I am the main caregiver for my mother at home. She needs oxygen 24/7 now. The problem is she keeps pulling off her cannula every hour or less when resting or during sleep hours. She has mild dementia and does not realize this. The machine she is using is the invacare platinum xl. The alarm on this machine is not very loud. I sleep in the adjacent room but don't hear it when asleep and I am worried. I called the company to see if they could adjust the alarm or if they have an add on accesory but no dice. Any suggestions would be greatly appreciated