Hiya if you Google hypoglycemic coma anorexia nervosa you will find several reports including PDF case studies for patients with liver complications.
I'm on my mobile, so can't link, sorry xx
From a very quick scan, it seems that iV nutrition (including glucose) is the common treatment along with careful monitoring of liver and extra support when necessary. It does seem that severe (coma inducing) hypoglycemia is rare in relation to eating disorders, however this presents the problem that no "typical" treatment protocol has been established. Sadly in several case studies the patients died.
With regards to oral (or ng) nutrition, It seems to be a catch 22... The liver needs the nutrition to recover, but the body needs the liver to be functional in order to use that nutrition... Therefore iv treatment is recommended.
Hope that helps x