What is the defining characteristic of a single intradermal suture?

The defining characteristic of a single intradermal suture is that it is directed through the subcutaneous tissue only. This technique involves placing the suture within the dermal layer of the skin, which is crucial for minimizing visibility when the wound heals. The intradermal suture is designed to lie flat beneath the surface of the skin, effectively closing the wound without leaving external sutures visible and reducing the potential for scarring, which is why it is favored for cosmetic results.

The emphasis on creating a tension-free closure helps to facilitate the healing process and can be particularly beneficial in areas where cosmetic outcomes are essential. This technique allows the skin edges to approximate closely without external sutures, making it an effective choice for certain types of incisions or lacerations.