My grandmother who is 87 fell and hit her head on fireplace, causing her to go to hospital and get head stapled. They sent her to rehab in a SNF and was released 30 days later. Ok we told them she uses oxygen at night for sleep when she was getting admitted. She was in hospital using oxygen and transfered using oxygen. They used oxygen on her 17-24 hours a day for 29 days it says. Then on the 30th day she was able to breath on her own. Her vitals were great, even her lungs. Nothing on discharge papers needing oxygen at all. Thank God we had some there or she would have died. Her oxygen pulse level was 79/54. I have read that you have to wein them off of oxygen. Is that true? What are the guidelines for the use of oxygen on patient and their release?