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 s630 mLf = 27/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 27 times a minute with a tidal volume of 630 mL. Find the minute ventilation V̇E in L/min.

VT 630 mL27/min
V̇E = L/min
2.Easy
60 s300 mLf = 30/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 30 times a minute with a tidal volume of 300 mL. Find the minute ventilation V̇E in L/min.

VT 300 mL30/min
V̇E = L/min
3.Medium
900psiHf = 3.14 L/psi6 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size H oxygen cylinder (factor 3.14 L/psi) reads 900 psi and runs at 6 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

900 psif = 3.14 L/psi6 L/min200 psi
t = min
4.Medium
Hb98 g/LSaO₂96%PaO₂80 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 98 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 98 g/LSaO₂ 96%PaO₂ 80 mmHg (10.7 kPa)
CaO₂ = mL/dL
5.Hard
900psiEf = 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 900 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 min900 psif = 0.28 L/psi200 psi
Q = L/min
6.Hard
Hb101 g/LSaO₂96%PaO₂79 mmHgCaO₂mL/dL× CO3.2 L/minDO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 101 g/L, SaO₂ 96%, PaO₂ 79 mmHg (10.5 kPa) and a cardiac output of 3.2 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 101 g/LSaO₂ 96%PaO₂ 79 mmHg (10.5 kPa)CO 3.2 L/min
DO₂ = mL/min

Answer key

  1. 1. V̇E = 17.01 L/min
  2. 2. V̇E = 9 L/min
  3. 3. t = 366 min
  4. 4. CaO₂ = 12.85 mL/dL
  5. 5. Q = 3 L/min
  6. 6. DO₂ = 423.3 mL/min

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