question: Good Evening Sir or Ms., My friend has a M.D. order for home O2 due to Emphysema. He wants to wait until his C.T. results are in. By what He has told me he has a Tracheal issue as well-hence the CT. { apparently his Trachea is abnormal in shape. ] I say get the O2 now,use it as prescribed to see how effective it is in relieving his S.O.B. Your thoughts please,I thank you