My mother who is 55 her both  lungs are affected and doctor said there is nothing left in lungs. She had TB when she was 11 years of age. Now she constantly have respiratory problems like running nose, cough, cold, BP. If she walk upstairs 1 floor she struggles to breathe. Her oxygen level gows down & Pulse rate goes upto 135 - 140. However SPO2 comes back to 95 and pulse 110 after sometime. I am worried looking at her condition everytime, what shall I do? Can lung transplant be an option but I don't earn much who can afford. Kindly suggest something saving my mother