Adequate oxygenation is necessary for optimal organ/body function. Chronic low oxygen levels put an additional strain on the heart and lungs. Supplemental oxygen has proven helpful in the treatment of Cardiopulmonary Disease such as, Chronic Obstructive Pulmonary Disease (Chronic Bronchitis, Chronic Asthma, and Emphysema) Congestive Heart Failure, Interstitial Lung Disease and Pulmonary Hypertension.