I am kind of new to all of this and I hope someone can answer my questions. First of I am a 100% disabled Vietnam era veteran and in a electric wheel chair. I am a right leg amputee with a list of medical problems that seems to be a mile long. Here are some of those problems: diabetic on insulin, hepatitis B, Sarcoid diagnosed in 1973 by lung biopsy, factor 5 Leiden gene mutation, lose of use left leg due to diabetic neuropathy and atherosclerosis fibromyalgi with multiple ulcers that drain beyond belief, two heart attacks loss of sternum due to infection after heart surgery, depression, anxiety, PTSD, multiple blood clots in both legs, green field stint, fractures of my right femur x2 impact damage to right knee due to landing on the end of my stump, oh i forgot I also had a dual pectoral flaps to help close the area that was left by the removal of my sternum, I also have COPD with pneumonia in both lungs, sarcoid emphysema and there is more but back to my main question I know have a flux between my oximeter readings of 83 to 90% I don't know when to put my oxygen on because this just know happening for the past 4 or 5 days my heart doctor told me to were my oxygen at night. when I check my meter I think it is going to be around 90% or so but it scares me know because it pops up with 80 to 84% I put my oxygen on for a bit and then it will read 85 to 87% and might hit 90 but just for a second or so and then back down. I don't know when I should were the oxygen or not could someone explain this meter to me so that I have a better understanding the doc seem to leave me in the dark oh I forgot I also have congestive heart failure. I don't know how to explain how I feel when this is going on I so know something hits me that something is not right ask me how I felt with the congestive heart failure and i can tell you this much I don't want to ever go through that again. I have been through that twice and I think I would rather die than do that again because that is not being able to breath and what I am having now is like the veryveryveryvery beginning of the heart failure. I have actually coughed up just clear fluid going through the failure the paramedics that came to get me in the crash wagon said it was fluid in my lungs that i was coughing up. somebody help me with this understanding or what I should or should not do I use 2 liters of oxygen when breathing through the nasal cannula