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After oxygenation of blood, what is the percentage of oxygen carried by hemoglobin?

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After oxygenation of blood, what is the percentage of oxygen carried by hemoglobin?

(a) 70 %

(b) 75 %

(c) 87 %

(d) 97 %

This question was addressed to me during an online exam.

My question is based upon Laws of Gases, Uptake of Anaesthetic Gases and Vapours, Patient Monitoring During Surgery in chapter Anaesthesia of Clinical Science

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Right choice is (d) 97 %

The explanation: After oxygenation, the partial pressure of oxygen increases. At this point, arterial blood has 0.29 ml oxygen in 5 ml of blood and veins have 0.12 ml of oxygen in 5 ml of blood. This way, we find that 3% oxygen is carried dissolved in the blood and 97% in a hemoglobin.

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