The present invention relates to a method for controlling the gas temperature in medical devices by means of a state observer, e.g., in the field of laparoscopy or respiration, and to devices for carrying-out said method.本發明係關於(例如)在腹腔鏡術或呼吸領域中借助狀態觀測器用於控制在醫療裝置中之氣體溫度之方法及用於實施該方法之裝置。