Certified Pediatric Nurse (CPN)

Which of the following is a late sign of carbon monoxide poisoning?

1. Dull headache

2. Dizziness

3. Chest pain

4. Weakness

The correct answer is: Chest pain

Chest pain is considered a late sign of carbon monoxide poisoning because it often indicates that the body is experiencing significant stress due to the lack of oxygen. During early stages of carbon monoxide exposure, symptoms are more nonspecific and can include mild headache, dizziness, and weakness as the body begins to respond to the hypoxic condition. However, as the poisoning progresses, it can lead to more severe physiological effects, which may manifest as chest pain. This is particularly concerning because it suggests that vital organs, such as the heart, may be struggling due to inadequate oxygen delivery. Recognizing chest pain as a late sign alerts healthcare providers to a more serious state of poisoning, requiring immediate medical intervention to prevent further complications.