BBC News - Israel ex-PM Ariel Sharon 'critically ill' Now I may be missing something but he's been in a coma since 2006. How does it get worse, apart from actually croaking??
I am no expert, but possibly medically induced coma-' controlled' vs 'uncontrolled' , as in the individual goes into coma/deeper coma by virtue of illness worsening?
"After a second, major stroke in 2006, he went into a coma and has been in a persistent vegetative state ever since." - so it wasn't medically induced.