I have had a serious fear for years that keeps me up at night, and I have decided that I am ready for an answer now. When my son was about 18 months old, he got RSV and was prescribed nebulizer treatment for a week or two. The doctor warned us that the nebulizer needed to be cleaned very well, as the virus is very contagious. I cleaned it after every use in a panic, and after a few days I decided my cleaning wasn't good enough, so I started using 70% isopropyl alcohol. I followed some instructions online, by washing first, then soaking in alcohol. For some reason I either didn't see or had some kind of decision-making failure, and I failed to follow the last step: rinsing the things after the alcohol. The pieces dried, and my son had a treatment some time later after it had air-dried. He always fought the treatments, he never liked them, and he fought this one really hard, but stopped fighting after a few minutes like he normally did. I know how he felt and what he smelled, because I use a CPAP and cleaned mine at the same time I had cleaned his nebulizer, in the exact same fashion. When I went to put it on that night, I was overwhelmed by the smell of alcohol fumes and immediately had to rinse it. That was what I had held on my son's face for about 7-10 minutes. I imagine this caused him some pretty severe oxygen deprivation in that time. Is it possible I gave him any kind of brain damage?