Proper technique for wound edge eversion

The proper technique for everting the edges of a wound is illustrated in the panels on the left.
(A) The needle has been inserted at a 90 degree angle.
(B) The suture loop is as wide at the base as it is at the skin surface. The width and depth of the suture loop are the same on both sides of the wound. In the panels on the right, improper technique has resulted in inversion of the wound edges, which will interfere with wound healing.
(C) The needle has entered the skin at an angle.
(D) The base of the wound is narrower than the skin surface.