Medical MCQ-One intern calculated the concentration of O2 in blood as 0.0025 ml/ml of blood. Considering atmospheric pressure as 760mmHg, how much approximate O2 tension could have been in the blood?

40 mmHg

60 mmHg

80 mmHg

100 mmhg

Question Category:

Correct Answer:

80 mmHg

Description:

For PO2 to be 100mmHg, the dissolved O2 level has to be around 0.30ml/dL of blood. So when the O2 level is 0.25ml/dL, the PO2 is around 80mmHg.

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