# Professional Summary Researchers have evaluated the feasibility and safety of stand-alone stent retriever thrombectomy as a minimally invasive treatment for acute embolic mesenteric ischemia using a canine model. This study addresses a critical clinical challenge, as mesenteric ischemia caused by blood clots can be life-threatening without rapid intervention. Unlike traditional surgical approaches, stent retriever thrombectomy—a catheter-based technique already established in stroke management—offers potential advantages including reduced tissue trauma and faster revascularization. The canine model provided a physiologically relevant platform to assess whether this mechanical thrombectomy approach could safely and effectively restore blood flow to the mesenteric circulation. The research demonstrates that stand-alone stent retriever thrombectomy is both feasible and safe in this preclinical setting, suggesting potential for clinical translation. These findings could expand treatment options for acute mesenteric ischemia patients, potentially reducing morbidity and mortality associated with this vascular emergency by enabling rapid, less invasive clot removal compared to conventional open surgical interventions.

# Professional Summary This research investigates the relationship between thrombus composition and clinical outcomes in patients undergoing mechanical thrombectomy for acute ischemic stroke. The study analyzed thrombi retrieved during endovascular procedures, examining their compositional balance—specifically the proportions of different cellular and protein components within the clots. Researchers utilized specialized staining and analytical techniques to characterize thrombus composition and correlated these findings with procedural success metrics, including complete reperfusion rates and other endovascular outcomes. The analysis revealed significant associations between particular compositional balances and improved reperfusion success, with sensitivity analyses confirming the robustness of these findings. These results have important clinical implications for understanding why certain thrombi respond differently to thrombectomy interventions. By identifying compositional markers associated with better outcomes, this work may ultimately inform patient stratification strategies and help predict treatment response, potentially enabling more personalized approaches to acute stroke management and optimization of mechanical thrombectomy procedures.

Mechanical thrombectomy has revolutionized acute ischemic stroke treatment by enabling reopening of large vessels, yet angiographic success does not guarantee effective tissue-level reperfusion or oxygen delivery to brain tissue. This narrative review synthesizes literature from major databases through April 2026 to explore endothelial glycocalyx dysfunction as a critical interface linking pre-existing cardiometabolic vulnerabilities to post-thrombectomy microvascular complications. The authors examined evidence across human mechanical thrombectomy studies, biomarker analyses, imaging findings, and experimental models to elucidate how multiple stressors—including ischemic priming, reperfusion injury, oxidative stress, complement activation, and device-induced trauma—may converge on the endothelial surface. Glycocalyx dysfunction could amplify leukocyte adhesion, platelet aggregation, and blood-brain barrier destabilization, yet direct causal evidence in human mechanical thrombectomy remains absent. Circulating biomarkers such as syndecan-1, heparan sulfate, and hyaluronan represent systemic signals rather than direct cerebral glycocalyx measurements. The review emphasizes that post-thrombectomy microcirculatory rescue remains therapeutically targetable but requires integrated approaches combining compartment-specific biomarkers, advanced perfusion imaging, and tissue endpoints while accounting for individual cardiometabolic risk factors and competing microvascular mechanisms.

Researchers from Qingdao Central Hospital and Qingdao University investigated the hemodynamic environment at rupture sites in middle cerebral artery aneurysms using CT angiography-based computational fluid dynamics. The study analyzed preoperative imaging data from 15 patients with ruptured aneurysms, reconstructing three-dimensional models to simulate blood flow characteristics. Using transient CFD simulations, the team computed time-averaged wall shear stress, oscillatory shear index, pressure, and flow patterns, then compared these parameters across the rupture point, aneurysm sac, and parent artery. Results demonstrated that wall shear stress decreased significantly from the parent artery through the aneurysm sac to the rupture point, while oscillatory shear index was markedly elevated at rupture sites. Notably, pressure did not differ significantly between rupture points and the aneurysm sac. The findings indicate that low wall shear stress and high oscillatory shear index, rather than elevated pressure, characterize rupture regions. This research provides valuable insights into aneurysm rupture mechanics and may inform future strategies for identifying high-risk aneurysms and predicting rupture likelihood, potentially improving clinical decision-making for aneurysm management.

