Burns and Burn Injury Q 42 - Gyan Darpan : Learning Portal
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Thursday 31 March 2022

Burns and Burn Injury Q 42

Which of the following refers to a wound covering brought about by the donated human cadaver skin provided by the skin bank?
    A. Autograft.
    B. Homograft
    C. Heterograft
    D. Xenograft

Correct Answer: B. Homograft

Homograft is a tissue graft from a donor of the same species as the recipient. Skin from organ donors can be used as a temporary covering. It is temporary because this skin will eventually be rejected. This is known as a homograft. Homografts may be required initially if the injured area is too large to be covered by the patient’s own skin.

Option A: A skin graft, also known as an autograft, involves taking skin from an unburned part of the patient’s body and placing it on the wound after the burn has been removed.
Option C: Pigskin grafts are termed xenografts, or heterografts because they are transplanted from an organism of one species to that of a different species. Both allografts and xenografts are biologic dressings only, are ultimately rejected by the patient’s immune system, and need to be removed prior to definitive wound treatment or skin grafting.
Option D: Xenograft is a graft of tissue taken from a donor of one species and grafted into a recipient of another species. While xenografts are rejected before undergoing revascularization, allografts initially undergo revascularization but are typically rejected after approximately 10 days because of the strong antigenicity of the skin.

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