Ambroise Par was a French barber surgeon who served in that role for kings Henry II, Francis II, Charles IX and Henry III. He is considered one of the fathers of surgery and modern forensic pathology and a pioneer in surgical techniques and battlefield medicine, especially in the treatment of wounds. He was also an anatomist and invented several surgical instruments. He was also part of the Parisian Barber Surgeon guild.
Par was born in 1510 in BourgHersent in northwestern France. As a child he watched, and was first apprenticed to, his older brother, a barbersurgeon in Paris. He was also a pupil at HtelDieu, Frances oldest hospital. Par first experienced being a battle medic at Piedmont, during the campaign of Francis I. When, one day, he was presented with more gunshot wounds than he had oil for, he improvised and used an old Roman technique, using oil of roses, egg white, and turpentine. He worried through the night that the soldiers would die, but to his surprise, he found the next morning that the soldiers treated with oil were in agony, their wounds swollen and some had even died during the night, whereas the men treated the Roman way were well rested, their wounds calm and beginning to heal. He then continued with this approach to sealing wounds, rather than the largely accepted method of cauterizing wounds. His new technique was not perfect, as there was still a chance of infection and the pain
Source: Wikipedia