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In-stent restenosis after vertebral artery origin stenosis stenting: a nomogram for risk assessment
Conclusions A nomogram and a risk evaluation table were developed with good predictive ability for in-stent restenosis among patients with VAOS, which could serve as a practical approach for individualized risk evaluation.
Source: Journal of NeuroInterventional Surgery - August 29, 2023 Category: Neurosurgery Authors: Yang, K., Fang, S., Zhang, X., Wang, T., Feng, Y., Jiao, L., Yan, Y. Tags: Ischemic stroke Source Type: research

P149/163 A comparative in vitro study of manual and robot-assisted mechanical thrombectomy
ConclusionIn experimental bench conditions, robot-assisted EVT performed by experienced neurointerventionalists is feasible and highly effective without inducing substantial procedural delays.Disclosure of InterestMR received research funding from Medtronic andVesalioMR declares ownership of Anaconda Biomed and Methinks shares. MR received consulting fees from Anaconda Biomed, Apta Targets, Medtronic, Stryker,Cerenovus, and Philips. AT reports receiving consulting fees from Anaconda Biomed,Balt, Medtronic, MicroVention, Cerus, Merlin Medical, and Stryker.
Source: Journal of NeuroInterventional Surgery - August 21, 2023 Category: Neurosurgery Authors: Tomasello, A., Li, J., Tiberi, R., Rivera, E., Vargas, J. D., Losada, C., Diaz, L., Jablonska, M., Cendrero, J., Hernandez, D., Ribo, M. Tags: 2.3 ISCHEMIC - Treatment Source Type: research

P165/237 Development and Validation of a novel stenosis model for percutaneous transluminal angioplasty training
ConclusionThe authors propose a novel ICA stenosis simulation model for training of PTA.The model provides a realistic and replicable method for standardized procedural training.Disclosure of InterestNothing to disclose
Source: Journal of NeuroInterventional Surgery - August 21, 2023 Category: Neurosurgery Authors: Ramdani, N., Anna, K., Tuan, N., Jonte, S., Dieter, K., Fabian, F., Lukas, M., Jens, F., Maxim, B., Helena, G. Tags: 2.3 ISCHEMIC - Treatment Source Type: research

O32/312 Continuous evaluation of the ESMINT/EYMINT E-fellowship as a European tele-learning network for neurointerventional trainees
ConclusionTele-observerships may supplement neurointerventional hands-on training in particular of low-frequency high-complexity procedures.Disclosure of InterestMatthias Bechstein: Nothing to discloseHelena Guerreiro: Nothing to discloseTeresa Nawka: Nothing to discloseVladimir Kalousek: Nothing to discloseJens Fiehler: Nothing to discloseUta Hanning: Nothing to disclose.
Source: Journal of NeuroInterventional Surgery - August 21, 2023 Category: Neurosurgery Authors: Bechstein, M., Guerreiro, H., Nawka, M. T., Kalousek, V., Fiehler, J., Paula Hanning, U. M. Tags: 3.3 OTHER - Miscellaneous Source Type: research

E-161 Transradial arterial access for neurointervention: the basics, benefits, and tools
Transradial access (TRA) is a feasible method for interventional neurovascular procedures, gaining popularity after becoming the standard access route in cardiovascular interventions. While advantages of TRA include better safety, cost reduction, and patient experience, barriers include a narrow variety of dedicated equipment for radial to neurovascular target vessels, need for further training for physicians and fellows, and physician bias toward Transfemoral access (TFA) due to training and familiarity.This educational poster focuses on the general technical details of TRA, including discussion of the TRA and distal TRA ...
Source: Journal of NeuroInterventional Surgery - July 30, 2023 Category: Neurosurgery Authors: Kelly, C., Abbas, M., Harris, D., Abbas, M., Luqman, A. Tags: SNIS 20th annual meeting electronic poster abstracts Source Type: research

E-186 Assessing congruency of first pass effect on outcomes in mechanical thrombectomy for large vessel occlusions via unsupervised machine learning
This study was approved by the local institutional review board (IRB). Clustered outcomes to formulate clusters included the number of passes, the final reperfusion obtained, the discharge NIHSS, and complications. FPE was defined as TICI 2C or 3 reperfusions on the first pass. Uniform manifold approximations and projections (UMAP) and K-means unsupervised clustering were done to identify outcome clusters. Logistic regression with and without interaction coefficients was used to determine associated factors with cluster membership or FPE. P-values less than 0.05 were considered significant.Results287 consecutive patients w...
Source: Journal of NeuroInterventional Surgery - July 30, 2023 Category: Neurosurgery Authors: Catapano, J., Naik, A., Koester, S., Singh, R., Ostinnington, H., Rangel, I., Desai, S., Winkler, E., Ducruet, A., Albuquerque, F., Jadhav, A. Tags: SNIS 20th annual meeting electronic poster abstracts Source Type: research

