My pulmonary Dr. says he is 80% sure that I have ideopathic pulmonary fibrosis. I want to know what I should be prepared for . I am 83 years old, in good general health, but my oxygen level is from 90 to the high 80s and I am tethered to an oxygen tank 24/7. My Dr. will be checking me regularly with various tests and I trust him, but would like more information on what this disease is and what I can expect. Thank you.

Summarized question: What is idiopathic pulmonary fibrosis?