hot nose sign
Radionuclide
scan of the head with Tc-99m Neurolite shows lack of intracranial blood flow and "hot-nose" sign from diversion of blood flow to the external carotid arteries.
Hot nose sign
• Hot nose sign - brain death - Ganzer Fall bei Radiopaedia
Hot nose sign
• Traumatic brain injury resulting in brain death - Ganzer Fall bei Radiopaedia
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bulb sign (brain death) • Cystic glioblastoma - Ganzer Fall bei Radiopaedia
Hot nose sign
• Brain death after motor vehicle collision - Ganzer Fall bei Radiopaedia
The hot nose sign refers to increased perfusion in the nasal region on nuclear medicine cerebral perfusion studies in the setting of brain death. The absent or reduced flow in the internal carotid arteries is thought to lead to increased flow within the external carotid arteries and subsequent increased perfusion in the nasal region .
Practical points
Although the sign is cute, it is not of any real diagnostic value. The medicolegal importance of brain death is such that direct assessment of cerebral perfusion is required for diagnosis irrespective of how hot or cold the nose may appear.
Siehe auch:
Assoziationen und Differentialdiagnosen zu Hot nose sign in brain death:
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bulb sign (brain death)