I wonder if anyone else has had falls caused by the oxygen line. In the past six weeks I have had four bad falls caused by tripping over the oxygen line. I have had severe bruising, large blood. blisters, and after the latest fall cannot bear weight on my left leg for more than 5- 10 minute. Mercifully, I haven't broken any bones, but I think this is because I have had poor balance and been subject to falls since age 8 when encephalitis completely deafened one ear.Since that time I have had literally hundreds of falls and have never broken a bone. At age 80, I fell hip first onto a concrete sidewalk. Very bad bruise. No break. I don't think this is because I have unusually strong bones (I'm actually rather fine-boned) but because, after all these years, I have learned how to fall.
All this is merely prelude to asking why there are not more safety precautions built into oxygen regenerators: does the tube have to be transparent? Can it not come with a mild built-in cord retractor?