A 34-year-old woman has had 8 months of heavy menstrual bleeding. She is breathless climbing one flight of stairs and tired all day. Her conjunctivae are pale. Respiratory rate is 14/min, pulse 96/min and blood pressure 112/70 mmHg. The chest is clear and the heart sounds are normal. Haemoglobin is 61 g/L. She is breathing room air.
Which one of the following combinations of arterial oxygen tension, haemoglobin oxygen saturation and arterial oxygen content would you expect in this woman at rest?
Keep going — a set of ten like this one, one at a time.
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