In hemorrhage staging, Stage 4 corresponds to blood loss greater than what percent?

• A. 25%
• B. 35%
• C. 15%
• D. 5%

Answer: (B)

Stage 4 means severe blood loss, exceeding about 35% of total blood volume. In an average adult, that’s roughly 1.5 to 2 liters lost. At this level, the body can no longer compensate effectively, and perfusion to vital organs declines, leading to signs like rapid pulse, dropping blood pressure, confusion or lethargy, pale cool skin, and reduced urine output. The other percentages describe less severe stages of hemorrhage, so they don’t indicate the most critical level. Remember that 35% loss marks a shift toward unstable physiology and the need for rapid intervention and large-bore IV access with consideration of rapid fluid resuscitation and readiness for blood products.