Abstract: Objective  To investigate the efficacy and safety of flow diverter (FD) in the treatment of blood blister-like aneurysms(BBAs).Methods A retrospective analysis was conducted on the clinical data of 13 patient with BBAs treated with FD in our department from January 2020 to december 2024 including general information,clinical manifestations,imaging data,operation data and prognosis,etc.Results 13 FDs were implanted successfully in 13 patients.There were 4 patients with ischemic complications intra and postoperation.There was no bleeding complication or operation related death.The first DSA follow-up after discharge was completed within 3-6 months after operation,and all BBAs were cured.There were 4 patients of mild to moderate stenosis in the stent.13 patients were followed up for 6-18 months ,with an average of (10±3) months and without BBAs bleeding again.6 months after operation,12 patients had mRS score of 0,1 patient had score of 2.Conclusion Treatment of BBAs with flow diverter is safe and effective,and has a good prognosis,but ischemic complications cannot be ignored.

Key words: fow diverter, blood blister-like aneurysms, efficacy analysis