Does that mean you're replacing cannulas and oxygen cylinders with oxygen concentrator, Theland? That's what happened with my wife as the COPD beme more troublesome. It wasn't worse for her than the cylinders and in some ways easier.
But good luck, bonne chance, bon courage.
(Meanwhile, it's raining here in West London, and one of my cats has just come in soaking wet, demanding Dreamies and threatening to knock the drink out of my hand. And you think you've got problems, Theland.)