Oxygen therapy is a treatment that provides you with supplemental, or extra, oxygen. Although oxygen therapy may be common in the hospital, it can also be used at home. There are several devices used to deliver oxygen at home. Your healthcare provider will help you choose the equipment that works best for you. Oxygen is usually delivered through nasal prongs (an oxygen cannula) or a face mask. Oxygen equipment can attach to other medical equipment such as CPAP machines and ventilators. Oxygen therapy can help you feel better and stay active.

- COPD (chronic obstructive pulmonary disease)
- Pulmonary fibrosis
- Pneumonia
- A severe asthma attack
- Cystic fibrosis
- Sleep apnea

Sleep apnea is a potentially serious sleep disorder in which breathing repeatedly stops and starts. If you snore loudly and feel tired even after a full night's sleep, you might have sleep apnea.

The main types of sleep apnea are:
- Obstructive sleep apnea (OSA), the more common form that occurs when throat muscles relax
- Central sleep apnea (CSA), which occurs when your brain doesn't send proper signals to the muscles that control breathing
- Complex sleep apnea syndrome (MSA), also known as treatment-emergent central sleep apnea, which occurs when someone has both obstructive sleep apnea and central sleep apnea