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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CommentsTammy 03/23/2011 10:07am
Is this an occluded ICA? Have to watch waveforms for internalization of the ECA, as it may take on characteristics of the ICA waveform. Jose 06/12/2011 7:09pm
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. Leave a Reply | 
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