In terms of respiratory therapy, how does supplemental oxygen aid patients with COPD?

Supplemental oxygen is a crucial therapy for patients with chronic obstructive pulmonary disease (COPD) as it helps in reducing the work of breathing. In COPD, the airways are often narrowed and obstructed due to inflammation and mucus production, making it difficult for patients to breathe effectively. When oxygen levels in the blood are low (hypoxemia), the body has to work harder to achieve adequate oxygenation, leading to increased respiratory effort and fatigue.

By providing supplemental oxygen, patients can maintain adequate oxygen saturation levels without the need to exert excessive effort in breathing. This reduction in the work of breathing can improve overall comfort, decrease respiratory distress, and enhance the patient's ability to engage in daily activities. It does not alter blood pH directly, improve lung compliance, or increase airway resistance, as those effects would not be beneficial for COPD patients. Thus, the primary benefit of oxygen supplementation in these patients is the reduction of the work required to breathe effectively and maintain proper oxygenation.