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 s450 mLf = 28/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 28 times a minute with a tidal volume of 450 mL. Find the minute ventilation V̇E in L/min.

VT 450 mL28/min
V̇E = L/min
2.Easy
750psiDf = 0.16 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size D oxygen cylinder reads 750 psi. Its cylinder factor is 0.16 L/psi. How many litres V can be used before the safe residual of 200 psi is reached?

750 psif = 0.16 L/psi200 psi
V = L
3.Medium
60 s470 mLf = 19/min · V̇A = ?VD​ = 180 mL

Practice exercise (made-up values, not clinical guidance). A patient breathes 19 times a minute with a tidal volume of 470 mL. The anatomical dead space is 180 mL. Find the alveolar ventilation V̇A in L/min.

VT 470 mL19/minVD 180 mL
V̇A = L/min
4.Medium
Hb170 g/LSaO₂96%PaO₂80 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 170 g/L, SaO₂ 96% and PaO₂ 80 mmHg (10.7 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 170 g/LSaO₂ 96%PaO₂ 80 mmHg (10.7 kPa)
CaO₂ = mL/dL
5.Hard
1300psiEf = 0.28 L/psi60 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 60 minutes. The size E cylinder (factor 0.28 L/psi) reads 1300 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

60 min1300 psif = 0.28 L/psi200 psi
Q = L/min
6.Hard
750psiEf = 0.28 L/psi30 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 30 minutes. The size E cylinder (factor 0.28 L/psi) reads 750 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

30 min750 psif = 0.28 L/psi200 psi
Q = L/min

Answer key

  1. 1. V̇E = 12.6 L/min
  2. 2. V = 88 L
  3. 3. V̇A = 5.51 L/min
  4. 4. CaO₂ = 22.11 mL/dL
  5. 5. Q = 5 L/min
  6. 6. Q = 5 L/min

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