Marathon
I have two portable Marathons left by my O2 company. They are too heavy for me to lug around, but when I want to do at least 4.0 mph on the treadmill, I crank up my Marathon to 5 or 6 and go for it. I could never use it like that normally, but when working out it is great. Of course at 6lpm, you would be refilling often. I think if Ward is considering stem cell therapy, he will get relief with the amount of O2 needed. I was able to cut down very early on and have been reducing my usage ever since. In the meantime, however, it sounds like he will need something to increase his flow. There are some companies that sell used equipment if you have to buy one. American Medical Sales is one that Mary Jo likes. Hopefully, he just rents his equipment, can get stem cell therapy and then tell them to come pick it all up one day. That is what we all are working towards. It isn't an overnight cure by any means, but a very slow steady improvement almost daily.