According to ATLS, an adult has lost about 35% of blood volume. Which class of haemorrhagic shock is this?

Answer and explanation

Correct answer: B. Class III

  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: 35% blood loss fits Class III.
Answer
Class III.
Why not the others: 'Class I' does not match a loss of 35%; 'Class II' does not match a loss of 35%; 'Class IV' does not match a loss of 35%.

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