Oxygen delivery systems are medical devices designed to provide supplemental oxygen to patients who have difficulty breathing or low oxygen levels in their blood. These systems can include various methods such as nasal cannulas, oxygen masks, and ventilators, each tailored to meet the specific needs of the patient. These systems work by delivering concentrated oxygen directly to the lungs, improving oxygen saturation in the bloodstream. They are commonly used in hospitals, emergency situations, and for patients with chronic respiratory conditions like COPD or asthma. Proper use of these systems can significantly enhance a patient's quality of life and overall health.