Had an appointment with the Respiratory Dept at St. Thomas today. It's only the 2nd time I've been monitored, the last time was about 6 years ago, then it was established that my oxygen level dropped after walking for 6 minutes from 98 to 82, but as soon as I stopped walking it reverted back to normal. This time, after walking for 6 minutes it dropped from 96 down to 77, but returned to 95 - shock horror. They wanted me to have oxygen at home for when I go out, but while I can get by without it I will do so, even if I have to stop more often. Any advice!