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Making Waves - All About Ultrasound

Internal Carotid Occlusion

11/21/2010

2 Comments

 
How would you adjust your ultrasound settings to go about proving this diagnosis? What waveform characteristics would you be aware of in adjacent vasculature?
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2 Comments
Tammy
3/23/2011 03:07:07 am

Is this an occluded ICA? Have to watch waveforms for internalization of the ECA, as it may take on characteristics of the ICA waveform.

Reply
Jose
6/12/2011 12:09:11 pm

You will have to decrease the color PRF ( scale ) to increase sensitivity to the slowest possible flow that might exists in that ICA. Also A high resitance doppler pattern in the more proximal segment (CCA) would be suggestive of an ICA occlusion. External to internal collateralization by obtaining a low resistance flow pattern in the ECA will confirm the ICA occlusion ( in this case the ipsilateral ophthalmic artery will have reversal of the flow. Also a contralateral ICA increase of the flow will compensate for that ICA occlusion, especially if there is an Anterior to Anterior collateralization.

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