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 s430 mLf = 10/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 10 times a minute with a tidal volume of 430 mL. Find the minute ventilation V̇E in L/min.

VT 430 mL10/min
V̇E = L/min
2.Easy
1350psiHf = 3.14 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size H oxygen cylinder reads 1350 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?

1350 psif = 3.14 L/psi200 psi
V = L
3.Medium
PaO₂ 63 mmHg · FiO₂ 0.7 · PEEP 12 cmH₂O0100200300400500P/F (mmHg)above 300: no ARDS grademildmoderatesevere

Practice exercise (made-up values, not clinical guidance). A ventilated patient who meets the other Berlin criteria for ARDS has PaO₂ 63 mmHg (8.4 kPa) on 70% oxygen with a PEEP of 12 cmH₂O. Calculate the P/F ratio and click the ARDS severity.

PaO₂ 63 mmHg (8.4 kPa)FiO₂ 70%PEEP 12 cmH₂O
  1. 1above 300: no ARDS grade
  2. 2mild
  3. 3moderate
  4. 4severe
4.Medium
PaO₂ 60 mmHg · FiO₂ 0.9 · PEEP 8 cmH₂O0100200300400500P/F (mmHg)above 300: no ARDS grademildmoderatesevere

Practice exercise (made-up values, not clinical guidance). A ventilated patient who meets the other Berlin criteria for ARDS has PaO₂ 60 mmHg (8.0 kPa) on 90% oxygen with a PEEP of 8 cmH₂O. Calculate the P/F ratio and click the ARDS severity.

PaO₂ 60 mmHg (8.0 kPa)FiO₂ 90%PEEP 8 cmH₂O
  1. 1above 300: no ARDS grade
  2. 2mild
  3. 3moderate
  4. 4severe
5.Hard
PaO₂ 17.1 kPa · FiO₂ 0.6 · PEEP 5 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 17.1 kPa on 60% oxygen with a PEEP of 5 cmH₂O. Grade the ARDS severity with the Berlin definition. Click your answer.

PaO₂ 17.1 kPaFiO₂ 60%PEEP 5 cmH₂O
  1. 1above 300: no ARDS grade
  2. 2mild
  3. 3moderate
  4. 4severe
  5. 5not gradable: PEEP below 5
6.Hard
PaO₂ 14.4 kPa · FiO₂ 0.45 · PEEP 10 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 14.4 kPa on 45% oxygen with a PEEP of 10 cmH₂O. Grade the ARDS severity with the Berlin definition. Click your answer.

PaO₂ 14.4 kPaFiO₂ 45%PEEP 10 cmH₂O
  1. 1above 300: no ARDS grade
  2. 2mild
  3. 3moderate
  4. 4severe
  5. 5not gradable: PEEP below 5

Answer key

  1. 1. V̇E = 4.3 L/min
  2. 2. V = 3611 L
  3. 3. severe
  4. 4. severe
  5. 5. mild
  6. 6. mild

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