Running suture

(A) The closure is started with the standard technique of a percutaneous simple interrupted suture, but the suture is not cut after the initial knot is tied. 
(B and C)  The needle is then used to make repeated bites, starting at the original knot by making each new bite through the skin at an angle of 45 degrees to the wound orientation. 
(D) The cross stays on the surface of the skin will be at an angle of 90 degrees to the wound.  
(E and F) The final bite is made at an angle of 90 degrees to the wound orientation to bring the suture out next to the previous bite. The final bite is left in a loose loop, which acts as a free end for tying the knot.