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People with COPD who need and use continuous oxygen therapy 24 hours a day tend to have a longer lifespan than those who use it only while awake (15 hours per day). In turn, individuals who use oxygen therapy 15 hours per day do better than those who use it only while they are sleeping. Publication Review By: Peter B. Terry, M.D., M.A. Published: 08 Aug 2011
COPD patients can live normally with higher levels of CO2 and lower levels of oxygen. For instance, a pt. with COPD can have a CO2 level of 50 and an oxygen level of 84 and that is their normal because they are have chronic respiratory failure just like pt. with C-spine injury or pt. with ALS.