Research published recently in JAMA Neurology sought to answer whether there were significant differences in treatment outcomes of a stent retriever combined with local aspiration-based mechanical thrombectomy versus aspiration-based thrombectomy alone in large vessel occlusion (LVO) stroke. The authors performed a randomized clinical trial of 198 patients and found no significant difference in safety or effectiveness between aspiration-assisted stent retrieval and direct aspiration for stroke intervention. These findings add to the argument that treatment effects of mechanical thrombectomy devices in large-vessel acute ischemic stroke (AIS) remain unclear. Further research is needed to understand whether aspiration-assisted mechanical thrombectomy should be the standard of care for LVO, or whether reducing the number of treatment steps and using direct aspiration alone is more beneficial.

Researchers conducted a post hoc analysis of the TRACE-III trial to investigate the relationship between the neutrophil to lymphocyte ratio (NLR) and neurological outcomes in ischemic stroke patients treated within the 4.5 to 24-hour window. The neutrophil to lymphocyte ratio, a marker of systemic inflammation, was examined as a potential predictor of patient outcomes following stroke intervention during this extended treatment timeframe. This analysis is significant because it explores inflammatory biomarkers' role in determining prognosis for late-presenting stroke patients, a population that has historically presented challenges for acute intervention. By identifying correlations between NLR values and neurological recovery, the findings could inform patient stratification and help clinicians better predict which patients are most likely to benefit from treatment in the extended thrombolytic window. Understanding these relationships may ultimately improve clinical decision-making for stroke management beyond the conventional treatment window, potentially optimizing outcomes for patients who present later after symptom onset.

Researchers from Beijing Tiantan Hospital and affiliated Chinese institutions analyzed cause-specific mortality following endovascular treatment (EVT) for acute ischemic stroke caused by large vessel occlusion, examining differences between anterior and posterior circulation occlusions. The multicenter retrospective study included 1,671 patients (1,300 with anterior circulation occlusion, 371 with posterior circulation occlusion) from 111 hospitals across China, utilizing the ANGEL-ACT registry. Among participants, 228 deaths (13.6%) occurred within 90 days, with posterior circulation occlusion patients experiencing significantly higher all-cause mortality (19.4% versus 12.0%). Using the Fine-Gray subdistribution hazard model with competing risk analysis, researchers found that cerebral edema-related death was substantially more common in posterior circulation occlusion patients (9.16% versus 4.15% cumulative incidence). Fatal hemorrhagic transformation occurred more frequently in anterior circulation occlusion but did not achieve statistical significance. These findings demonstrate that location of vessel occlusion significantly influences mortality mechanisms post-EVT, suggesting treatment strategies and post-intervention monitoring may require differentiation based on circulation territory affected.

Researchers conducted a systematic review and meta-analysis comparing stent-assisted coiling with non-stent-assisted coiling for treating unruptured intracranial aneurysms, examining both clinical and angiographic outcomes. The study, published in the Egyptian Journal of Neurosurgery in October 2026, represents an important effort to clarify optimal endovascular treatment strategies for this patient population. Stent-assisted coiling involves deploying a stent alongside coil embolization to provide structural support and reduce aneurysm recurrence rates, while non-stent approaches rely solely on coil placement. By systematically analyzing existing clinical data and angiographic findings, the research aimed to establish evidence-based guidance for clinicians selecting between these techniques. This comparison matters significantly because treatment selection directly impacts patient outcomes, including aneurysm obliteration rates, recanalization risks, and procedural safety profiles. The findings help neurosurgeons and interventional radiologists make informed decisions tailored to individual patient anatomy and clinical circumstances, ultimately improving care quality for unruptured intracranial aneurysm management.

