Practice exercise (made-up values, not clinical guidance). The gauge on a size H oxygen cylinder reads 1650 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?
Practice exercise (made-up values, not clinical guidance). The gauge on a size D oxygen cylinder reads 2000 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?
Practice exercise (made-up values, not clinical guidance). A patient has Hb 83 g/L, SaO₂ 97% and PaO₂ 88 mmHg (11.7 kPa). Find the arterial oxygen content CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg) in mL O₂/dL.
Practice exercise (made-up values, not clinical guidance). A size E oxygen cylinder (factor 0.28 L/psi) reads 950 psi and runs at 8 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 patient has Hb 107 g/L, SaO₂ 89%, PaO₂ 56 mmHg (7.5 kPa) and a cardiac output of 6.2 L/min. With CaO₂ = 1.34 × Hb (g/dL) × SaO₂ + 0.003 × PaO₂ (mmHg), find the oxygen delivery DO₂ = CaO₂ × CO × 10 in mL/min.
Practice exercise (made-up values, not clinical guidance). A patient on high-flow nasal oxygen has SpO₂ 90% on FiO₂ 0.8 and a respiratory rate of 33/min. Find the ROX index ROX = (SpO₂/FiO₂)/RR, with SpO₂ in percent and FiO₂ as a fraction. Round to two decimal places.
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