I'm not sure if anyone is checking this forum, but I thought I'd post.
My wife has late-stage COPD. Smoked 30 years. Now wasting disease (she's 5-8 and 69 lbs). Wondering how to tell if there's a CO2 buildup. I know the pulse-Ox units add the CO2 to the O2 readings, giving a false good saturation.
Also, if anyone is dealing with cachexia (wasting disease), I'd welcome any thoughts.