After a suspected carbon monoxide exposure, when is medical evaluation warranted?

• A. Only if symptoms worsen
• B. If symptoms persist or if there are concerning signs, seek medical evaluation
• C. Only when oxygen is depleted
• D. Never needed if you feel fine

Answer: (B)

Recognize when to seek medical evaluation after suspected carbon monoxide exposure. Carbon monoxide binds to hemoglobin, forming carboxyhemoglobin, which impairs oxygen delivery to tissues. Because symptoms can be mild, nonspecific, or even delayed, you shouldn’t wait for noticeable worsening to act. Medical evaluation is warranted if symptoms persist or if there are concerning signs such as headache, dizziness, nausea, confusion, chest pain, shortness of breath, fainting, or any signs of altered mental status. Even if you feel fine initially, exposure can cause injury and requires assessment, especially in high-risk individuals like young children, pregnant individuals, or people with heart or lung disease. In a clinical setting, treatment may include 100% oxygen right away and, in severe cases, hyperbaric oxygen therapy after evaluating carboxyhemoglobin levels and symptoms. So the best course is to seek medical evaluation if symptoms persist or there are concerning signs.