RT Journal Article SR Electronic T1 Nuisance bleeding complications in patients with cerebral aneurysm treated with Pipeline embolization device JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 247 OP 250 DO 10.1136/neurintsurg-2020-016245 VO 13 IS 3 A1 Elliot Pressman A1 Carlos A De la Garza A1 Felix Chin A1 Jacob Fishbein A1 Muhammad Waqas A1 Adnan Siddiqui A1 Kenneth Snyder A1 Jason M Davies A1 Elad Levy A1 Peter Kan A1 Zeguang Ren A1 Maxim Mokin YR 2021 UL http://jnis.bmj.com/content/13/3/247.abstract AB Background Patients with cerebral aneurysms treated with the Pipeline embolization device (PED) are maintained on dual antiplatelet therapy (DAPT) to prevent thromboembolic complications. Rates of minor, “nuisance” bleeding in these patients remain unknown. We sought to evaluate the frequency and factors associated with this bleeding and its effect on DAPT compliance.Methods We performed a multicenter retrospective cohort study on consecutive cases of intracranial aneurysms treated with PED. Patient characteristics, aneurysm characteristics, and bleeding complications were analyzed. Severity of bleeding was defined according to a previously published classification defining nuisance bleeding as easy bruising, bleeding from small cuts, petechia, and ecchymosis.Results 245 PED aneurysm procedures on 243 patients were retrospectively collected from three academic centers over a 4.25-year period. Sixty-seven patients (27%) had nuisance bleeds. Patients with a higher risk of nuisance bleeding were older (59.1±3.4 vs . 54.7±2.2, P=0.032). Patients with nuisance bleeds were more likely to have their DAPT regimen changed or dose lowered (29% vs 8.3%, P<0.001), were on DAPT for less time (10.0 months±2.60 vs. 14.6 months±1.95, P=0.005) and were more likely to have aneurysm occlusion at 6 months (P<0.001). Stepwise logistic regression found age predictive of a nuisance bleed (OR=1.033)Conclusions Nuisance bleeding was a common complaint of PED-treated aneurysm patients maintained on DAPT. Increasing age and aneurysmal occlusion at 6 months were the only factors predictive of nuisance bleeds. Clinicians were more likely to adjust antiplatelet regimens or stop DAPT early given a nuisance bleed.