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 s710 mLf = 18/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 18 times a minute with a tidal volume of 710 mL. Find the minute ventilation V̇E in L/min.

VT 710 mL18/min
V̇E = L/min
2.Easy
60 s520 mLf = 28/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 28 times a minute with a tidal volume of 520 mL. Find the minute ventilation V̇E in L/min.

VT 520 mL28/min
V̇E = L/min
3.Medium
1200psiDf = 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 1200 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.

1200 psif = 0.16 L/psi3 L/min200 psi
t = min
4.Medium
500psiEf = 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 500 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.

500 psif = 0.28 L/psi5 L/min200 psi
t = min
5.Hard
PaO₂ 7.7 kPa · FiO₂ 0.45 · PEEP 15 cmH₂O0100200300400500P/F (mmHg)above 300: no ARDS grademildmoderateseverenot gradable: PEEP below 5

Practice exercise (made-up values, not clinical guidance). A patient with acute hypoxaemia and bilateral opacities, not explained by heart failure, has PaO₂ 7.7 kPa on 45% oxygen with a PEEP of 15 cmH₂O. Grade the ARDS severity with the Berlin definition. Click your answer.

PaO₂ 7.7 kPaFiO₂ 45%PEEP 15 cmH₂O
  1. 1above 300: no ARDS grade
  2. 2mild
  3. 3moderate
  4. 4severe
  5. 5not gradable: PEEP below 5
6.Hard
114 kg181 cm♂6 mL/kg PBWVT​ = ? mL

Practice exercise (made-up values, not clinical guidance). A ventilated man is 181 cm tall and weighs 114 kg. Lung-protective ventilation is set at 6 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.

181 cm114 kg6 mL/kg
VT = mL

Answer key

  1. 1. V̇E = 12.78 L/min
  2. 2. V̇E = 14.56 L/min
  3. 3. t = 53 min
  4. 4. t = 16 min
  5. 5. moderate
  6. 6. VT = 456 mL

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