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 s390 mLf = 11/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 11 times a minute with a tidal volume of 390 mL. Find the minute ventilation V̇E in L/min.

VT 390 mL11/min
V̇E = L/min
2.Easy
60 s370 mLf = 20/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 20 times a minute with a tidal volume of 370 mL. Find the minute ventilation V̇E in L/min.

VT 370 mL20/min
V̇E = L/min
3.Medium
Hb85 g/LSaO₂95%PaO₂75 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 85 g/L, SaO₂ 95% and PaO₂ 75 mmHg (10.0 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 85 g/LSaO₂ 95%PaO₂ 75 mmHg (10.0 kPa)
CaO₂ = mL/dL
4.Medium
Hb137 g/LSaO₂86%PaO₂51 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 137 g/L, SaO₂ 86% and PaO₂ 51 mmHg (6.8 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 137 g/LSaO₂ 86%PaO₂ 51 mmHg (6.8 kPa)
CaO₂ = mL/dL
5.Hard
1650psiEf = 0.28 L/psi120 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 120 minutes. The size E cylinder (factor 0.28 L/psi) reads 1650 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

120 min1650 psif = 0.28 L/psi200 psi
Q = L/min
6.Hard
Hb125 g/LSaO₂97%PaO₂94 mmHgCaO₂mL/dL× CO5.8 L/minDO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 125 g/L, SaO₂ 97%, PaO₂ 94 mmHg (12.5 kPa) and a cardiac output of 5.8 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 125 g/LSaO₂ 97%PaO₂ 94 mmHg (12.5 kPa)CO 5.8 L/min
DO₂ = mL/min

Answer key

  1. 1. V̇E = 4.29 L/min
  2. 2. V̇E = 7.4 L/min
  3. 3. CaO₂ = 11.05 mL/dL
  4. 4. CaO₂ = 15.94 mL/dL
  5. 5. Q = 3 L/min
  6. 6. DO₂ = 958.7 mL/min

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