[New guidelines for the diagnosis of irreversible loss of brain function : Concept and limitations, organizational demands, and implementation].

In 2015, the German Medical Association (Bundesärztekammer) issued new guidelines on the diagnosis of the "irreversible loss of brain function" (ILBF). ILBF replaced the colloquial term "brain death" in order to leave the notion that concepts of death might vary such as "cardiac death" or "apparent death" and stress the objective medical-scientific matter. The German Transplantation Law describes ILBF as "the final, irreversible loss of all function of the cerebrum, cerebellum, and brainstem." The new guidelines are to be followed closely. They demand higher qualifications of physicians involved in the diagnosis of ILBF and emphasize at the same time the interdisciplinary approach and the mandatory involvement of at least one specialist in the neurological field. Several technical methods were added as additional tools to support the ILBF diagnosis such as CT-angiography and duplex ultrasound of brain and neck vessels. The new guidelines thereby raise the impact of demonstrating complete cerebral circulatory arrest but leave other options to prove irreversibility. Many procedures, such as the apnea test, were specified in more detail. This article summarizes the new features of the new guideline with a practical overview on who must be involved in the diagnosis of ILBF, how often, how the diagnosis is achieved stepwise from stage I to III and how it is secured as well as what technical methods may be involved at what stage of the procedure.