Nocturnal oxygen research is the study of oxygen levels in the blood and tissues of individuals during sleep. This area of research focuses on understanding how oxygen levels can be affected during sleep, especially in individuals with respiratory disorders such as sleep apnea, COPD, or asthma. Researchers in this field investigate the role of nocturnal oxygen therapy, continuous positive airway pressure (CPAP) devices, and other treatments to improve oxygen levels during sleep and overall health outcomes. By monitoring nocturnal oxygen levels, researchers aim to identify risk factors and develop interventions to improve sleep quality and reduce complications associated with low oxygen levels during sleep.