The chest bandage application can also be applied for the back. What is shown below is the application for the front (chest area). Simply do the same steps on the back if the bandage is to be applied for back injuries.
Locate the apex of triangular bandage, place on the shoulder above the affected chest (figure 1). In this case, the affected side is the right side. It follows that the apex will be on the left shoulder if the left side of the chest is the injured side.
Bring the two points at the back, making some adjustments of the base of triangular bandage (figure 2)
Make a first square knot at the back of patient, make sure the knot should be aligned with the apex of triangular bandage (figure 3)
Make your 2nd square knot, using the longer point with the apex (figure 4)
Hide the excess points of square knot, housekeeping purpose (figure 5)
Make some adjustments on the base and sides of the triangular bandage by folding them outside (figure 6). This will tighten the bandage and will hold the dressing in place.