Evaluation of Sleep Mode Within the Respironics SimplyGo Portable Oxygen Concentrator

All participants will undergo a single night polysomnography testing in a sleep lab while they're oxygen saturation (SpO2) is monitored. The study has a cross-over design, in which participants will receive their oxygen prescription in two different modes at different times during the night. The assignment (sleep vs. continuous mode) to which participants will initiate the night will be randomized, and all participants will utilize each of the two modes during the study. The hypothesis of this study is that there will not be a significant difference in SpO2 for participants while they use the SimplyGo Portable Oxygen Concentrator, set in 'Sleep Mode', or pulsed oxygen flow, as compared to their SpO2 while on continuous flow oxygen during sleep during the course of the one night sleep study.