Times have Changed

Times sure have changed. I remember the time when my greatgrandma required the use of oxygen tanks at home. This was over twenty years ago. Actually, we still had the old oxygen tank stored in the downstairs bathroom up until a few years back, not realising the potential risks. Can you imagine what would happen if there is a leak or rupture in that old thing? I supposed that is why these day, many opt to use respironics oxygen concentrator should the need arises. I hear that it's way safer, not to mention more convenient and economical.