I had 6 valves installed 5 months ago and I got way worse than I was. I went from 0-2 lpm part of the time to 4 lpm all the time. While in the hospital I got pneumonia and it lasted for weeks. I went to the hospital for the pneumonia and spent a few days there again. Then I went back into get the valves removed. I got even worse after the valves were removed I still had pneumonia and my lung collapsed I spent 6 week in ICU. Instead of going back to where I started before the procedure. Now I'm at 6-8 lpm all the time and need an electric wheel chair to go long distances. This is just my. story some people do well with the valves. The part that upsets me is a lot of the information about the valves say it is reversible and people go back to the pre procedure status. I don't think that going back to the pre procedure status is a given like everything else it more than likely is a case by case situation. I had the procedure done because I thought it would help and if it didn't I believed what I read that if they didn't work I could go back to where I was before the procedure. Now I went from not needing oxygen all the time to not being able to walk 20 feet without it. The reason for this post is I have not seen posts where people talked about the possible effects of the procedure or the results of the procedure even after the valves were removed.