Which of the following levels of PO₂ is associated with a significant oxygen content gain?

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The oxygen-hemoglobin equilibrium curve is quite steep in the 40-60 mm Hg range, whereas it is almost flat above 100 mm Hg. A PO₂ change from 40 to 60 mm Hg represents a 15% hemoglobin saturation or oxygen content gain (from 75% to 90%). A change in PO₂ from 100 to 600 mm Hg represents an oxygen saturation and content gain of only 2.5% (from 97.5% to 100%). The additional dissolved oxygen generated by a PO₂ change from 100 to 600 mm Hg is only 1.5 mL/dL (500 mm Hg x 0.003), not enough to outweigh the oxygen content gain accompanying a 40 to 60 mm Hg PO₂ change.

Which of the Following Levels of PO2 Is Associated with a Significant

Which of the Following Levels of PO₂ Is Associated with a Significant