Burn Classification & TBSA Assessment Burn severity depends on depth, extent (TBSA), location, and patient risk factors. Depth is classified as partial-thickness (epidermal/dermal; painful, red, blistered) or full-thickness (dermal destruction, painless, leathery eschar, visible thrombosed vessels). TBSA is estimated using the Rule of Nines for adults or the Lund-Browder chart for children. Referral to a burn center is indicated for partial-thickness burns >10% TBSA, chemical/electrical burns, inhalation injury, or burns of the face, hands, feet, genitalia, perineum, or joints. Face, neck, and circumferential torso burns threaten ventilation. Circumferential limb burns impair perfusion, requiring escharotomy.

Emergent Phase Pathophysiology & Resuscitation The emergent phase (first 72 hours) prior ...