According to ATLS, an adult has lost about 20% of blood volume. Which class of haemorrhagic shock is this?

Answer and explanation

Correct answer: C. Class II

  1. Step 1: ATLS classes: I is up to 15%, II is 15-30%, III is 30-40% and IV is more than 40% blood loss.
  2. Step 2: 20% blood loss fits Class II.
Answer
Class II.
Why not the others: 'Class I' does not match a loss of 20%; 'Class III' does not match a loss of 20%; 'Class IV' does not match a loss of 20%.

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