E-223 Improved time to diagnosis with portable MR imaging
ConclusionPortable MRI is a promising innovation with the aim to expand patient access and improve diagnostic times so that critical and potential lifesaving imaging diagnoses can be promptly treated with the urgency that is required. While initial analysis provides evidence that portable MRI has advantages over conventional MRI systems including workflow efficiency and improved patient imaging times, this will need to be compared to the unfortunate negative drawbacks of lessened image resolution and limited imaging sequences that come with the convenience of portable MRI systems. If the hypothesis is further corroborated,...
Source: Journal of NeuroInterventional Surgery - July 30, 2023 Category: Neurosurgery Authors: Richardson, O., Richardson, A., Mukherjee, S. Tags: SNIS 20th annual meeting electronic poster abstracts Source Type: research

P-008 Probabilistic ensemble learning for prediction of stroke thrombectomy outcomes from the neurovascular quality initiative-quality outcomes database (NVQI-QOD) registry
ConclusionsThis study demonstrates the utility of probabilistic ensemble learning in clinical decision-making and prognosis. It can provide robust predictions as well as quantify data uncertainty. Our results regarding NIHSS changes reinforce the substantial benefits of MT, that can improve outcomes in nearly half of patients. The degree of disability relevant to the 90-day follow-up mRS can be determined by probabilistic learning available as early as discharge.Disclosures C. Zhou: None. S. Faruqui: None. A. Patel: None. R. Abdalla: None. A. Shaibani: None. M. Potts: None. B. Jahromi: None. S. Ansari: None. D. Cantrell: None.
Source: Journal of NeuroInterventional Surgery - July 30, 2023 Category: Neurosurgery Authors: Zhou, C., Faruqui, S., Patel, A., Abdalla, R., Shaibani, A., Potts, M., Jahromi, B., Ansari, S., Cantrell, D. Tags: SNIS 20th annual meeting oral poster abstracts Source Type: research

Automated detection of arterial landmarks and vascular occlusions in patients with acute stroke receiving digital subtraction angiography using deep learning
Conclusion These results may serve as an unbiased standard for clinical stroke trials, as optimal standardization would be useful for core laboratories in endovascular thrombectomy studies, and also expedite decision-making during DSA-based procedures.
Source: Journal of NeuroInterventional Surgery - May 16, 2023 Category: Neurosurgery Authors: Khankari, J., Yu, Y., Ouyang, J., Hussein, R., Do, H. M., Heit, J. J., Zaharchuk, G. Tags: Ischemic stroke Source Type: research

Prediction of bleb formation in intracranial aneurysms using machine learning models based on aneurysm hemodynamics, geometry, location, and patient population
Conclusions Based on the premise that aneurysm characteristics prior to bleb formation resemble those derived from vascular reconstructions with their blebs virtually removed, machine learning models can identify aneurysms prone to bleb development with good accuracy. Pending further validation with longitudinal data, these models may prove valuable for assessing the propensity of IAs to progress to vulnerable states and potentially rupturing.
Source: Journal of NeuroInterventional Surgery - September 14, 2022 Category: Neurosurgery Authors: Salimi Ashkezari, S. F., Mut, F., Slawski, M., Cheng, B., Yu, A. K., White, T. G., Woo, H. H., Koch, M. J., Amin-Hanjani, S., Charbel, F. T., Rezai Jahromi, B., Niemelä, M., Koivisto, T., Frosen, J., Tobe, Y., Maiti, S., Robertson, A. M., Cebral, Tags: Hemorrhagic stroke Source Type: research

O13 School of thrombectomy - a 3-step approach to perform acute stroke treatment with simulator training and virtual supervision by remote streaming support (RESS)
ConclusionsThe 3-step approach increases the level of safety, as reported by the trainees and supervisor in this study, and may enable an accelerated training of neurointerventionalists.ReferencesKreiser K, Ströber L, Gehling KG, Schneider F, Kohlbecher S, Schulz CM, et al. Simulation Training in Neuroangiography—Validation and Effectiveness. Clinical Neuroradiology. 2021;31(2):465–73.Martínez-Galdámez M, Fernández JG, Arteaga MS, Pérez-Sánchez L, Arenillas JF, Rodríguez-Arias C, et al. Smart Glasses Evaluation during the Covid-19 Pandemic: First-use on Neuroint...
Source: Journal of NeuroInterventional Surgery - August 29, 2022 Category: Neurosurgery Authors: Dorn, F., Lehnen, N., Lagkomi, A., Schievelkamp, A., Bode, F., Radbruch, A., Paech, D. Tags: 14th Congress of the European Society of Minimally Invasive Neurological Therapy 2022 Meeting Abstracts Source Type: research

