Well they need to know your wishes. If this procedure has a 60% success rate but 95% of those people only survived with 75% brain function would you want it don

Well they need to know your wishes. If this procedure has a 60% success rate but 95% of those people only survived with 75% brain function would you want it done? Vs a procedure that has a 10% success rate but 95% of people who survived had complete brain functionality restored. Personally I'd want to take the 1/10 chance, but I'm sure there are a lot of people who would want to live even if it meant diminished mental capacity.