As more people are discovering the benefits of portable oxygen concentrators, manufacturers are seeking to produce units that provide greater mobility. Smaller and lighter is the goal, without sacrificing clinical efficacy.
Inogen has been a leader in the portable concentrator market, being one of the first companies to offer a portable oxygen concentrator with their Inogen One POC. Never resting on their laurels, Inogen has since introduced a second-generation unit, the G2; and most recently, a third-generation unit, the G3. Each generation has been over 40% smaller, and 30% lighter, than its predecessor, with the new Inogen One G3 weighing less than five pounds.
How does the Inogen One G3 compare with other 5-pound portable concentrators?
Inogen is not the only manufacturer of portable concentrators weighing less than five pounds. The AirSep FreeStyle 3 has long been available, and the Inova LifeChoice Activox has recently come on the market. I’ve already stated that size matters, but if all the units are similar in size and weight, which is better?
The first question to ask is always, “Which one provides the most oxygen?” All three units provide pulse-only settings. While the FreeStyle and Activox provide up to setting 3, the Inogen One G3 provides up to setting 4. So if your oxygen needs are higher, the Inogen One G3 is the best choice.
Furthermore, according to a recent study of POCs weighing less than five pounds, completed by Strategic Dynamics, Inc., the Inogen One G3 offers the most oxygen for those with high breathing rates. They conclude:
First, the Inogen One® G3 produces and delivers more oxygen than the other POCs at all breathing frequencies, and has a higher range of settings (4 versus 3 or 1 for the other devices).
Second, and perhaps the most important finding from the standpoint of clinical application, is that oxygen delivery for all POCs in this study decreased as breathing frequency increased.
For example, at a setting of 2, the inspired oxygen concentration fell from a high of 23.5% at 19 breath per minute (Inogen One® G3) to a low of 21.9% at 35 breaths/min (CAIRE-Focus).
Only the Inogen One® G3 would be able to compensate for this by increasing the setting from 2 (at 19 breaths/min) to 4 (at 35 breaths/min) to maintain an inspired oxygen concentration of about 24%.
It appears the Inogen One G3 is a small powerhouse portable oxygen concentrator, ready to meet the demands of many oxygen users.