Entire dermis is devitalized. Wound cannot heal by epithelialization. Dermal blood vessel destroyed. This burn injury has to be grafted. It is dull red, leathery dry.
Age plays an important role.
Inhalation injury signs. Ryan in NEJM 98 report on Prognosticating factors in burn patients. Worst kind of burn. Most damages are in the deep tissue. Can be low or high voltage.