By Susan Taplinger
Read time: 3 mins.
Welcome back to Features & Fundamentals — the series that examines essential healthcare products and the design details that influence real clinical performance.
Today’s focus: oxygen concentrators and how they support respiratory care in practice.
Overview
Oxygen therapy delivers supplemental oxygen when the lungs cannot move enough of it into the bloodstream on their own. Oxygen concentrators support that need by supplying oxygen at controlled concentrations and flow rates directly from room air, providing a reliable source of therapy across a range of care settings.
An oxygen concentrator is a motor-driven device that pulls in air from the room and processes it to remove nitrogen and impurities. Inside the machine, a motor powers a small pump that draws air in and moves it through filters and separation chambers. The filters clean the air, and the chambers remove nitrogen, increasing the concentration of oxygen.
The concentrated oxygen then flows out through a connection port, where tubing connects to carry it to the patient. At the other end of the tubing, a nasal cannula sits in the nostrils, or a mask fits over the nose and mouth, depending on how much oxygen is needed.
Some setups include a small bottle attached at the outlet that adds moisture to the oxygen, helping to reduce dryness during extended use.
What It Does
Room air contains about 21% oxygen, which is fine for most healthy individuals. But for patients with reduced lung function, it may not be enough to maintain adequate oxygen levels in the blood. Oxygen concentrators increase the amount of oxygen available with each breath, typically delivering concentrations around 90–95%.
These devices deliver oxygen in two primary ways:
Continuous Flow
- Delivers a steady stream of oxygen at a set rate at all times
- Supports higher or continuous oxygen needs, including during sleep
- Found in most stationary concentrators, including standard 5-liter and higher-capacity 10-liter units
Pulse Dose
- Delivers oxySupports stable breathing patterns and portable use
- Supports stable breathing patterns and portable use
- Common in portable concentrators, with some models offering both pulse and limited continuous flow
Why It Matters
Low oxygen levels can quickly affect breathing, cognition, and overall stability. Even small drops can increase respiratory effort, reduce activity tolerance, and delay recovery.
Oxygen needs can change over time — increasing during activity, illness, or changes in condition. When oxygen delivery does not match those needs, patients may experience drops in oxygen levels or increased strain on the respiratory system.
What to Consider
Design features directly influence how well an oxygen concentrator performs in real care settings, supporting both clinical needs and day-to-day use.
- Flow Capacity: Standard 5-liter units typically meet most needs, while higher-capacity models (such as 10-liter) support higher oxygen demand, including advanced COPD and increased needs during illness or activity.
- Portability and Weight: Portable units are smaller and lighter to support mobility, while stationary units are larger and heavier but provide higher, more consistent output.
- Power and Battery Life: Stationary concentrators run on continuous power, while portable units rely on rechargeable batteries. Battery duration varies by setting and determines how long the device can operate during movement or travel.
- Alarms and Safety Features: Devices commonly include audible and visual alerts for low oxygen output, power loss, overheating, and system malfunction, helping identify interruptions in therapy.
- Noise Level: Noise output varies by model; quieter operation can improve comfort during extended use.
How It’s Trending
Oxygen concentrators continue to shift toward smaller, more portable designs, driven by demand for home-based care and greater patient mobility. Portable concentrators are one of the fastest-growing segments of the category, reflecting shorter hospital stays and increased emphasis on care outside traditional clinical settings.
Battery performance is also improving, with newer portable devices offering longer run times and more efficient oxygen delivery.
As oxygen therapy continues to move across care settings, selecting the right concentrator remains critical to maintaining consistent oxygen delivery and supporting stable respiratory care.
Stay tuned for more product insights in the Features & Fundamentals series.