Sinusoid sign (ultrasound)
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The sinusoid sign is a dynamic sonographic sign, present when respiratory variation decreaes the distance between the parietal and visceral pleura, when separated by a pleural effusion. Classically demonstrated in M-mode, the appearance of which the moniker is derived, it is specific for the identification of a pleural effusion, although insensitive, as it may be absent with dense or heavily septated collections.
A subtype of the sinusoid sign is the "jellyfish"jellyfish sign," which alludes to the supposed appearance of this respiratory dynamic on B-mode.
The dynamic counterpart to the quad sign, it demonstrates the fluid dynamic of the collection observed, thus distinguishing a pleural effusion from other lung pathology, such as consolidation, or a hiatal hernia, both of which may appear anechoic and mimic the sonomorphology of a pleural effusion.
-<p>The<strong> sinusoid sign </strong>is a dynamic sonographic sign, present when respiratory variation decreaes the distance between the parietal and visceral pleura, when separated by a pleural effusion. Classically demonstrated in M-mode, the appearance of which the moniker is derived, it is specific for the identification of a pleural effusion, although insensitive, as it may be absent with dense or heavily septated collections.</p><p>A subtype of the sinusoid sign is the "jellyfish sign," which alludes to the supposed appearance of this respiratory dynamic on B-mode.</p><p>The dynamic counterpart to the <a href="/articles/quad-sign">quad sign</a>, it demonstrates the fluid dynamic of the collection observed, thus distinguishing a pleural effusion from other lung pathology, such as consolidation, or a hiatal hernia, both of which may appear anechoic and mimic the sonomorphology of a pleural effusion.</p><p> </p>- +<p>The<strong> sinusoid sign </strong>is a dynamic sonographic sign, present when respiratory variation decreaes the distance between the parietal and visceral pleura, when separated by a pleural effusion. Classically demonstrated in M-mode, the appearance of which the moniker is derived, it is specific for the identification of a pleural effusion, although insensitive, as it may be absent with dense or heavily septated collections.</p><p>A subtype of the sinusoid sign is the "<a title="Jellyfish sign (ultrasound)" href="/articles/jellyfish-sign-ultrasound">jellyfish sign</a>," which alludes to the supposed appearance of this respiratory dynamic on B-mode.</p><p>The dynamic counterpart to the <a href="/articles/quad-sign">quad sign</a>, it demonstrates the fluid dynamic of the collection observed, thus distinguishing a pleural effusion from other lung pathology, such as consolidation, or a hiatal hernia, both of which may appear anechoic and mimic the sonomorphology of a pleural effusion.</p><p> </p>
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