Abstract
A main condition for medical treatment is considered to be the »informed consent« of the patient. This criterion protects his/her autonomy. In certain cases, however, it is not applicable, since the patient is not able to give his consent. This may lead to the discrimination of a considerable group of patients, where medical interventions must be refrained from, because of the lacking consent of the persons in question. This concems especially research for the benefit of others and euthanasia. Basing on the concept of the person, this paper develops criteria which should be applied if »informed consent« is not applicable