A subcuticular Aberdeen stitch is a type of suture that is used to close wounds. It is a buried suture, meaning that the knots are buried under the skin and not visible. This type of suture is often used for cosmetic closures, as it leaves no visible scarring.
To perform a subcuticular Aberdeen stitch, the needle is inserted into the skin at one end of the wound and then passed through the subcutaneous tissue (the layer of tissue between the skin and muscle) at the same depth on the other side of the wound. The needle is then brought back up through the skin at the same point where it entered. This creates a loop of suture material under the skin. The needle is then inserted into the skin at the next point along the wound and the process is repeated. This is continued until the entire wound has been closed.
The final knot is tied under the skin, usually at the apex of the wound. This type of knot is called an Aberdeen knot, and it is used to prevent the suture from coming undone.