RT Journal Article SR Electronic T1 Delayed collapse of flow diverter due to acute severe vasospasm: another concern for flow diversion in ruptured aneurysms JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP neurintsurg-2022-018984 DO 10.1136/neurintsurg-2022-018984 A1 Ajay Kumar A1 Neha Choudhary A1 Anuj Prabhakar A1 Vikas Bhatia YR 2022 UL http://jnis.bmj.com/content/early/2022/06/14/neurintsurg-2022-018984.abstract AB In vivo morphological change of flow diverter stents (FDS) is a known phenomenon and can be seen secondary to various device- and vasculature-related factors such as improper sizing of the device, twisting of the device in tortuous anatomy, insufficient proximal landing zone, and insufficient chronic resistive force of the stent, etc. However, we have encountered a case where severe vasospasm due to aneurysmal subarachnoid hemorrhage led to the collapse of the proximal end of the FDS. Development of vasospasm and consequent possible failure of the device should be taken into consideration when planning flow diversion in ruptured aneurysms.