Thank you Sunny for your input,since placing this submission I have had a long chat with the COPD nurse,she actually spent ages listening to my concerns and was very kind/informative ,confirming to me she is also keeping an eye on the situation.
I think that your patient needs another evaluation by his doctor. It looks like his O2 requirements have changed some. Is there any way to get him to his doctor so that he can get a better look at him? His heart and lungs sound like they are stressed with the low O2 levels (chest pain and shortness of breath).
I hope that things work out....I think it is wonderful that this person has such a caring individual in his corner.
Sunny