The Portion of Delivered Oxygen Actually Consumed and an Index

Multiple Choice

The portion of delivered oxygen actually consumed and an index of the efficiency of circulation is the definition for the:

A) oxygenation index (OI) .
B) oxygen extraction ratio (C[a - v]O₂/CaO₂) .
C) arterial-mixed venous oxygen content difference (C[a - v]O₂) .
D) arterial-mixed venous oxygen saturation difference (S[a - v]O₂) .