There is a medical system, comprising a patient storage element (1), the patient storage element (1) being assigned to a patient by comprising identification information identifying the patient, a medical device (2), the medical device (2) being configured for a contaminating patient application, a medical device storage element (7), the medical device storage element (7) being provided on the medical device (2) and comprising use information, and a clearing device (3), the clearing device (3) being configured to receive the identification information from the patient storage element (1) and the use information from the medical device storage element (7), analyze the use information and optionally the identification information, and if in the step of analyzing it is found that application of the medical device (2) to the patient is allowed, output a clearance signal. There is further a method for operating the medical system.