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
pH7.357.457.56PaCO₂mmHg354521HCO₃⁻mmol/L222618respiratorymetabolicacidosisalkalosis

A practice arterial blood gas shows pH 7.56, PaCO₂ 21 mmHg (2.8 kPa) and HCO₃⁻ 18 mmol/L. Which primary disorder is it? Click the cell in the grid.

pH 7.56PaCO₂ 21 mmHg (2.8 kPa)HCO₃⁻ 18 mmol/L
  1. 1respiratory acidosis
  2. 2metabolic acidosis
  3. 3respiratory alkalosis
  4. 4metabolic alkalosis
2.Easy

A practice blood gas shows PaO₂ 85 mmHg (11.3 kPa) while the inspired oxygen is 70%. Calculate the ratio P/F = PaO₂/FiO₂ in mmHg.

PaO₂ 85 mmHg (11.3 kPa)FiO₂ 70%
P/F = mmHg
3.Medium
pH7.357.457.26PaCO₂mmHg354537HCO₃⁻mmol/L222616uncompensatedpartially compensatedfully compensated

A practice arterial blood gas shows pH 7.26, PaCO₂ 37 mmHg (4.9 kPa) and HCO₃⁻ 16 mmol/L. The primary disorder is metabolic acidosis. How far is it compensated? Click your answer.

pH 7.26PaCO₂ 37 mmHg (4.9 kPa)HCO₃⁻ 16 mmol/L
  1. 1uncompensated
  2. 2partially compensated
  3. 3fully compensated
4.Medium
pH7.357.457.43PaCO₂mmHg354531HCO₃⁻mmol/L222620uncompensatedpartially compensatedfully compensated

A practice arterial blood gas shows pH 7.43, PaCO₂ 31 mmHg (4.1 kPa) and HCO₃⁻ 20 mmol/L. The primary disorder is respiratory alkalosis. How far is it compensated? Click your answer.

pH 7.43PaCO₂ 31 mmHg (4.1 kPa)HCO₃⁻ 20 mmol/L
  1. 1uncompensated
  2. 2partially compensated
  3. 3fully compensated
5.Hard

Practice values: Na⁺ 144, Cl⁻ 95 and HCO₃⁻ 17 mmol/L. Calculate the delta ratio (AG − 12)/(24 − HCO₃⁻), using AG = Na⁺ − (Cl⁻ + HCO₃⁻). Give two decimals.

Na⁺ 144 mmol/LCl⁻ 95 mmol/LHCO₃⁻ 17 mmol/L
delta ratio =
6.Hard

A practice gas shows a metabolic alkalosis with HCO₃⁻ 46 mmol/L. Use expected PaCO₂ = 0.7·HCO₃⁻ + 21 to find the expected PaCO₂.

HCO₃⁻ 46 mmol/L
PaCO₂ = mmHg

Answer key

  1. 1. respiratory alkalosis
  2. 2. P/F = 121.4 mmHg
  3. 3. uncompensated
  4. 4. fully compensated
  5. 5. delta ratio = 2.857
  6. 6. PaCO₂ = 53.2 mmHg

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