Oxygen concentrators are important medical devices, but like all technology, they are prone to decline and will fail over time. In regards to oxygen concentrators, the purity of the oxygen coming from your concentrator is extremely important and should be functioning within a particular range.
When you set 2 liters per minute (LPM) on your device, you expect to get 2 LPM of at least >95% purified oxygen. However, when concentrators malfunction, you might think you are getting 2 LPM, but in reality, the concentration could be 85% or even lower. This poses a serious medical concern because, in this scenario, you will not be able to rely on your concentrator to deliver the oxygen concentration that you need.