TY - JOUR T1 - Response to: Correspondence on ‘Delayed collapse of flow diverter due to acute severe vasospasm: another concern for flow diversion in ruptured aneurysms’ by Kumar <em>et al</em> JF - Journal of NeuroInterventional Surgery JO - J NeuroIntervent Surg SP - 206 LP - 206 DO - 10.1136/jnis-2022-019420 VL - 15 IS - 2 AU - Ajay Kumar AU - Neha Choudhary AU - Anuj Prabhakar AU - Vikas Bhatia Y1 - 2023/02/01 UR - http://jnis.bmj.com/content/15/2/206.abstract N2 - Dear editor,We thank the authors for sharing their experience of ruptured aneurysms successfully treated with flow diverter stents (FDS).1 There are various causative factors of fish-mouthing and it can occur with any device. However, in our case, the device conformed to the morphology of the severely spastic vessel and collapsed at the proximal end. Other causative factors of morphological change of the device, such as insufficient proximal landing zone, oversizing, incomplete opening, … ER -