HI , and thanks for your post and question. While I am hopeful others in the community will see your inquiry and respond, I have something to say too.
Are you able to share your concerns regarding emphysema and prospective knee replacement surgery? Is this something you are considering moving forward? Perhaps if you can share your questions/concerns, we can help you in a general way. I also think, if this is something you are facing, you may be able to discuss it with both your pulmonologist and the surgeon who will be doing the procedure.
What do you think?
Leon (site moderator COPD.net)