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
750psiDf = 0.16 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size D oxygen cylinder reads 750 psi. Its cylinder factor is 0.16 L/psi. How many litres V can be used before the safe residual of 200 psi is reached?

750 psif = 0.16 L/psi200 psi
V = L
2.Easy
60 s330 mLf = 15/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 15 times a minute with a tidal volume of 330 mL. Find the minute ventilation V̇E in L/min.

VT 330 mL15/min
V̇E = L/min
3.Medium
Hb116 g/LSaO₂95%PaO₂76 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 116 g/L, SaO₂ 95% and PaO₂ 76 mmHg (10.1 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 116 g/LSaO₂ 95%PaO₂ 76 mmHg (10.1 kPa)
CaO₂ = mL/dL
4.Medium
1200psiEf = 0.28 L/psi3 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size E oxygen cylinder (factor 0.28 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 = 0.28 L/psi3 L/min200 psi
t = min
5.Hard
1250psiEf = 0.28 L/psi40 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 40 minutes. The size E cylinder (factor 0.28 L/psi) reads 1250 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

40 min1250 psif = 0.28 L/psi200 psi
Q = L/min
6.Hard
2100psiDf = 0.16 L/psi20 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 20 minutes. The size D cylinder (factor 0.16 L/psi) reads 2100 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

20 min2100 psif = 0.16 L/psi200 psi
Q = L/min

Answer key

  1. 1. V = 88 L
  2. 2. V̇E = 4.95 L/min
  3. 3. CaO₂ = 14.99 mL/dL
  4. 4. t = 93 min
  5. 5. Q = 7 L/min
  6. 6. Q = 15 L/min

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