)

III. Interpretation: Normal

  1. Range: -2 to +2 meq/L

IV. Interpretation: General

  1. Positive (Base Excess)
    1. Metabolic Alkalosis
  2. Negative (Base Deficit)
    1. Metabolic Acidosis

V. Interpretation: Neonatology

  1. Severe Acidosis (Base Excess < -10)
    1. Calculate Total Body Bicarbonate deficit
      1. Deficit = (Base Deficit) x (Weight in kg) x 0.3
    2. Administer 25% of bicarbonate deficit (~1 meq/kg)

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