I've been around Doctors and ill people for a few years now to have picked up a thing or two. My sister-in-law and her boyfriend stayed with us over the weekend and he was complaining about breathlessness and the swelling around his ankles. To me these are the very familiar symptoms of lung or heart problems.
I got my sats metre out of the draw and placed it on his finger. He showed 89 at rest which was lower than me at the time. I then checked out everyone else who was there to check the calibration of the metre and they were all 97/98 as expected. I then checked him again and it was still 89.
I told him that it would be a good idea to see his GP when he got home. He did more than this, he booked an appointment over the phone for the next day back in Stockport where they live.
His doc was concerned enough to book him for blood tests and a chest x ray the following day and he is now awaiting results.
If you want a consultancy meeting then my fees are very agreeable.
Ok maybe I not quite a qualified GP yet but It seems as though I have picked up a thing or two.
Doctor Tony