What should be evaluated first in a patient with potential toxic exposure?

In a patient with potential toxic exposure, the first priority is to evaluate airway patency. This is crucial because an obstructed airway can lead to asphyxiation, inadequate oxygenation, and ultimately respiratory failure. Toxic substances, particularly those that are inhaled or ingested, can cause swelling, spasm, or decreased responsiveness, which may compromise the patient's ability to maintain an open airway.

By establishing whether the airway is patent, healthcare providers can take necessary measures such as positioning the patient or employing advanced airway techniques if needed. Once airway patency is assessed, other vital signs such as breathing pattern and heart rate can be evaluated to further determine the patient's respiratory status and cardiovascular function, followed by an assessment of neurological status. However, ensuring an open airway is universally recognized as the top priority in any emergency situation, especially in the context of potential toxic exposure.