The adjustment and stabilization of the body temperature of a patient is achieved by an actively controlled infusion of fluid of a preferably known and/or controlled temperature, employing a feedback control with body temperature being a measured variable and fluid flow being an actuating variable. According to a particularly preferred embodiment of the present invention, the adjustment and stabilization of the body temperature of a patient is achieved by an actively controlled balance of volume flows of infusion fluids provided at temperatures differing from one another. The volume flows result in a combined volume flow at a suitable temperature being continuously infused into the patient.
