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
pH7.357.457.64PaCO₂mmHg354523HCO₃⁻mmol/L222624respiratorymetabolicacidosisalkalosis

A practice arterial blood gas shows pH 7.64, PaCO₂ 23 mmHg (3.1 kPa) and HCO₃⁻ 24 mmol/L. Which primary disorder is it? Click the cell in the grid.

pH 7.64PaCO₂ 23 mmHg (3.1 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 91 mmHg (12.1 kPa) while the inspired oxygen is 60%. Calculate the ratio P/F = PaO₂/FiO₂ in mmHg.

PaO₂ 91 mmHg (12.1 kPa)FiO₂ 60%
P/F = mmHg
3.Medium
pH7.357.457.58PaCO₂mmHg354522HCO₃⁻mmol/L222620uncompensatedpartially compensatedfully compensated

A practice arterial blood gas shows pH 7.58, PaCO₂ 22 mmHg (2.9 kPa) and HCO₃⁻ 20 mmol/L. The primary disorder is respiratory alkalosis. How far is it compensated? Click your answer.

pH 7.58PaCO₂ 22 mmHg (2.9 kPa)HCO₃⁻ 20 mmol/L
  1. 1uncompensated
  2. 2partially compensated
  3. 3fully compensated
4.Medium

Practice values: Na⁺ 138 mmol/L, glucose 5.7 mmol/L and urea 22.2 mmol/L. Calculate the serum osmolality Osm = 2·Na⁺ + glucose + urea to the nearest whole number.

Na⁺ 138 mmol/Lglucose 5.7 mmol/Lurea 22.2 mmol/L
Osm = mOsm/kg
5.Hard

Practice values: Na⁺ 144, Cl⁻ 111, HCO₃⁻ 18 mmol/L and albumin 16 g/L. Find the albumin-corrected anion gap AGc = AG + 0.25·(40 − albumin).

Na⁺ 144 mmol/LCl⁻ 111 mmol/LHCO₃⁻ 18 mmol/Lalbumin 16 g/L
AGc = mmol/L
6.Hard
pH7.357.457.24PaCO₂mmHg354524HCO₃⁻mmol/L222610added normal-gap acidosispure high-gap acidosisadded metabolic alkalosis

A practice gas shows pH 7.24, PaCO₂ 24 mmHg (3.2 kPa) and HCO₃⁻ 10 mmol/L, with Na⁺ 141 and Cl⁻ 101 mmol/L. Use the anion gap and the delta ratio to click the best interpretation.

pH 7.24PaCO₂ 24 mmHg (3.2 kPa)HCO₃⁻ 10 mmol/LNa⁺ 141 mmol/LCl⁻ 101 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 = 151.7 mmHg
  3. 3. partially compensated
  4. 4. Osm = 304 mOsm/kg
  5. 5. AGc = 21 mmol/L
  6. 6. pure high-gap acidosis

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