My mother uses the Philips Everflo oxygen concentrator. Due to a serious injury to the nasal septum caused by the canula, the nasal canula has been discontinued and my mother has been switched to an oxygen mask. This has seriously affected the quality of life as it impacts eating, drinking and causes a general sense of unease. There is no option in the market for a small mask that covers only the nose and leaves the mouth open. I have looked at pediatric masks but they are a poor fit. CPAP masks seem an option as they have pico masks that can use an adaptor for the oxygen concentrator and plug into the CPAP tube. But, the CPAP end will be open if we use it. Does anyone know about possible options? Ideally, I would have thought that we would have different options for a mask but sadly there is no option other than a canula. Any helpful info would be appreciated.