What is the best method for administering oxygen to a patient with COPD?

In the context of a patient with Chronic Obstructive Pulmonary Disease (COPD), administering oxygen should be done with caution to avoid complications. Low-flow oxygen via nasal cannula is the best method for these patients because it allows for more controlled delivery of oxygen. Patients with COPD often have adapted to lower levels of oxygen in their blood, and administering high concentrations of oxygen can lead to the suppression of their respiratory drive.

Using a nasal cannula allows for a lower concentration of oxygen, which is ideal since these patients may retain carbon dioxide and their respiratory drive is often stimulated by low oxygen levels rather than high carbon dioxide levels. This method helps maintain adequate oxygen saturation while minimizing the risk of hyperoxia and respiratory depression.

In contrast, high-flow oxygen via mask can deliver excessive oxygen and may lead to complications in a COPD patient. The other options, such as no oxygen or oxygen only when requested, do not address the potential need for oxygen support based on the patient's specific condition and oxygen saturation levels. Thus, using low-flow oxygen via nasal cannula strikes the best balance between ensuring adequate oxygenation and avoiding adverse effects.