Ultrasound for the evaluation of stenosis after flow diversion

Abstract

Background and purposeFlow diversion is a relatively new strategy used to treat complex cerebral aneurysms. The optimal method for radiographic follow-up of patients treated with flow diverters has not been established. The rate and clinical implications of in-stent stenosis for these devices is unclear. We evaluate the use of transcranial Doppler ultrasound (TCD) for follow-up of in-stent stenosis.Materials and methodsWe analyzed 28 patients treated with the Pipeline embolization device (PED) over the course of 42 months from January 2009 to June 2012. Standard conventional cerebral angiograms were performed in all patients. TCD studies were available in 23 patients.ResultsAngiographic and TCD results were compared and found to correlate well.ConclusionsTCD is a potentially useful adjunct for evaluating in-stent stenosis after flow diversion.