Endovascular flow diverter treatment has become a cornerstone technique for managing complex, wide-necked intracranial aneurysms that are unsuitable for traditional microsurgical clipping or standalone coiling. These braided microvascular devices redirect parent artery blood flow away from aneurysmal domes, promoting progressive thrombosis and endothelial remodeling. Recent multicenter clinical evidence now provides practitioners with granular insights into the timing of complete sac obliteration during the post-procedural period, enabling better stratification of follow-up protocols and patient-specific recovery trajectories. Flow diverters work by decreasing intra-aneurysmal shear stress through their metallic lattice structure, which disrupts inflow vortices and initiates intrinsic clotting cascades involving platelets and fibrin. The device simultaneously acts as a scaffold facilitating neointimal cell proliferation over the treated orifice. However, complete biological transformation occurs over variable timeframes, with some aneurysms thrombosing within weeks while others maintain residual perfusion for months. This understanding helps clinicians distinguish normal delayed thrombosis from construct failure and guides personalized surveillance strategies. Historically, invasive catheter-based digital subtraction angiography served as the sole reference standard, though it carries procedural risks, nephrotoxicity concerns, and radiation exposure, prompting exploration of safer alternatives.

Researchers from Hunan University of Chinese Medicine and Hunan Province Brain Hospital developed and validated the Aneurysm Endovascular Procedural Complexity Score (AEPCS) to quantify procedural burden during stent-assisted coil embolization for unruptured intracranial aneurysms. In this retrospective cohort study of 484 patients treated between January 2018 and December 2025, the AEPCS integrated procedure duration, contrast volume, and radiation index through standardized mathematical transformation. Major periprocedural complications occurred in 71 patients (14.7%), and each standard-deviation increase in the AEPCS was associated with significantly higher odds of complications (adjusted OR 5.25, P<0.001). The score demonstrated excellent discrimination with an area under the receiver operating characteristic curve of 0.846, outperforming procedure duration alone. Results remained robust in sensitivity analyses including patients requiring intraprocedural rescue treatment. The findings suggest the AEPCS serves as a reliable composite measure of cumulative procedural burden; however, external validation is necessary before clinical implementation to confirm its utility in predicting adverse outcomes during endovascular aneurysm treatment.

A new study published in Neurology Open Access reveals that in-hospital seizure rates following mechanical thrombectomy for acute ischemic stroke have risen significantly from 2016 to 2022. Analyzing 632,485 patients from the National Inpatient Sample, researchers found overall seizure rates increased from 1.60% to 2.34% over this period, with both status epilepticus and nonstatus seizures showing upward trends. Mechanical thrombectomy, a cornerstone treatment for large vessel occlusion strokes endorsed by the American Heart Association/American Stroke Association in 2015, treats patients with severe strokes involving extensive vascular territories and cortical involvement—established seizure risk factors. The study identified specific anatomical risk factors, including intracranial artery, internal carotid artery, and vertebral artery thrombectomies. Patients experiencing status epilepticus faced substantially longer hospitalizations, higher costs, and greater mortality compared to those without seizures. These findings highlight the clinical significance of seizure management in mechanical thrombectomy patients, as several identified risk factors appear potentially modifiable through early metabolic and medical optimization strategies.

Researchers conducted a comprehensive meta-analysis comparing three treatment modalities for posterior communicating artery (PCOM) aneurysms: microsurgical clipping, endovascular coiling, and flow diverter placement. Published in September 2026 in The Egyptian Journal of Neurology, Psychiatry and Neurosurgery, this open-access study systematically evaluated the efficacy and safety outcomes of these interventional approaches. PCOM aneurysms represent a significant clinical challenge, accounting for a substantial portion of cerebral aneurysms requiring treatment. The meta-analysis examined key performance metrics across all three techniques to determine their comparative effectiveness. This research matters because identifying the optimal treatment strategy for PCOM aneurysms can substantially improve patient outcomes, reduce complications, and guide clinical decision-making. By providing evidence-based comparisons of microsurgical clipping, endovascular coiling, and flow diverter technology, the findings offer valuable guidance for neurosurgeons and interventional neuroradiologists in selecting appropriate treatment protocols tailored to individual patient characteristics and anatomical considerations.

