Oxygen therapy & respiratory calculations worksheet with answers

Free printable Oxygen therapy & respiratory calculations 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
60 s700 mLf = 8/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 8 times a minute with a tidal volume of 700 mL. Find the minute ventilation V̇E in L/min.

VT 700 mL8/min
V̇E = L/min
2.Easy
1500psiEf = 0.28 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size E oxygen cylinder reads 1500 psi. Its cylinder factor is 0.28 L/psi. How many litres V can be used before the safe residual of 200 psi is reached?

1500 psif = 0.28 L/psi200 psi
V = L
3.Medium
Hb99 g/LSaO₂96%PaO₂79 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 99 g/L, SaO₂ 96% and PaO₂ 79 mmHg (10.5 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 99 g/LSaO₂ 96%PaO₂ 79 mmHg (10.5 kPa)
CaO₂ = mL/dL
4.Medium
60 s640 mLf = 25/min · V̇A = ?VD​ = 150 mL

Practice exercise (made-up values, not clinical guidance). A patient breathes 25 times a minute with a tidal volume of 640 mL. The anatomical dead space is 150 mL. Find the alveolar ventilation V̇A in L/min.

VT 640 mL25/minVD 150 mL
V̇A = L/min
5.Hard
Hb110 g/LSaO₂97%PaO₂91 mmHgCaO₂mL/dL× CO3.4 L/minDO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 110 g/L, SaO₂ 97%, PaO₂ 91 mmHg (12.1 kPa) and a cardiac output of 3.4 L/min. With CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg), find the oxygen delivery DO₂ = CaO₂ × CO × 10 in mL/min.

Hb 110 g/LSaO₂ 97%PaO₂ 91 mmHg (12.1 kPa)CO 3.4 L/min
DO₂ = mL/min
6.Hard
129 kg192 cm♂4 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated man is 192 cm tall and weighs 129 kg. Lung-protective ventilation is set at 4 mL per kg of predicted body weight. Using PBW = 50 + 0.91 × (height cm − 152.4) kg, find the tidal volume VT to the nearest mL.

192 cm129 kg4 mL/kg
VT = mL

Answer key

  1. 1. V̇E = 5.6 L/min
  2. 2. V = 364 L
  3. 3. CaO₂ = 12.97 mL/dL
  4. 4. V̇A = 12.25 L/min
  5. 5. DO₂ = 495.4 mL/min
  6. 6. VT = 344 mL

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