Reducing your O2 is a typical response to increasing CO2 levels. Unfortunately, it's not necessarily the best solution, because 1 LPM isn't always sufficient to keep you oxygenated during all your activities. If you stick to your nurse's orders, you may very well find yourself desaturating during activities like exercise, grocery shopping, going up stairs, etc. That leads to right heart failure and brain damage and you really don't want either. I would suggest you find a good respiratory doc and talk with her about this situation. What's considered good practice in the US is to go ahead and turn your O2 up when you are exerting yourself and then turn it back down when you're done. Another thing to ask about is a bi-pap or Triligy machine. These machines are designed to help you blow off the excess CO2. The other thing you need to remember is that purse lipped breathing (PLB) is designed to help you blow off CO2. So there are lots of options besides turning your O2 down.

With COPD, you can't exhale all the air you inhaled; it's called trapped air and it builds up over time. As the lungs retain this air, they become elongated and press against the diaphragm, making it hard to use the diaphragm to breathe. So it contributes to being short of breath and makes the chest bigger.

Happens because you can’t expel all the air in lungs before you inhale the next breath.

Thanks jean i already have heart illness and i cant go far without gasping right now my pulmanary nurse is due tomorrow and i will make a point of mentioning what you have pointed out to me babs UK

Thank you Jean.This is good info.My wife use's a vpap machine,Lumis st 100.for her when she is sleeping.it helps to ventilate her lung/s.The O2