What is the correct response if an adult patient presents with respiratory distress after a known asthma attack?

Administering supplemental oxygen is the appropriate response for an adult patient experiencing respiratory distress after an asthma attack because oxygen therapy can help alleviate hypoxia, a common complicating factor in asthma exacerbations. Asthma causes bronchoconstriction and inflammation, which can hinder airflow and reduce oxygen delivery to the tissues. By providing supplemental oxygen, you increase the amount of oxygen available for the patient, improving their overall oxygen saturation levels and potentially enhancing their ability to breathe more easily.

In an acute asthma attack, respiratory distress can lead to low oxygen levels in the blood, and administering oxygen helps to counter this effect. Additionally, maintaining adequate oxygenation is crucial to prevent further complications such as respiratory failure.

While other actions, such as transporting the patient upright, might provide some relief by aiding breathing mechanics, and checking blood pressure is important for monitoring the patient's overall status, neither of these directly addresses the immediate need for oxygen delivery. Encouraging deep breaths can also be counterproductive during an acute episode, as this may cause further distress or hyperventilation. Therefore, supplemental oxygen is the most critical action to take in this scenario.