The dressing should be sterile and large enough to cover the wound. It should not stick to the wound, so ideally it should have a low adherant surface. The dressing should be absorbant enough and should not be so tight that it restricts the blood flow to the rest of the limb. Sometimes a simple adhesive dressing or plaster is sufficient. Remember hygiene is essential when dealing with wounds. As well as wearing gloves you should use specialistcleaning agents and dispose of soiled dressings in yellowclinical waste bags. Wash your hands before and after dealing with the casualty.