Mannheim Peritonitis Index. A prognostic scoring system used to predict mortality in patients with peritonitis. Long-term survivors have an MPI score of about 20; non-survivors have a score of 33. Risk factorâScore.
What we do know for sure about the Three-Eyed Raven is that he is a Greenseer, gifted with the ability to see the past, present, and future and communicate through dreams. Greensight is more common with the Children of the Forest, but some humans, like the Three-Eyed Raven, also have this ability.
In the Bran flashback scene, we see Lyanna on a horse, Hodor talking and the three-eyed raven warning Bran not to stay in visions too long. It seems a little random, but if the theory is true, then it all makes sense. If Bran stays in visions or wargs for too long, he may lose himself like Hodor.