A full thickness injury extends to which layer?

A full thickness injury indeed extends through the epidermis and dermis and continues into the subcutaneous tissue. This type of wound is characterized by the loss of the complete skin thickness, leading to exposure of underlying structures.

When a wound is classified as full thickness, it indicates that it has penetrated all layers of the skin, including the protective epidermis and the deeper dermal layer, which also serves vital functions such as sensation and vascular supply. The involvement of subcutaneous tissue is crucial because this layer contains adipose tissue and connective tissue, which provide insulation, cushioning, and nutritional support to the skin.

While some injuries may penetrate to the level of muscle or even bone, those would typically be categorized differently, often requiring specific interventions. Hence, the selection accurately captures the critical layers affected in a full thickness injury, emphasizing the extent of tissue loss and the potential for complications such as infection or delayed healing due to damage below the skin surface.