Which statement best describes the relationship between shock and tissue oxygenation?

Which statement best describes the relationship between shock and tissue oxygenation?

• A. Shock causes inadequate tissue perfusion and oxygenation
• B. Shock increases tissue oxygen delivery
• C. Shock has no effect on tissue oxygenation
• D. Shock improves oxygen extraction

Answer: (A)

Shock is a state of inadequate tissue perfusion, meaning the blood flow delivering oxygen to tissues falls short of what tissues need. When perfusion drops, oxygen delivery to cells (DO2) decreases because cardiac output, blood volume, or oxygen content of the blood is compromised. With insufficient delivery, tissues can’t meet their metabolic demands, leading to tissue hypoxia and a shift toward anaerobic metabolism. The body may increase oxygen extraction temporarily, but this compensatory mechanism cannot fully restore oxygenation, and overall tissue oxygenation remains inadequate. Thus, the best description is that shock causes inadequate tissue perfusion and oxygenation.

Shock is a state of inadequate tissue perfusion, meaning the blood flow delivering oxygen to tissues falls short of what tissues need. When perfusion drops, oxygen delivery to cells (DO2) decreases because cardiac output, blood volume, or oxygen content of the blood is compromised. With insufficient delivery, tissues can’t meet their metabolic demands, leading to tissue hypoxia and a shift toward anaerobic metabolism. The body may increase oxygen extraction temporarily, but this compensatory mechanism cannot fully restore oxygenation, and overall tissue oxygenation remains inadequate. Thus, the best description is that shock causes inadequate tissue perfusion and oxygenation.