What symptoms might indicate a worker has 30-40% carboxyhemoglobin in their blood?

The presence of 30-40% carboxyhemoglobin in a worker's blood can lead to significant impairment of oxygen transport within the body due to the binding of carbon monoxide to hemoglobin. This level is serious and can produce specific neurological symptoms, as the brain and other organs become deprived of adequate oxygen.

Headache, dizziness, and confusion are among the common symptoms associated with carbon monoxide poisoning. The headache may result from the brain's response to reduced oxygen levels, while dizziness and confusion often stem from the effects of hypoxia on cognitive functions. As carboxyhemoglobin levels rise, these neurological symptoms can intensify, making them critical indicators for recognizing potential carbon monoxide exposure.

In contrast, the other options do not align with the physiological responses typically observed with elevated carboxyhemoglobin levels. High blood pressure and fatigue may not specifically indicate carbon monoxide exposure, and increased appetite and energy, as well as blurred vision and euphoria, do not characterize the toxicological effects of carbon monoxide. Thus, identifying the correct symptoms is fundamental for potential intervention and treatment in occupational settings where carbon monoxide exposure is a risk.