Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?
Correct answer: B. The absolute amount of reduced hemoglobin
- A. The relative proportion of reduced and oxygenated hemoglobin
- B. The absolute amount of reduced hemoglobin
- C. Thickness of the skin
- D. Fragility of capillaries
Explanation
Cyanosis becomes clinically apparent when the absolute amount of reduced haemoglobin rises to roughly 5 g/dL, rather than simply from a particular proportion of total haemoglobin. This is why cyanosis may be difficult to see in severe anaemia.
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