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 s640 mLf = 21/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 21 times a minute with a tidal volume of 640 mL. Find the minute ventilation V̇E in L/min.

VT 640 mL21/min
V̇E = L/min
2.Easy
550psiDf = 0.16 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size D oxygen cylinder reads 550 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?

550 psif = 0.16 L/psi200 psi
V = L
3.Medium
Hb164 g/LSaO₂90%PaO₂58 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 164 g/L, SaO₂ 90% and PaO₂ 58 mmHg (7.7 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 164 g/LSaO₂ 90%PaO₂ 58 mmHg (7.7 kPa)
CaO₂ = mL/dL
4.Medium
Hb95 g/LSaO₂97%PaO₂94 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 95 g/L, SaO₂ 97% and PaO₂ 94 mmHg (12.5 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 95 g/LSaO₂ 97%PaO₂ 94 mmHg (12.5 kPa)
CaO₂ = mL/dL
5.Hard
2000psiEf = 0.28 L/psi45 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 45 minutes. The size E cylinder (factor 0.28 L/psi) reads 2000 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

45 min2000 psif = 0.28 L/psi200 psi
Q = L/min
6.Hard
Hb134 g/LSaO₂95%PaO₂75 mmHgCaO₂mL/dL× CO4.8 L/minDO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 134 g/L, SaO₂ 95%, PaO₂ 75 mmHg (10.0 kPa) and a cardiac output of 4.8 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 134 g/LSaO₂ 95%PaO₂ 75 mmHg (10.0 kPa)CO 4.8 L/min
DO₂ = mL/min

Answer key

  1. 1. V̇E = 13.44 L/min
  2. 2. V = 56 L
  3. 3. CaO₂ = 19.95 mL/dL
  4. 4. CaO₂ = 12.63 mL/dL
  5. 5. Q = 11 L/min
  6. 6. DO₂ = 829.6 mL/min

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