Oxygen therapy is a central clinical intervention for patients with respiratory disease, using supplemental oxygen to correct hypoxemia and reduce the burden of chronic conditions. For patients with asthma, chronic obstructive pulmonary disease, emphysema and amyotrophic lateral sclerosis, carefully designed oxygen regimens can ease symptoms and improve quality of life in clinical practice.
The primary goal of oxygen therapy is to maintain normal physiological metabolism by supplying additional oxygen when a patient’s respiratory function is impaired. Physicians typically tailor a regimen to the severity of the condition and the patient’s daily routine, adjusting flow rates and delivery methods as needed.
For patients who experience interrupted breathing or hypoxemia during sleep, clinicians may prescribe nocturnal oxygen therapy. The approach is intended to reduce morning headaches and daytime fatigue associated with overnight oxygen desaturation.
The choice of delivery device depends on a patient’s oxygen flow requirements and mobility. The following devices are widely used in clinical and home settings.
| Device | Mechanism | Flow range |
|---|---|---|
| Continuous nasal cannula | Delivers a steady flow of oxygen to the nasal passages through tubing | Up to 6 liters per minute |
| High-flow nasal cannula | Provides a continuous high flow of oxygen | Up to 15 liters per minute |
| Simple oxygen mask | Covers the nose and mouth to deliver continuous oxygen | For high-flow requirements |
| Oxygen conserving regulator | Connects to a portable cylinder and releases oxygen only during inhalation | Demand-triggered |
In addition to delivery devices, oxygen therapy relies on supply sources designed for different care settings and levels of mobility.
Continuous oxygen monitors are used to track blood oxygen levels in real time, helping clinicians determine whether a prescribed regimen is meeting treatment goals. Because oxygen needs can change with activity, sleep and disease progression, regular assessment remains central to safe and effective therapy.
The clinical emphasis is on matching the oxygen source and delivery device to the patient’s condition, mobility and flow requirement.