Thrombectomy appears to be safe and feasible in patients with acute ischemic stroke due to LVO meeting all DAWN trial criteria but treated beyond 24 hours of TLKW with outcomes comparable to patients in the DAWN trial intervention arm. Further studies are warranted to validate these findings.

BackgroundTreatment of acute cerebrovascular pathology, such as acute ischemic stroke or intracranial aneurysms, presents a challenge if an extracranial or intracranial stent is required; immediate platelet inhibition is vital. To date, there is no standardized approach for antiplatelet inhibition in an acute setting.ObjectiveTo report our preliminary experience and lessons learnt using cangrelor in acute neurointervention.MethodsA single-arm pilot study was performed to assess the safety and efficacy of cangrelor plus aspirin for platelet inhibition in patients who require acute stenting in the setting of neuroendovascular treatment.ResultsEight patients were enrolled between October 2017 and August 2018. Median age was 71 years (53–86). Seven patients were treated in an acute setting according to the stroke protocol at our institution, while one patient was treated for a symptomatic, unruptured aneurysm with flow diversion and coiling. At admission, the median National Institutes of Health Stroke Scale score for the patients with stroke was 12.5 (range 2–22.3). Cangrelor was infused and all patients achieved adequate platelet inhibition (<200 PRU (P2Y12 reaction units)). Six of seven patients with ischemic stroke had a carotid stent placed and one had an intracranial stent deployed in the middle cerebral artery. None of the patients experienced intraprocedural thromboembolic complications, intraprocedural in-stent thrombosis, hemorrhagic complications, or stroke within 24 hours after the intervention. The majority of patients (6/8) had a good clinical outcome at discharge (modified Rankin Scale score 0–2).ConclusionsOur findings suggest that cangrelor is a promising alternative in acute stenting for the treatment of cerebrovascular pathology. However, further studies with larger samples are required to accurately elucidate its safety and effectiveness in neuroendovascular procedures.

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The use of simulators has been described in a variety of fields as a training tool to gain technical skills through repeating and rehearsing procedures in a safe environment. In cerebrovascular surgery, simulation of skull base approaches has been used for decades. The use of simulation in neurointervention to acquire and enhance skills before treating a patient is a newer concept, but its utilization has been limited due to the lack of good models and deficient haptics. The advent of 3D printing technology and the development of new training models has changed this landscape. The prevalence of aneurysms in the pediatric population is much lower than in adults, and concepts and tools sometimes have to be adapted from one population to another. Neuroendovascular rehearsal is a valid strategy for the treatment of complex aneurysms, especially for the pediatric population. The authors present the case of an 8-year-old boy with a fusiform intracranial aneurysm and documented progressive growth, who was successfully treated after the authors rehearsed the placement of a flow diverter using a patient-specific 3D-printed replicator system model.