I have just bought a oximeter from Amazon any idea how to use it. I was hopeing it would give me some idea if l need oxygen or not. If l'm have a coughing fit my husband says have some oxygen. I have no idea if l am short of oxygen or not, need ventolin, l seem to be getting confused dont l, l think the medics need to train us into coping with our illness. My oxygen drops very quickly bending down, walking from room to room, the disease has upped it a bit more as l'm finding it hard talking. My mum is finding it very hard bless her she does like to chat. The top part reads 79, when taking oxygen quickly goes to 88-89 if that helps.