A contraindication for hyperbaric oxygen therapy includes which of the following?

Certain respiratory illnesses serve as a contraindication for hyperbaric oxygen therapy due to the potential for increased pressure to exacerbate existing conditions. For example, conditions such as chronic obstructive pulmonary disease (COPD) or pneumothorax can be significantly worsened by the high-pressure environment of a hyperbaric chamber. In these instances, the increased oxygen levels and pressure can lead to complications like barotrauma or an increase in airway resistance, which can be dangerous for patients with compromised pulmonary functions.

In contrast, stable asthma typically does not pose the same level of risk, as long as the condition is well-managed and the patient is not experiencing an acute exacerbation. Although severe anxiety can complicate the treatment process, it is not necessarily a strict contraindication as management strategies can be employed to help patients cope. Mild hypertension generally does not hinder the safety or effectiveness of hyperbaric therapy, assuming it is under control.