Both of my parents had surgeries in their 80s that were followed by severe post-operative cognitive dysfunction that lasted the rest of their lives. This wasn't normal dementia, this was a sudden and apparently permanent step change in cognition. Subsequently, I discovered the phenomenon is pretty common, but hardly being studied at all. It seemed the surgeons say it's an anesthesia problem and the anesthetists say it's a surgical problem, so nobody studies it.
Anyway, its good to see somebody paying attention, because I want this fixed before it happens to me!
Anyway, its good to see somebody paying attention, because I want this fixed before it happens to me!