Arterial blood gas interpretation worksheet with answers

Free printable Arterial blood gas interpretation worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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Name: ____________________   Date: ____________

1.Easy
pH7.357.457.57PaCO₂mmHg354527HCO₃⁻mmol/L222624respiratorymetabolicacidosisalkalosis

A practice arterial blood gas shows pH 7.57, PaCO₂ 27 mmHg (3.6 kPa) and HCO₃⁻ 24 mmol/L. Which primary disorder is it? Click the cell in the grid.

pH 7.57PaCO₂ 27 mmHg (3.6 kPa)HCO₃⁻ 24 mmol/L
  1. 1respiratory acidosis
  2. 2metabolic acidosis
  3. 3respiratory alkalosis
  4. 4metabolic alkalosis
2.Easy

A practice blood gas shows PaO₂ 103 mmHg (13.7 kPa) while the inspired oxygen is 35%. Calculate the ratio P/F = PaO₂/FiO₂ in mmHg.

PaO₂ 103 mmHg (13.7 kPa)FiO₂ 35%
P/F = mmHg
3.Medium

Practice values: Na⁺ 144 mmol/L, glucose 17.7 mmol/L and urea 16.4 mmol/L. Calculate the serum osmolality Osm = 2·Na⁺ + glucose + urea to the nearest whole number.

Na⁺ 144 mmol/Lglucose 17.7 mmol/Lurea 16.4 mmol/L
Osm = mOsm/kg
4.Medium
pH7.357.457.61PaCO₂mmHg354542HCO₃⁻mmol/L222641uncompensatedpartially compensatedfully compensated

A practice arterial blood gas shows pH 7.61, PaCO₂ 42 mmHg (5.6 kPa) and HCO₃⁻ 41 mmol/L. The primary disorder is metabolic alkalosis. How far is it compensated? Click your answer.

pH 7.61PaCO₂ 42 mmHg (5.6 kPa)HCO₃⁻ 41 mmol/L
  1. 1uncompensated
  2. 2partially compensated
  3. 3fully compensated
5.Hard
pH7.357.457.32PaCO₂mmHg354528HCO₃⁻mmol/L222614added normal-gap acidosispure high-gap acidosisadded metabolic alkalosis

A practice gas shows pH 7.32, PaCO₂ 28 mmHg (3.7 kPa) and HCO₃⁻ 14 mmol/L, with Na⁺ 146 and Cl⁻ 92 mmol/L. Use the anion gap and the delta ratio to click the best interpretation.

pH 7.32PaCO₂ 28 mmHg (3.7 kPa)HCO₃⁻ 14 mmol/LNa⁺ 146 mmol/LCl⁻ 92 mmol/L
  1. 1added normal-gap acidosis
  2. 2pure high-gap acidosis
  3. 3added metabolic alkalosis
6.Hard
pH7.357.457.32PaCO₂mmHg354534HCO₃⁻mmol/L222617added normal-gap acidosispure high-gap acidosisadded metabolic alkalosis

A practice gas shows pH 7.32, PaCO₂ 34 mmHg (4.5 kPa) and HCO₃⁻ 17 mmol/L, with Na⁺ 146 and Cl⁻ 95 mmol/L. Use the anion gap and the delta ratio to click the best interpretation.

pH 7.32PaCO₂ 34 mmHg (4.5 kPa)HCO₃⁻ 17 mmol/LNa⁺ 146 mmol/LCl⁻ 95 mmol/L
  1. 1added normal-gap acidosis
  2. 2pure high-gap acidosis
  3. 3added metabolic alkalosis

Answer key

  1. 1. respiratory alkalosis
  2. 2. P/F = 294.3 mmHg
  3. 3. Osm = 322 mOsm/kg
  4. 4. uncompensated
  5. 5. added metabolic alkalosis
  6. 6. added metabolic alkalosis

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