An oximizer is a medical device used to enhance the delivery of supplemental oxygen to patients with respiratory conditions. It typically consists of a nasal cannula or mask that incorporates features to increase the efficiency of oxygen usage, such as conserving oxygen during exhalation. This device improves patient comfort and can help reduce the overall amount of oxygen needed, making it beneficial for long-term oxygen therapy. Oximizers are often used in home care settings for individuals with chronic lung diseases.