A class III hemorrhage is a loss of what percent?

A class III hemorrhage is a loss of what percent?

• A. 30-40%
• B. 15-30%
• C. >40%
• D. 0-15%

Answer: (A)

Hemorrhage severity is categorized by the percent of total blood volume lost. Class III corresponds to about 30-40% loss. In an average adult with roughly 5 liters of blood, this is around 1.5–2 liters lost. At this stage the body’s compensatory mechanisms kick in—heart rate rises, peripheral vasoconstriction occurs, and breathing may quicken—so blood pressure can remain normal early on, but signs such as a narrowing pulse pressure, mental status changes, and reduced urine output start to appear. The other ranges are milder or more severe: 0-15% is mild loss with minimal signs, 15-30% is moderate, and more than 40% is severe shock with significant hypotension and end-organ hypoperfusion.

Hemorrhage severity is categorized by the percent of total blood volume lost. Class III corresponds to about 30-40% loss. In an average adult with roughly 5 liters of blood, this is around 1.5–2 liters lost. At this stage the body’s compensatory mechanisms kick in—heart rate rises, peripheral vasoconstriction occurs, and breathing may quicken—so blood pressure can remain normal early on, but signs such as a narrowing pulse pressure, mental status changes, and reduced urine output start to appear. The other ranges are milder or more severe: 0-15% is mild loss with minimal signs, 15-30% is moderate, and more than 40% is severe shock with significant hypotension and end-organ hypoperfusion.