[Absence of cerebral perfusion. A simple isotope method for demonstrating cerebral death]

Absence of cerebral perfusion as proof of cerebral death can be demonstrated angiographically by isotope techniques. Comparison of the methods has shown that isotope flow studies are technically simpler, are devoid of risk and can be carried out without additional injections in a few minutes. Our own observations and those of others have shown that an extended observation period is necessary in order to diagnose absence of cerebral perfusion and consequently of cerebral death. Clear documentation of events recorded radiographically and related to the speed of flow of the radioactive substance is of great value from a diagnostic and forensic point of view.