Édouard-Pierre-Marie Chassaignac (24 December 1804 – 26 August 1879) was a French physician. He was born in Nantes and in 1835 became prosector and professor at the university and physician at the central bureau of the hospitals of Paris. He originated the surgical operation known as écrasement, by means of which tumors, piles, polypi, and other growths may be removed without the effusion of blood. The general introduction of drainage in surgery is also due to his initiative. He introduced the use of drainage tubes into surgery. Source: Wikipedia (en)