82 year old woman good health prior to surgery went in for surgery for removal of bladder. She was then dx with diverticulitis during surgery and the dr opted to reroute the colon and therefore she has a colostomy and urostomy bags. She was under general anesthesia for 6 hours and after surgery she was delierious for 2 weeks post surgery followed by severe memory loss that resulted in extreme depression, withdrawl, loss of appetite. The question is can general anesthesia cause severe short and long term memory loss? Any input would be appreciated. Thank you.