Bingowings said:
As for Vader's lungs however they would certainly be damaged (presumably Vader used the force to keep himself alive while he waited to be rescued).

People who are trapped in house fires may suffer from smoke inhalation independent of receiving skin burns; however, the incidence of smoke inhalation increases with the percentage of total body surface area burned.

Vader receives massive burns to almost all of his remaining body and the heat and smoke would have been much more intense than in any house fire and would have effectively written off his lungs so I have no problem with him being stuck in the black suit after such a series of injuries.

But you forget that the reason smoke inhalation is such a serious problem to lungs is that it is in an enclosed space but the lava scene in in an open space so the smoke would never have affected him enough for the life-support suit.

AxiaEuxine said:
Ady are you really thinking of not having Yoda use his saber?

He won't be seen with a lightsaber until ROTS when he beheads the troops.