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 s570 mLf = 14/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 14 times a minute with a tidal volume of 570 mL. Find the minute ventilation V̇E in L/min.

VT 570 mL14/min
V̇E = L/min
2.Easy
1650psiEf = 0.28 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size E oxygen cylinder reads 1650 psi. Its cylinder factor is 0.28 L/psi. How many litres V can be used before the safe residual of 200 psi is reached?

1650 psif = 0.28 L/psi200 psi
V = L
3.Medium
2200psiEf = 0.28 L/psi6 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size E oxygen cylinder (factor 0.28 L/psi) reads 2200 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.

2200 psif = 0.28 L/psi6 L/min200 psi
t = min
4.Medium
Hb147 g/LSaO₂95%PaO₂76 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 147 g/L, SaO₂ 95% and PaO₂ 76 mmHg (10.1 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 147 g/LSaO₂ 95%PaO₂ 76 mmHg (10.1 kPa)
CaO₂ = mL/dL
5.Hard
63 kg163 cm♀6 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated woman is 163 cm tall and weighs 63 kg. Lung-protective ventilation is set at 6 mL per kg of predicted body weight. Using PBW = 45.5 + 0.91 × (height cm − 152.4) kg, find the tidal volume VT to the nearest mL.

163 cm63 kg6 mL/kg
VT = mL
6.Hard
79 kg178 cm♀6 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated woman is 178 cm tall and weighs 79 kg. Lung-protective ventilation is set at 6 mL per kg of predicted body weight. Using PBW = 45.5 + 0.91 × (height cm − 152.4) kg, find the tidal volume VT to the nearest mL.

178 cm79 kg6 mL/kg
VT = mL

Answer key

  1. 1. V̇E = 7.98 L/min
  2. 2. V = 406 L
  3. 3. t = 93 min
  4. 4. CaO₂ = 18.94 mL/dL
  5. 5. VT = 331 mL
  6. 6. VT = 413 mL

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