On Monday, September 30, 2013 10:32:02 AM UTC-5, Morgans wrote:
wrote in message ... That's amazing at your age Eric. Probably a defective oximeter. Also could be that he has reinoids syndrome (sp?) or something , which causes the blood flow to the fingers to be almost completely cut off when the fingers get cold, and they get cold very easily with this condition. Try hooking the sensor up to your ear lobe. Really. Jim in NC

I believe the condition you are referring to is "Raynaud's Phenomenon". And you're right .... it can/does restrict blood flow to some finger tips due to stress and/or cold. Finger tips could even turn blue.