Name a contraindication for oxygen therapy.

Oxygen therapy can significantly benefit patients with respiratory difficulties, but it is crucial to understand that there are specific contraindications where its use may be harmful or require careful consideration. One such contraindication is known oxygen toxicity or hypercapnia without physician's approval.

Oxygen toxicity can occur when a person is exposed to high levels of oxygen, leading to cellular damage. This condition typically arises from prolonged exposure to high concentrations of oxygen, particularly in patients with certain underlying health issues. Hypercapnia, or elevated levels of carbon dioxide in the blood, can also complicate oxygen therapy, especially for patients who rely on low levels of oxygen to stimulate their breathing drive. In these cases, administering oxygen without medical oversight might further exacerbate the patient’s condition, leading to dangerous complications such as respiratory failure.

Therefore, when patients exhibit known oxygen toxicity or hypercapnia, it is essential for healthcare providers to seek a physician's approval before administering oxygen therapy. This ensures that therapy is tailored to the patient’s specific needs and conditions, minimizing risks and maximizing therapeutic benefits.