A class I hemorrhage is a loss of what percent?

A class I hemorrhage is a loss of what percent?

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

Answer: (A)

This question tests how hemorrhage is categorized by the percent of total blood volume lost. Class I corresponds to up to about 15% of total blood volume lost. In an average adult, that’s roughly 750 mL. At this level, compensatory mechanisms keep blood pressure normal and most patients remain hemodynamically stable, with only mild anxiety or a slight tachycardia possible. As losses increase beyond 15%, signs of instability begin to appear, with progressively worse symptoms in higher classes. So the 0-15% range is the definition of Class I.

This question tests how hemorrhage is categorized by the percent of total blood volume lost. Class I corresponds to up to about 15% of total blood volume lost. In an average adult, that’s roughly 750 mL. At this level, compensatory mechanisms keep blood pressure normal and most patients remain hemodynamically stable, with only mild anxiety or a slight tachycardia possible. As losses increase beyond 15%, signs of instability begin to appear, with progressively worse symptoms in higher classes. So the 0-15% range is the definition of Class I.