FALSE-NEGATIVE CEREBRAL RADIONUCLIDE FLOW STUDY, IN BRAIN-DEATH, CAUSED BY A VENTRICULAR DRAIN

A radionuclide cerebral blood flow study demonstrated normal flow in t he face of clinical and electrical brain death in a patient who had a ventricular drain. After the drain became obstructed and was removed, a further radionuclide study demonstrated no flow, confirming the role of the drain in the earlier false-negative studies.