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 s630 mLf = 29/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 29 times a minute with a tidal volume of 630 mL. Find the minute ventilation V̇E in L/min.

VT 630 mL29/min
V̇E = L/min
2.Easy
60 s340 mLf = 17/min · V̇E = ?

Practice exercise (made-up values, not clinical guidance). A patient breathes 17 times a minute with a tidal volume of 340 mL. Find the minute ventilation V̇E in L/min.

VT 340 mL17/min
V̇E = L/min
3.Medium
60 s340 mLf = 13/min · V̇A = ?VD​ = 180 mL

Practice exercise (made-up values, not clinical guidance). A patient breathes 13 times a minute with a tidal volume of 340 mL. The anatomical dead space is 180 mL. Find the alveolar ventilation V̇A in L/min.

VT 340 mL13/minVD 180 mL
V̇A = L/min
4.Medium
1900psiHf = 3.14 L/psi6 L/minresidual 200 psit = ? min

Practice exercise (made-up values, not clinical guidance). A size H oxygen cylinder (factor 3.14 L/psi) reads 1900 psi and runs at 6 L/min. Keeping a safe residual of 200 psi, how many minutes t will it last? Round down to a whole minute.

1900 psif = 3.14 L/psi6 L/min200 psi
t = min
5.Hard
181 bar2 L10 L/min20 bart = ? min

Practice exercise (made-up values, not clinical guidance). A cylinder with a water capacity of 2 L is filled to 181 bar and runs at 10 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.

2 L181 bar10 L/min20 bar
t = min
6.Hard
90 bar10 L8 L/min20 bart = ? min

Practice exercise (made-up values, not clinical guidance). A cylinder with a water capacity of 10 L is filled to 90 bar and runs at 8 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.

10 L90 bar8 L/min20 bar
t = min

Answer key

  1. 1. V̇E = 18.27 L/min
  2. 2. V̇E = 5.78 L/min
  3. 3. V̇A = 2.08 L/min
  4. 4. t = 889 min
  5. 5. t = 32 min
  6. 6. t = 87 min

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