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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1.Easy

A practice blood gas shows PaO₂ 79 mmHg (10.5 kPa) while the inspired oxygen is 24%. Calculate the ratio P/F = PaO₂/FiO₂ in mmHg.

PaO₂ 79 mmHg (10.5 kPa)FiO₂ 24%
P/F = mmHg
2.Easy

A practice blood gas shows PaO₂ 71 mmHg (9.5 kPa) while the inspired oxygen is 28%. Calculate the ratio P/F = PaO₂/FiO₂ in mmHg.

PaO₂ 71 mmHg (9.5 kPa)FiO₂ 28%
P/F = mmHg
3.Medium
pH7.357.457.29PaCO₂mmHg354532HCO₃⁻mmol/L222615uncompensatedpartially compensatedfully compensated

A practice arterial blood gas shows pH 7.29, PaCO₂ 32 mmHg (4.3 kPa) and HCO₃⁻ 15 mmol/L. The primary disorder is metabolic acidosis. How far is it compensated? Click your answer.

pH 7.29PaCO₂ 32 mmHg (4.3 kPa)HCO₃⁻ 15 mmol/L
  1. 1uncompensated
  2. 2partially compensated
  3. 3fully compensated
4.Medium
pH7.357.457.44PaCO₂mmHg354557HCO₃⁻mmol/L222637uncompensatedpartially compensatedfully compensated

A practice arterial blood gas shows pH 7.44, PaCO₂ 57 mmHg (7.6 kPa) and HCO₃⁻ 37 mmol/L. The primary disorder is metabolic alkalosis. How far is it compensated? Click your answer.

pH 7.44PaCO₂ 57 mmHg (7.6 kPa)HCO₃⁻ 37 mmol/L
  1. 1uncompensated
  2. 2partially compensated
  3. 3fully compensated
5.Hard
pH7.357.457.20PaCO₂mmHg354542HCO₃⁻mmol/L222616appropriate compensationadded respiratory acidosisadded respiratory alkalosis

A practice gas shows a metabolic acidosis: pH 7.20, PaCO₂ 42 mmHg (5.6 kPa), HCO₃⁻ 16 mmol/L. Compare the measured PaCO₂ with Winter’s formula. Click your interpretation.

pH 7.20PaCO₂ 42 mmHg (5.6 kPa)HCO₃⁻ 16 mmol/L
  1. 1appropriate compensation
  2. 2added respiratory acidosis
  3. 3added respiratory alkalosis
6.Hard

Practice values: Na⁺ 135, Cl⁻ 97, HCO₃⁻ 20 mmol/L and albumin 19 g/L. Find the albumin-corrected anion gap AGc = AG + 0.25·(40 − albumin).

Na⁺ 135 mmol/LCl⁻ 97 mmol/LHCO₃⁻ 20 mmol/Lalbumin 19 g/L
AGc = mmol/L

Answer key

  1. 1. P/F = 329.2 mmHg
  2. 2. P/F = 253.6 mmHg
  3. 3. partially compensated
  4. 4. fully compensated
  5. 5. added respiratory acidosis
  6. 6. AGc = 23.25 mmol/L

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