O16 Mechanical thrombectomy practices in Europe: results from an international survey from the ESMINT society
ConclusionsThis European survey emphasizes the variety of practices regarding thrombectomy at the level of countries, centers and across practitioners. Even if most centers remain understaffed to ensure actual and future needs for MT, most of TCSC are actively training young INR.ReferencesGoyal, Mayank et al. "Endovascular Thrombectomy after Large-vessel Ischaemic Stroke: A Meta-analysis of Individual Patient Data from Five Randomised Trials."Lancet (London, England) Vol. 387,10029 (2016): 1723–31. DOI:10.1016/S0140-6736(16)00163-X Do you have any conflict of interest to declare?: No
Source: Journal of NeuroInterventional Surgery - August 29, 2022 Category: Neurosurgery Authors: Forestier, G., Kaesmacher, J., Boulouis, G., Hanning, U., Zelenak, K., Januel, A., Kulczar, Z., Fiehler, J., Rouchaud, A., ESMINT Research Committee, EYMINT Collaborative Group Tags: 14th Congress of the European Society of Minimally Invasive Neurological Therapy 2022 Meeting Abstracts Source Type: research

P53 ESMINT/EYMINT E-fellowship - experiences from two seasons and implications for future neurointerventional tele-observerships
ConclusionsTele-observerships may facilitate location-independent training of complex neurointerventional procedures through high levels of situational awareness. Future programs will have to incorporate individual training schedules to enable fellows to better attend complex elective procedures.ReferencesBechstein M, Elsheikh S, Wodarg F, et al. Republished: Interhospital Teleproctoring of Endovascular Intracranial Aneurysm Treatment Using a Dedicated Live-streaming Technology: First Experiences during the Covid-19 Pandemic. J Neurointerv Surg 2021;13(2):E1.Bechstein M, Buhk JH, Frolich AM, et al. Training and Supervision...
Source: Journal of NeuroInterventional Surgery - August 29, 2022 Category: Neurosurgery Authors: Bechstein, M., Hanning, U., Martinez-Galdamez, M., Kalousek, V., Fiehler, J., Guerreiro, H. Tags: 14th Congress of the European Society of Minimally Invasive Neurological Therapy 2022 Meeting Abstracts Source Type: research

P74 Keep it simple: MAC (Manual Aspiration with Contrast) technique for the endovascular management of acute ischemic stroke (LVO & MVO)
We report a prospectively collected clinical experience with a simple technique: MAC (Manual Aspiration Contrast Enhancement) as the primary method for vessel recanalization.Gently contrast injection while the aspiration catheter is advancedto the thrombus and subsequentlycreating a closed-loop system with the contrast column within the cathetercan result in better visualization during the aspiration, thus improving the FPEavoiding clot fragmentation, multiple passes and blind movements of catheter by a single operator.Methods47 prospectively patients with ELVO and 3 cases of middle vessel occlusion (MVO) at four instituti...
Source: Journal of NeuroInterventional Surgery - August 29, 2022 Category: Neurosurgery Authors: Pabon, B., Torres, V., Patino, M., Pelaez, F., Mutis, J. Tags: 14th Congress of the European Society of Minimally Invasive Neurological Therapy 2022 Meeting Abstracts Source Type: research

P81 Novel synthetic clot analogs for in-vitro stroke modelling
ConclusionSelected synthetic clots can successfully be implemented in an in-vitro training environment of mechanical thrombectomy. The clots’ different properties might serve to mimic fibrin-rich and red blood cell human thrombi.ReferencesNadine Wortmann, Thomas Andersek, Helena Guerreiro, et al. Development of Synthetic Thrombus Models to Simulate Stroke Treatment in a Physical Neurointerventional Training Model, All Life 2022;15:1, 283–301, DOI:10.1080/26895293.2022.2046181Spallek J, Kuhl J, Wortmann N, et al. Design for Mass Adaptation of the Neurointerventional Training Model Hannes with Patient-specific An...
Source: Journal of NeuroInterventional Surgery - August 29, 2022 Category: Neurosurgery Authors: Guerreiro, H., Wortmann, N., Andersek, T., Ngo, T., Frölich, A., Krause, D., Fiehler, J., Kyselyova, A., Flottmann, F. Tags: 14th Congress of the European Society of Minimally Invasive Neurological Therapy 2022 Meeting Abstracts Source Type: research

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