I was wondering what the end stages of pulmonary fibrosis looks like? Does the oxygen level increase? Does mobility decrease? My significant other has IPF, and has been diagnosised with it for about 1 year. But unlike other people stories I have read, he uses about 8 L of oxygen while sitting, unless he has a coughing fit, and then we go up to about 18 L, and when he moves he has to be on 10-15L. He's appetite has not decreased but his oxygen needs continue to increase. As such, I was wondering if anyone could tell me what the end stages of IPF look like? Thanks.