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
1500psiDf = 0.16 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size D oxygen cylinder reads 1500 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?

1500 psif = 0.16 L/psi200 psi
V = L
2.Easy
1150psiHf = 3.14 L/psiresidual 200 psiV = ? L

Practice exercise (made-up values, not clinical guidance). The gauge on a size H oxygen cylinder reads 1150 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?

1150 psif = 3.14 L/psi200 psi
V = L
3.Medium
Hb83 g/LSaO₂98%PaO₂107 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 83 g/L, SaO₂ 98% and PaO₂ 107 mmHg (14.3 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 83 g/LSaO₂ 98%PaO₂ 107 mmHg (14.3 kPa)
CaO₂ = mL/dL
4.Medium
Hb166 g/LSaO₂96%PaO₂84 mmHgCaO₂?

Practice exercise (made-up values, not clinical guidance). A patient has Hb 166 g/L, SaO₂ 96% and PaO₂ 84 mmHg (11.2 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.

Hb 166 g/LSaO₂ 96%PaO₂ 84 mmHg (11.2 kPa)
CaO₂ = mL/dL
5.Hard
1550psiEf = 0.28 L/psi60 minresidual 200 psiQ = ? L/min

Practice exercise (made-up values, not clinical guidance). A transfer will take 60 minutes. The size E cylinder (factor 0.28 L/psi) reads 1550 psi. Keeping a safe residual of 200 psi, what is the highest whole-number flow Q in L/min that lasts the whole transfer?

60 min1550 psif = 0.28 L/psi200 psi
Q = L/min
6.Hard
169 bar3 L15 L/min20 bart = ? min

Practice exercise (made-up values, not clinical guidance). A cylinder with a water capacity of 3 L is filled to 169 bar and runs at 15 L/min. The gas volume is about the water capacity × the pressure. In this exercise the cylinder is changed at 20 bar. How many minutes t until it must be changed? Round down to a whole minute.

3 L169 bar15 L/min20 bar
t = min

Answer key

  1. 1. V = 208 L
  2. 2. V = 2983 L
  3. 3. CaO₂ = 11.22 mL/dL
  4. 4. CaO₂ = 21.61 mL/dL
  5. 5. Q = 6 L/min
  6. 6. t = 29 min

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