Veins, I believe is right.
Well it has to be a head injury because the brain is getting damaged
For 80–90% of people who have total knee replacement, the new joint should last about 20 years, and it may well last longer. If you've had a partial knee replacement, you're more likely to need a repeat operation – about 1 person in 10 needs further surgery after 10 years. The main reason people have this type of surgery is to no longer suffer from chronic and excruciating pain.
As soon as the death as possible. Parents will most likely need help to deal with the shock of this sudden death.