Health update: Last night was my first night sleeping without oxygen since October 26!

Weeks ago, Dr. Donlan, the pulmonologist, released me from using oxygen during the day. But, he said, blood oxygen levels drop during deep sleep, so he kept me on oxygen at night. He said to monitor my levels during exercise; exercise levels are about what night time levels are. I've been using a stationary bike (thanks, Dick and Dorothy Reeves!) and monitoring my blood oxygen while exercising (thanks, Paul Reier, for the use of a "pulse-ox meter"), and that oxygen level has stayed up over 90%. I reported that to Dr. Donlan and he released me from night time use. Hooray!