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 s440 mLf = 20/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 20 times a minute with a tidal volume of 440 mL. Find the minute ventilation V̇E in L/min.

VT 440 mL20/min
V̇E = L/min
2.Easy
1950psiHf = 3.14 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size H oxygen cylinder reads 1950 psi. Its cylinder factor is 3.14 L/psi. How many litres V can be used before the safe residual of 200 psi is reached?

1950 psif = 3.14 L/psi200 psi
V = L
3.Medium
1800psiDf = 0.16 L/psi3 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size D oxygen cylinder (factor 0.16 L/psi) reads 1800 psi and runs at 3 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

1800 psif = 0.16 L/psi3 L/min200 psi
t = min
4.Medium
1650psiEf = 0.28 L/psi5 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size E oxygen cylinder (factor 0.28 L/psi) reads 1650 psi and runs at 5 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

1650 psif = 0.28 L/psi5 L/min200 psi
t = min
5.Hard
56 kg150 cm♀5 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated woman is 150 cm tall and weighs 56 kg. Lung-protective ventilation is set at 5 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.

150 cm56 kg5 mL/kg
VT = mL
6.Hard
1200psiDf = 0.16 L/psi30 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 30 minutes. The size D cylinder (factor 0.16 L/psi) reads 1200 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

30 min1200 psif = 0.16 L/psi200 psi
Q = L/min

Answer key

  1. 1. V̇E = 8.8 L/min
  2. 2. V = 5495 L
  3. 3. t = 85 min
  4. 4. t = 81 min
  5. 5. VT = 217 mL
  6. 6. Q = 5 L/min

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