Empty light bulb sign (brain death)
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Empty light bulb sign in brain(brain death)
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In brain death, on HMPAO-Tc99m imaging there is absent or reduced flow in the internal carotid arteries and increased flow within the external carotid arteries. This leads to absent uptake in the brain with subsequent increased perfusion in the nasal region. This appearance has been called the empty light bulb sign.
It has also been described as the hot nose sign.
-<p>In brain death, on HMPAO-Tc99m imaging there is absent or reduced flow in the <a title="Internal carotid arteries" href="/articles/internal-carotid-artery-1">internal carotid arteries</a> and increased flow within the <a title="External carotid arteries" href="/articles/external-carotid-artery-1">external carotid arteries</a>. This leads to absent uptake in the brain with subsequent increased perfusion in the nasal region. This appearance has been called the <strong>empty light bulb sign</strong>. </p><p>It has also been described as the <a href="/articles/hot-nose-sign">hot nose sign</a>.</p>- +<p>In brain death, on HMPAO-Tc99m imaging there is absent or reduced flow in the <a href="/articles/internal-carotid-artery-1">internal carotid arteries</a> and increased flow within the <a href="/articles/external-carotid-artery-1">external carotid arteries</a>. This leads to absent uptake in the brain with subsequent increased perfusion in the nasal region. This appearance has been called the <strong>empty light bulb sign</strong>. </p><p>It has also been described as the <a href="/articles/hot-nose-sign">hot nose sign</a>.</p>
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