Sinusoid sign (ultrasound)

Changed by Daniel J Bell, 10 Feb 2018

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The sinusoid sign is a dynamic sonographic sign in M mode-mode describing the movement line representing the lung towards the pleural line which is displayed as a sinusoidal pattern. Similar to the quad sign, this sign has a high sensitivity and specificity for pleural effusion, which is anechoic in itself.

  • -<p>The<strong> sinusoid sign </strong>is a dynamic sonographic sign in M mode describing the movement line representing the lung towards the pleural line which is displayed as sinusoidal pattern. Similar to the <a href="/articles/quad-sign">quad sign</a>, this sign has a high sensitivity and specificity for pleural effusion, which is anechoic in itself.</p>
  • +<p>The<strong> sinusoid sign </strong>is a dynamic sonographic sign in M-mode describing the movement line representing the lung towards the pleural line which is displayed as a sinusoidal pattern. Similar to the <a href="/articles/quad-sign">quad sign</a>, this sign has a high sensitivity and specificity for pleural effusion, which is anechoic in itself.</p>

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