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 s450 mLf = 10/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 10 times a minute with a tidal volume of 450 mL. Find the minute ventilation V̇E in L/min.

VT 450 mL10/min
V̇E = L/min
2.Easy
60 s710 mLf = 23/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 23 times a minute with a tidal volume of 710 mL. Find the minute ventilation V̇E in L/min.

VT 710 mL23/min
V̇E = L/min
3.Medium
2200psiHf = 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 2200 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.

2200 psif = 3.14 L/psi12 L/min200 psi
t = min
4.Medium
1550psiEf = 0.28 L/psi8 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size E oxygen cylinder (factor 0.28 L/psi) reads 1550 psi and runs at 8 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

1550 psif = 0.28 L/psi8 L/min200 psi
t = min
5.Hard
PaO₂ 16.4 kPa · FiO₂ 0.35 · PEEP 00100200300400500P/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 16.4 kPa on 35% oxygen by face mask, without PEEP or CPAP. Grade the ARDS severity with the Berlin definition. Click your answer.

PaO₂ 16.4 kPaFiO₂ 35%PEEP 0 cmH₂O
  1. 1above 300: no ARDS grade
  2. 2mild
  3. 3moderate
  4. 4severe
  5. 5not gradable: PEEP below 5
6.Hard
PaO₂ 17.6 kPa · FiO₂ 0.6 · 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 17.6 kPa on 60% oxygen with a PEEP of 15 cmH₂O. Grade the ARDS severity with the Berlin definition. Click your answer.

PaO₂ 17.6 kPaFiO₂ 60%PEEP 15 cmH₂O
  1. 1above 300: no ARDS grade
  2. 2mild
  3. 3moderate
  4. 4severe
  5. 5not gradable: PEEP below 5

Answer key

  1. 1. V̇E = 4.5 L/min
  2. 2. V̇E = 16.33 L/min
  3. 3. t = 523 min
  4. 4. t = 47 min
  5. 5. not gradable: PEEP below 5
  6. 6. mild

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