Best anasthetic for older patients to avoid contributihng to any Alzheimers or other dementia?

I have read that anesthesia can exacerbate the clumps and taus that make up Alzheimers. Anesthesia does not itself cause dimentia but it may contribute to a hastening of clumps and taus. I am 67 and dimentia has run in my family although not linearly. I would like to avoid it obviously, so I would like to be sedated in a way that has the least ability of damaging my brain but also keeps me from feeling and waking up during the procedure. The procedure is facelift, fat transer, lip lift.