What is hypovolemia?

• A. An increased blood volume condition
• B. A loss of blood volume that can occur as a result of impacts and injuries to the body as a structure collapses
• C. A rapid heart rate
• D. A chronic low blood volume state

Answer: (B)

Hypovolemia is a decrease in circulating blood volume, which reduces preload and perfusion to tissues. In a structural collapse, this can happen from crush injuries and bleeding where blood is lost externally or internally. The option that describes a loss of blood volume resulting from injuries during a collapse captures this acute trauma scenario and is the best fit. An increased blood volume describes the opposite condition, a rapid heart rate is a sign or response rather than the definition, and a chronic low blood volume state refers to a long-standing issue, not an acute loss during a collapse. In practice, recognizing hypovolemia is critical for prioritizing hemorrhage control and rapid transport.