Data from Pipeline Vs Surpass Flow Diversion Study

Patients who underwent a flow diversion procedure with Pipeline Embolization Device, Pipeline Flex, and Surpass Streamline from October 2012 to February 2020 were included in the study. Demographic data including age, sex, comorbidities, and history of previous aneurysm treatment were collected by the authors at each center from the electronic medical record. Aneurysm laterality, location, morphology, dome height, and neck width were recorded from digital subtraction angiography. For aneurysms located in the cavernous portion of the internal carotid artery (cICA), digital subtraction angiography images were extracted to assess cICA tortuosity using a I-IV grading scale.14 Two authors (C.F. and J.V.-S.) independently reviewed and classified the tortuosity of each cICA case, with each blinded to the other’s assessments. Any discordant grading between these authors was resolved by a third author (R.H.), who acted as a tiebreaker and determined the final tortuosity grade. Procedural details including case duration, radiation exposure, and the number of flow diverters deployed were extracted from the operative notes. Technical metrics of the procedures included the success of device deployment, foreshortening, kinking, or adjuvant device use. Periprocedural adverse incidents occurring up to when the patient was discharged from the FD procedure were recorded as well.