A class IV hemorrhage is a loss of what percent?

A class IV hemorrhage is a loss of what percent?

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

Answer: (A)

A class IV hemorrhage is defined by loss of more than 40% of total blood volume. In an average adult, that’s roughly two liters or more of blood lost. This level of hemorrhage typically leads to decompensated shock with hypotension, tachycardia, altered mental status, and rapidly worsening condition, requiring immediate aggressive resuscitation with blood products. The other ranges correspond to less severe classes: 0-15% is class I, 15-30% is class II, and 30-40% is class III, not class IV.

A class IV hemorrhage is defined by loss of more than 40% of total blood volume. In an average adult, that’s roughly two liters or more of blood lost. This level of hemorrhage typically leads to decompensated shock with hypotension, tachycardia, altered mental status, and rapidly worsening condition, requiring immediate aggressive resuscitation with blood products. The other ranges correspond to less severe classes: 0-15% is class I, 15-30% is class II, and 30-40% is class III, not class IV.