Mother in law has COPD and from time to time will accidentally knock the tubing off the oxygen generator. She doesn't notice it until she gets to feeling sick and her blood O2 is way down. Are there any devices that can detect this situation? Is there a better connection method?
Sometimes it has to be twisted back and forth a bit to ensure that it's secure, but once it's on, it rarely comes off without force. In fact, in my experience, it's usually a bit difficult to remove.
Check to see if it's just sitting on the plug or if it's actually been twisted on and "screwed onto" the plug.