Practice exercise (made-up values, not clinical guidance). The gauge on a size E oxygen cylinder reads 1550 psi. Its cylinder factor is 0.28 L/psi. How many litres V can be used before the safe residual of 200 psi is reached?
Practice exercise (made-up values, not clinical guidance). A patient breathes 27 times a minute with a tidal volume of 640 mL. Find the minute ventilation V̇E in L/min.
Practice exercise (made-up values, not clinical guidance). A patient breathes 25 times a minute with a tidal volume of 370 mL. The anatomical dead space is 150 mL. Find the alveolar ventilation V̇A in L/min.
Practice exercise (made-up values, not clinical guidance). A size H oxygen cylinder (factor 3.14 L/psi) reads 1000 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.
Practice exercise (made-up values, not clinical guidance). A cylinder with a water capacity of 2 L is filled to 122 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.
Practice exercise (made-up values, not clinical guidance). A patient with acute hypoxaemia and bilateral opacities, not explained by heart failure, has PaO₂ 14.1 kPa on 70% oxygen with a PEEP of 15 cmH₂O. Grade the ARDS severity with the Berlin definition. Click your answer.
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