What is the mental state of a casualty that has lost 2000cc of blood?

A casualty who has lost 2000cc of blood is likely to be confused or lethargic due to hypovolemic shock, which is a direct consequence of significant blood loss. When the body loses a substantial volume of blood, it cannot maintain adequate perfusion to the vital organs, resulting in a decrease in oxygen delivery. This can lead to altered mental status, where the individual may not be fully aware of their surroundings or may exhibit signs of confusion and decreased responsiveness.

In this state, the body is under stress from inadequate blood flow, which can impact cognitive functions and lead to a lethargic appearance as the body attempts to stabilize itself. The decrease in blood volume affects the brain's ability to function optimally, contributing to the confusion observed in such cases. Thus, the mental state of a casualty with a significant loss of blood aligns with these characteristics.