Question

Which of the following is NOT a component of crush syndrome?

• A. Myoglobinuria
• B. Massive crushing of muscles
• C. Acute tubular necrosis
• D. Bleeding diathesis

Hint:

Crush syndrome is built around muscle breakdown, myoglobin release and kidney injury, not a bleeding disorder.

Answer 1

The Correct Option is D

Crush syndrome is the set of changes that follow long compression of a large muscle mass, as in earthquake or accident victims. We need the option that does not belong to this syndrome.

1. Myoglobinuria: crushed muscle releases myoglobin into the blood, which is then filtered into the urine. This is one of the classic markers checked for after a crush injury, so it is a genuine part of the syndrome.
2. Massive crushing of muscles: this is the injury that sets off the whole process, so by definition it belongs to the syndrome.
3. Acute tubular necrosis: the myoglobin that leaks out damages the kidney tubules, especially in a dehydrated or acidotic patient. This kidney injury is a well known and expected part of crush syndrome.
4. Bleeding diathesis: crush syndrome centers on muscle breakdown, myoglobin release, hyperkalemia and kidney failure. An abnormal bleeding tendency is not one of its defining features, so it does not fit here.

The finding that does not fit the syndrome is bleeding diathesis, so option 4 is the answer.

Let's summarize:

• Crush syndrome runs on three linked events: muscle crush, myoglobin release and tubular kidney injury.
• Bleeding diathesis is not part of this core picture.

The correct option is bleeding diathesis.