What is the most common medical gas used for oxygen therapy?

Oxygen is the most common medical gas used for oxygen therapy because it is essential for the process of respiration and is critical in treating patients with respiratory conditions. Medical oxygen is supplied in concentrated forms to enhance the level of oxygen in a patient's bloodstream, which is particularly important for individuals suffering from conditions such as chronic obstructive pulmonary disease (COPD), pneumonia, or during emergency situations where oxygen levels may be dangerously low.

The purity and delivery method of medical oxygen allow healthcare providers to accurately control the dosage based on the patient's specific needs, making it a vital component in acute and chronic care settings. Its safety and effectiveness in promoting oxygenation highlight why it is the primary gas employed in therapeutic interventions for patients requiring supplemental oxygen.