George W. Crile

George Washington Crile (November 11, 1864 - January 7, 1943) was an American physician and surgeon, recognised as the first to have succeeded in a direct blood transfusion and as developer of balanced anaesthesia, a technique to prevent shock during surgery. In his later writings, Crile proposed that the autonomic nervous system and the endocrine glands are regulators of energy within the body, and that many diseases are caused by an excess or imbalance of vital energy.