Step 1: Understanding the Question:
The image (as implied by the context of "deep burns" and "limb procedure") depicts linear incisions made through burned, leathery skin to relieve underlying pressure. Step 2: Detailed Explanation:
Pathophysiology of Eschar: In full-thickness (3rd degree) burns, the skin becomes a hard, non-elastic "eschar." When the burn is circumferential around a limb, the subsequent edema increases pressure within the compartment.
Escharotomy: This is an emergency surgical procedure involving incisions through the dead, burned skin (eschar) down to the subcutaneous fat.
Purpose: It is performed to relieve the "tourniquet effect" of the rigid eschar, thereby restoring distal circulation and preventing compartment syndrome. It is also done on the chest to allow for normal respiratory expansion.
Difference from Fasciotomy: A fasciotomy goes deeper, through the muscle fascia. An escharotomy only goes through the burned skin. If distal pulses do not return after an escharotomy, a fasciotomy may then be required.
Technique: Incisions are typically made in the mid-axial line (medial and lateral aspects of the limb) to avoid major nerves and vessels. No anesthesia is usually required as the eschar itself is insensate.
Step 3: Final Answer:
The emergency incision of burned skin to relieve limb-threatening pressure is known as an Escharotomy.
