Rightly or wrongly, I sent for an oximeter from amazon, £20.99. I am going to keep a diary of Richard's readings , like when I take the reading , what he has been doing etc. Only got it today, took a reading as he was sat eating lunch, 91, after he got up from table, walked across into other room, reading was down to 85, but came up again when he sat. Can anybody advise me whether its the right thing to do. I know his fingers go blue at the slightest exertion, don't know if it will help knowingwhat his oxygen level is, but last time he had a bad exacerbation and I called an ambulance, the reading was 74, prompting a hospital stay. I don't want to panic, and realise that I must give it chance to come up when it's down. Does anyone do home readings, or am I being naughty and playing nurse, and if so should I buy the nurses outfit from ann summers. I aren't being serious about that bit by the way, I wouldn't want to send his blood pressure up as well as his oxygen level.