# Summary Researchers developed an integrated computational and experimental framework to assess endovascular flow diversion strategies for treating cerebral aneurysms. The study combines hemodynamic and structural analyses using multi-fidelity approaches, integrating advanced computational modeling with laboratory validation. Flow diversion devices work by redirecting blood flow away from aneurysms, promoting thrombosis and vessel healing. The multi-fidelity assessment methodology allows researchers to evaluate device performance across different complexity levels, improving prediction accuracy while optimizing computational efficiency. By correlating computational simulations with experimental data, the framework provides comprehensive insights into how various flow diversion strategies affect both blood flow patterns and structural vessel responses. This integrated approach is significant because it addresses the critical need for more accurate preoperative planning in aneurysm treatment, potentially reducing complications and improving patient outcomes. The methodology advances personalized medicine in neurointerventional radiology by enabling better-informed device selection and deployment strategies tailored to individual patient anatomies and aneurysm characteristics.

This study evaluates patient-specific hemodynamic and angiographic outcomes following flow-diverting device deployment for intracranial aneurysm treatment. Researchers developed a computational framework combining patient-specific vascular reconstruction with virtual device deployment and computational fluid dynamics modeling to predict treatment outcomes. The methodology involved three diverse clinical cases: a small sidewall saccular aneurysm, a dissecting or locally dilated vertebral artery lesion, and a giant aneurysm. The study analyzed hemodynamic changes induced by the flow-diverting device, comparing predicted computational results with actual clinical angiographic findings at immediate post-procedural assessment and twelve-month follow-up imaging. This patient-specific modeling approach demonstrates significant clinical value by enabling personalized treatment planning and predicting aneurysm response to flow diversion before intervention. The correlation between computational predictions and real-world angiographic outcomes validates the utility of this technique in optimizing endovascular strategy selection and improving patient outcomes in complex aneurysm management.

Recent research examines optimal endovascular treatment strategies for acute ischemic stroke caused by large-vessel occlusion. A meta-analysis by Bischof, Jackwerth, and Bergmann investigates whether bridging therapy combining intravenous thrombolysis with endovascular thrombectomy provides added benefit over thrombectomy alone, despite continued guideline recommendations for this combined approach. Complementary studies explore patient selection criteria, including NIHSS mismatch as a predictor of early neurological improvement following mechanical thrombectomy, and clustering analysis to identify acute ischemic stroke subtypes based on clinical and thrombus imaging characteristics. Research by Kim, Salazar-Marioni, and Sheth compares thrombectomy alone versus bridging thrombolysis specifically in US populations, while proteomic biomarker studies aim to extend treatment eligibility windows beyond the current 4.5-hour guideline for intravenous thrombolysis. These investigations collectively address critical gaps in stroke management protocols, potentially refining patient selection and treatment timing to improve neurological outcomes and optimize resource allocation in acute stroke care.

Researchers have developed an integrated computational and experimental framework for assessing hemodynamic-structural effects of endovascular flow diversion strategies in cerebral aneurysm treatment. This multi-fidelity approach combines advanced modeling techniques with laboratory validation to evaluate how flow-diverting devices alter blood flow dynamics and structural mechanics within aneurysms. The study addresses a critical clinical need by providing comprehensive analysis of device performance across multiple parameters simultaneously, rather than examining hemodynamic or structural aspects in isolation. By integrating computational simulations with experimental testing, the research enables more accurate prediction of clinical outcomes and device efficacy. This methodology allows clinicians and engineers to optimize flow diversion strategies before implementation, potentially improving patient safety and treatment success rates. The framework represents a significant advancement in precision medicine for cerebral aneurysm management, offering a systematic approach to device evaluation that bridges the gap between theoretical modeling and real-world clinical application, ultimately supporting better-informed treatment decisions for this serious cardiovascular condition.

