COMPARISON OF ENDOVASCULAR TREATMENT OF RUPTURED AND UNRUPTURED INTRACRANIAL ANEURYSMS USING THE WEB 17 AND THE WEB 21 SYSTEM: A TWO-CENTER RETROSPECTIVE STUDY

Hintergrund: Many studies already verified the safety and effectiveness of the older generation Woven Endobrige (WEB) which need the VIA 21 microcatheter. Single studies reported about the newest generation of WEB 17, a smaller device with less and finer wires [1-3]. Methoden: Between August 2014 and May 2019 70 intracranial aneurysms in 69 patients were treated with the WEB 21 system and 137 intracranial aneurysms in 126 patients were treated with the WEB 17 system in two German centers. We retrospectively compared the safety and angiographic outcomes of the WEB 21 system and the new WEB 17 system. Ergebnisse: In 66 of 70 cases the Implantation of WEB 21 system and in 134 of 137 cases of WEB 17 system was successfully. Additional devices were necessary in 9 cases (13,6%) of WEB 21 group and in 16 cases (11,9%) of WEB 17 group. 5 (7,6%) thromboembolic complications were counted at WEB 21 and 7 (5,2%) at WEB 17. To date the angiographic outcome shows a complete/adequate occlusion rate of 68,5%/87,0% in the WEB 21 and 74,2%/88,8% of the WEB 17 group. Fazit: In summary the WEB 17 is at least as safe and effectively as the WEB 21. The most important advantage of WEB 17 is the possibility to treat smaller and more distal located intracranial aneurysms with less complications and promising occlusion rates. The results support the positive development of the WEB device and demonstrate the possibility to treat successfully even more aneurysms in the future.