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 s600 mLf = 21/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 21 times a minute with a tidal volume of 600 mL. Find the minute ventilation V̇E in L/min.

VT 600 mL21/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 3 L/min. Using FiO₂ ≈ 21% + 4% per L/min, estimate the inspired oxygen FiO₂ in percent.

3 L/min
FiO₂ = %
3.Medium
650psiHf = 3.14 L/psi12 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size H oxygen cylinder (factor 3.14 L/psi) reads 650 psi and runs at 12 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

650 psif = 3.14 L/psi12 L/min200 psi
t = min
4.Medium
1850psiHf = 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 1850 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.

1850 psif = 3.14 L/psi6 L/min200 psi
t = min
5.Hard
132 kg183 cm♂4 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated man is 183 cm tall and weighs 132 kg. Lung-protective ventilation is set at 4 mL per kg of predicted body weight. Using PBW = 50 + 0.91 × (height cm − 152.4) kg, find the tidal volume VT to the nearest mL.

183 cm132 kg4 mL/kg
VT = mL
6.Hard
750psiDf = 0.16 L/psi45 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 45 minutes. The size D cylinder (factor 0.16 L/psi) reads 750 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 min750 psif = 0.16 L/psi200 psi
Q = L/min

Answer key

  1. 1. V̇E = 12.6 L/min
  2. 2. FiO₂ = 33 %
  3. 3. t = 117 min
  4. 4. t = 863 min
  5. 5. VT = 311 mL
  6. 6. Q = 1 L/min

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