Researchers have developed an integrated computational and experimental framework to evaluate endovascular flow diversion strategies for treating cerebral aneurysms. The study combines hemodynamic modeling with structural analysis to assess multiple treatment approaches across different fidelity levels, enabling more comprehensive evaluation of flow diverter device performance. By merging computational fluid dynamics simulations with experimental validation, the team created a multi-fidelity assessment methodology that captures both the fluid dynamics within aneurysms and the structural interactions of implanted devices. This approach allows for systematic comparison of various flow diversion strategies before clinical application. The framework addresses a critical gap in aneurysm treatment research by providing detailed hemodynamic and structural insights that single-method approaches cannot achieve. This integrated methodology is significant for advancing endovascular treatment protocols, optimizing device design, and potentially improving patient outcomes by identifying the most effective flow diversion strategies. The research supports evidence-based selection of treatment approaches tailored to specific aneurysm characteristics, ultimately enhancing the safety and efficacy of cerebral aneurysm management.

# Summary This case report documents the successful recovery of oculomotor nerve palsy following endovascular treatment of a complex basilar artery–superior cerebellar artery junction aneurysm using the Woven EndoBridge (WEB) device. The patient presented with symptoms related to nerve compression from the aneurysm at this critical neurovascular junction. The WEB device, a specialized intrasaccular flow disruptor, was deployed to treat the symptomatic aneurysm while preserving vessel patency. Following the procedure, the patient experienced progressive neurological improvement, with complete resolution of oculomotor nerve dysfunction. This case illustrates an important clinical outcome demonstrating that the WEB technique can effectively treat complex aneurysms at challenging locations while potentially reversing associated neurological deficits. The recovery of cranial nerve function post-intervention highlights the device's capability to relieve mass effect and compression, offering patients improved functional outcomes beyond traditional aneurysm obliteration alone.

# Summary This open-access clinical research article, published in BMC Neurology in October 2026, evaluates the effectiveness and safety of endovascular stent-assisted coil embolization for treating cerebral aneurysms. The study presents 12-month clinical outcomes following this minimally invasive intervention, which combines stent placement with coil embolization to achieve durable aneurysm occlusion while preserving parent vessel patency. The research contributes important data on this increasingly prevalent treatment approach, which offers advantages over traditional open surgical clipping, particularly for complex aneurysm morphologies. By documenting patient outcomes over an extended follow-up period, the study provides evidence regarding complication rates, aneurysm recurrence, and functional recovery. These findings are significant for neurovascular specialists and interventional radiologists selecting treatment strategies for aneurysm patients, helping establish best practices for stent-assisted coiling techniques and informing clinical decision-making in aneurysm management protocols.

Endovascular thrombectomy has revolutionized acute ischemic stroke treatment, yet approximately twenty percent of procedures encounter refractory vessel occlusions requiring alternative management strategies. When mechanical retrieval fails, clinicians must decide whether to abandon intervention or pursue salvage techniques, with intracranial rescue stenting emerging as a critical bailout option. Historically, concerns about hemorrhagic transformation and acute in-stent thrombosis limited adoption of this approach. The German Stroke Registry-Endovascular Treatment provided landmark real-world evidence by analyzing over fourteen thousand middle cerebral artery occlusion patients. Among these, rescue stenting was deployed in only 2.4 percent of cases, reflecting its selective use. Researchers conducted rigorous propensity score matching comparing 218 stented patients with 218 non-stented controls who had failed reperfusion, accounting for baseline neurological severity, age, and vascular anatomy. Results demonstrated that patients receiving intracranial rescue stenting achieved significantly improved functional outcomes at ninety days. This data provides crucial guidance for interventional teams facing the difficult decision of persistent vessel occlusion versus aggressive salvage maneuvers, suggesting rescue stenting offers meaningful clinical benefit in carefully selected failed thrombectomy cases.