Abstract: A method of irrigation of a body cavity, promoting asepsis, in which an irrigant solution, preferably a solution of iodine, is introduced into an abdominal cavity, retained within the abdominal cavity until asepsis is achieved, and drained from the abdominal cavity. Preferably, the solution includes a local anesthetic and a binding agent such as glycol. A catheter apparatus particularly adapted for implementation of the irrigation method comprises a drainage means and an independent irrigation means. In the catheter, a first valve assembly is connected to the drainage means so that the drainage of fluid from the abdominal cavity may be selectively regulated. A second valve assembly provides for selective opening of the irrigation means to allow introduction of the irrigation solution into the abdominal cavity.