The Orr-Trueta method is a technique for treating war wounds that was refined during the Spanish Civil War by Trueta, a Spanish surgeon who later worked in England. This method evolved from the Winett-Orr closed plaster approach for wound care. It involves the prompt removal of significant contamination and dead tissue, which includes surgically cutting away skin at the wound’s edges. The wound is then packed with gauze and sprinkled with sulfanilamide powder. A tight plaster bandage is applied over this, without any padding except over areas where bones protrude. This method avoids the use of deep stitches and typically the wound is left undisturbed for a minimum of 21 days. The original version used by Trueta did not employ sulfanilamide powder, or did so very sparingly, and involved packing with petroleum jelly gauze instead. This procedure is particularly effective for treating open bone fractures.