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 = 24/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 24 times a minute with a tidal volume of 640 mL. Find the minute ventilation V̇E in L/min.

VT 640 mL24/min
V̇E = L/min
2.Easy
0123456L/minFiO₂ ≈ ?21% + 4%·L/min

Practice exercise (made-up values, not clinical guidance). A patient receives oxygen by nasal cannula at 5 L/min. Using FiO₂ ≈ 21% + 4% per L/min, estimate the inspired oxygen FiO₂ in percent.

5 L/min
FiO₂ = %
3.Medium
1150psiEf = 0.28 L/psi10 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size E oxygen cylinder (factor 0.28 L/psi) reads 1150 psi and runs at 10 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

1150 psif = 0.28 L/psi10 L/min200 psi
t = min
4.Medium
Hb73 g/LSaO₂94%PaO₂71 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 73 g/L, SaO₂ 94% and PaO₂ 71 mmHg (9.5 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 73 g/LSaO₂ 94%PaO₂ 71 mmHg (9.5 kPa)
CaO₂ = mL/dL
5.Hard
Hb144 g/LSaO₂98%PaO₂103 mmHgCaO₂mL/dL× CO4.8 L/minDO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 144 g/L, SaO₂ 98%, PaO₂ 103 mmHg (13.7 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 144 g/LSaO₂ 98%PaO₂ 103 mmHg (13.7 kPa)CO 4.8 L/min
DO₂ = mL/min
6.Hard
Hb88 g/LSaO₂94%PaO₂72 mmHgCaO₂mL/dL× CO6.5 L/minDO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 88 g/L, SaO₂ 94%, PaO₂ 72 mmHg (9.6 kPa) and a cardiac output of 6.5 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 88 g/LSaO₂ 94%PaO₂ 72 mmHg (9.6 kPa)CO 6.5 L/min
DO₂ = mL/min

Answer key

  1. 1. V̇E = 15.36 L/min
  2. 2. FiO₂ = 41 %
  3. 3. t = 26 min
  4. 4. CaO₂ = 9.408 mL/dL
  5. 5. DO₂ = 922.5 mL/min
  6. 6. DO₂ = 734.5 mL/min

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