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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Name: ____________________   Date: ____________

1.Easy
60 s490 mLf = 31/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 31 times a minute with a tidal volume of 490 mL. Find the minute ventilation V̇E in L/min.

VT 490 mL31/min
V̇E = L/min
2.Easy
850psiEf = 0.28 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size E oxygen cylinder reads 850 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?

850 psif = 0.28 L/psi200 psi
V = L
3.Medium
60 s650 mLf = 12/min · V̇A = ?VD​ = 180 mL

Practice exercise (made-up values, not clinical guidance). A patient breathes 12 times a minute with a tidal volume of 650 mL. The anatomical dead space is 180 mL. Find the alveolar ventilation V̇A in L/min.

VT 650 mL12/minVD 180 mL
V̇A = L/min
4.Medium
500psiHf = 3.14 L/psi15 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size H oxygen cylinder (factor 3.14 L/psi) reads 500 psi and runs at 15 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

500 psif = 3.14 L/psi15 L/min200 psi
t = min
5.Hard
76 kg167 cm♀4 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated woman is 167 cm tall and weighs 76 kg. Lung-protective ventilation is set at 4 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.

167 cm76 kg4 mL/kg
VT = mL
6.Hard
82 kg167 cm♂4 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated man is 167 cm tall and weighs 82 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.

167 cm82 kg4 mL/kg
VT = mL

Answer key

  1. 1. V̇E = 15.19 L/min
  2. 2. V = 182 L
  3. 3. V̇A = 5.64 L/min
  4. 4. t = 62 min
  5. 5. VT = 235 mL
  6. 6. VT = 253 mL

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