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
pH7.357.457.13PaCO₂mmHg354575HCO₃⁻mmol/L222624respiratorymetabolicacidosisalkalosis

A practice arterial blood gas shows pH 7.13, PaCO₂ 75 mmHg (10.0 kPa) and HCO₃⁻ 24 mmol/L. Which primary disorder is it? Click the cell in the grid.

pH 7.13PaCO₂ 75 mmHg (10.0 kPa)HCO₃⁻ 24 mmol/L
  1. 1respiratory acidosis
  2. 2metabolic acidosis
  3. 3respiratory alkalosis
  4. 4metabolic alkalosis
2.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
3.Medium
pH7.357.457.20PaCO₂mmHg354576HCO₃⁻mmol/L222629uncompensatedpartially compensatedfully compensated

A practice arterial blood gas shows pH 7.20, PaCO₂ 76 mmHg (10.1 kPa) and HCO₃⁻ 29 mmol/L. The primary disorder is respiratory acidosis. How far is it compensated? Click your answer.

pH 7.20PaCO₂ 76 mmHg (10.1 kPa)HCO₃⁻ 29 mmol/L
  1. 1uncompensated
  2. 2partially compensated
  3. 3fully compensated
4.Medium

Practice values: Na⁺ 152 mmol/L, glucose 16.4 mmol/L and urea 17.4 mmol/L. Calculate the serum osmolality Osm = 2·Na⁺ + glucose + urea to the nearest whole number.

Na⁺ 152 mmol/Lglucose 16.4 mmol/Lurea 17.4 mmol/L
Osm = mOsm/kg
5.Hard

Practice values: Na⁺ 136, Cl⁻ 101, HCO₃⁻ 19 mmol/L and albumin 18 g/L. Find the albumin-corrected anion gap AGc = AG + 0.25·(40 − albumin).

Na⁺ 136 mmol/LCl⁻ 101 mmol/LHCO₃⁻ 19 mmol/Lalbumin 18 g/L
AGc = mmol/L
6.Hard
pH7.357.457.23PaCO₂mmHg354582HCO₃⁻mmol/L222633acutechronicacute on chronic

A practice gas shows a respiratory acidosis: pH 7.23, PaCO₂ 82 mmHg (10.9 kPa), HCO₃⁻ 33 mmol/L. Use the rules ‘HCO₃⁻ rises 1 mmol/L per 10 mmHg (acute) or 3.5 mmol/L per 10 mmHg (chronic)’ to classify it. Click your answer.

pH 7.23PaCO₂ 82 mmHg (10.9 kPa)HCO₃⁻ 33 mmol/L
  1. 1acute
  2. 2chronic
  3. 3acute on chronic

Answer key

  1. 1. respiratory acidosis
  2. 2. respiratory alkalosis
  3. 3. partially compensated
  4. 4. Osm = 338 mOsm/kg
  5. 5. AGc = 21.5 mmol/L
  6. 6. acute on chronic

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