Clean the area carefully with water or saline solution.
Try to cover the wound with the skin that is torn, as best as possible.
Use a daily antibiotic ointment, like Neosporin, on the wound.
Apply a non-stick dressing over the wound.
Wrap gauze around the area, over the non-stick dressing, and apply tape on the gauze to hold it in place (avoid tape on the skin as sometimes tape removal can cause the skin to tear further).
Change the dressing daily.
Once the wound is dry, it can be left open to air, especially in a clean and dry environment.
Watch for signs of infection and report this to the doctor, such as increasing redness or streaking, colored drainage, increasing pain or increasing swelling.
Insure that tetanus immunization is current (normally every 10 years but can repeat sooner, after five years, if it is a dirty wound).