Grip a suture needle securely using a needle driver instrument.

Push the needle through the skin and into the base of the wound. Then pull the suture through the first side of the wound.

Push the needle through the base of the opposite side of the wound and bring it out as before. Tie the suture to close the wound.

When the suture is properly in place, it should form a U-shape.

To tie a suture, first loop it around the needle driver twice. Next, grab the short end of the suture with the needle driver.

Start by creating the first knot of a loop. Next, make a second single loop in the opposite direction. This completes the square knot.
