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Start Over Author "Kocer, Naci" Journal journal of neurointerventional surgery
14 results on '"Kocer, Naci"'

1. Safety and Efficacy of Flow Diverters for Treatment of Unruptured Anterior Communicating Artery Aneurysms: Retrospective Multicenter Study

Author

Benalia, Victor H C, primary, Cortez, Gustavo M, additional, Mounayer, Charbel, additional, Saatci, Isil, additional, Cekirge, H Saruhan, additional, Kocer, Naci, additional, Islak, Civan, additional, Dabus, Guilherme, additional, Brinjikji, Waleed, additional, Baltacioglu, Feyyaz, additional, Pereira, Vitor M, additional, Nishi, Hidehisa, additional, Siddiqui, Adnan H, additional, Monteiro, Andre, additional, Lopes, Demetrius K, additional, Aghaebrahim, Amin, additional, Sauvageau, Eric, additional, and Hanel, Ricardo A, additional

Published
2023
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2. Counterpoint: The important educational value of live surgical broadcasts

Author

Lopes, Demetrius Klee, primary, Hanel, Ricardo A, additional, Levy, Elad I, additional, Cekirge, H Saruhan, additional, Lylyk, Pedro, additional, Saatci, Isil, additional, Liu, Jianmin, additional, Kocer, Naci, additional, Mounayer, Charbel, additional, Kizilkilic, Osman, additional, Moret, Jacques, additional, Spelle, Laurent, additional, Chapot, René, additional, Islak, Civan, additional, Goel, Gaurav, additional, Yang, Pengfei, additional, Berdikhojayev, Mynzhylky, additional, Orlov, Kirill, additional, and Siddiqui, Adnan H, additional

Published
2023
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3. World Federation of Interventional and Therapeutic Neuroradiology (WFITN) Federation Assembly neurointerventional surgery safety checklist

Author

Chen, Michael, primary, Fargen, Kyle M, additional, Mocco, J, additional, Siddiqui, Adnan H, additional, Miyachi, Shigeru, additional, Mahadevan, Jeyaledchumy, additional, Na Ayudya, Sirintara Singhara, additional, Churojana, Anchalee, additional, Chryssidis, Steve, additional, De Villiers, Laetitia, additional, Rahman, Mohibur, additional, Dey, Subash Kanti, additional, Zhang, Hongqi, additional, Wang, Donghai, additional, Petrocelli, Sergio, additional, Garbugino, Silvia, additional, Kulcsar, Zsolt, additional, Januel, Anne, additional, Kocer, Naci, additional, Manfre, Luigi, additional, Tanaka, Michihiro, additional, Matsumaru, Yuji, additional, Suh, Sang Hyun, additional, Yoon, Woong, additional, de Freitas, Carlos, additional, Mont’Alverne, Francisco, additional, Desal, Hubert, additional, Caroff, Jildaz, additional, Lee, Wickly, additional, Anil, Gopinathan, additional, Harrichandparsad, Rohen, additional, LeFeuvre, David, additional, Agid, Ronit, additional, Orbach, Darren B, additional, and Taylor, Allan, additional

Published
2023
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4. Magnetic resonance perfusion imaging findings following flow diversion in patients with complex middle cerebral artery bifurcation aneurysms: a single-center analysis regarding the jailed cortical branches

Author

Korkmazer, Bora, Karaman, Ahmet Kursat, Ustundag, Ahmet, Arslan, Serdar, Kızılkılıc, Osman, Kocer, Naci, and Islak, Civan

Abstract

BackgroundFlow diverter (FD) devices provide a safe and effective treatment option especially for wide-necked intracranial aneurysms. One of the main concerns in patients treated with FD devices is patency of arterial branches jailed by the stent. However, there are no long-term data from magnetic resonance perfusion (MRP) studies regarding jailed branches. In this study we aimed to reveal the MRP findings in patients with jailed middle cerebral artery (MCA) cortical branches during long-term follow-up after flow diversion.MethodsPatients who underwent FD stent treatment for MCA aneurysms with a resulting jailed cortical branch were included. Follow-up clinical, angiographic, and MRP examination findings were recorded. Different MRP parameters were measured in the MCA territory regarding the jailed branches.ResultsEighteen patients treated endovascularly with flow diversion for a total of 20 MCA aneurysms were included. At angiographic follow-up (median 35 months, range 7–95 months) complete occlusion was observed in 13 (65%) aneurysms and partial occlusion was observed in 6 (30%). The mean transit time (MTT) prolongation, MTT ratio, time-to peak (TTP) prolongation, and TTP ratio were 1.34, 1.20, 1.18, and 1.06 s, respectively, when compared with the contralateral side in the MCA territory. MTT, TTP, and cerebral blood volume values of the patients showed statistically significant differences compared with the contralateral side (P<0.05).ConclusionsFlow diversion treatment of complex bifurcation aneurysms can be effective and safe. MRP examination may reveal perfusion changes in the territory vascularized via a jailed branch, and these changes are rarely accompanied by clinical findings.

Published
2024
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6. Endovascular management of anterior falcotentorial dural arteriovenous fistulas: importance of functionality of deep venous system and existence of accompanying choroidal arteriovenous malformation.

Author

Islak, Civan, Bagcilar, Omer, Nacar Dogan, Sebahat, Korkmazer, Bora, Arslan, Serdar, Kizilkilic, Osman, and Kocer, Naci

Subjects
PATIENT aftercare, MAGNETIC resonance angiography, CEREBRAL angiography, BLOOD vessels, CEREBRAL circulation, RETROSPECTIVE studies, SURGICAL complications, MAGNETIC resonance imaging, THERAPEUTIC embolization, ARTERIOVENOUS fistula, CEREBRAL arteries, TREATMENT effectiveness, POSTERIOR cerebral artery, DESCRIPTIVE statistics, ENDOVASCULAR surgery, COMPUTED tomography, ARTERIOVENOUS malformation
Abstract

Background Anterior falcotentorial junction dural arteriovenous fistulas (AFDAVFs) are the most deeply located and most complex type of tentorial fistula due to their location and vascular anatomy. We aimed to make new angiographic definitions of AFDAVF nidus and functionality of the deep venous system of the brain and thereby provide a safer approach for endovascular treatment. Methods We retrospectively examined 18 patients with AFDAVF who received endovascular treatment at our neuroradiology department between June 2002 and May 2019. Pre- and post-treatment clinical assessments were performed using the modified Rankin Scale. AFDAVF niduses were defined as mixed- type or pure- duraltype on the basis of whether choroidal arteriovenous malformation was coexisting or not, respectively. The deep venous system was denoted as functional or nonfunctional. Results We included 13 men and 5 women (mean (range) age, 47.2 (31-62) years). We evaluated 15 patients with pure-dural-type AFDAVFs and three with mixed-type AFDAVFs. Complete occlusion of the fistula was achieved in 15/18 patients. Three patients had transient neurologic symptoms. In two patients these were due to mild thalamic ischemia and in the third patient was due to tectal venous ischemia, all in mixedtype AFDAVF. One patient also developed Parinaud syndrome due to compression of the tectal plate by a thrombosed large vein of Galen. No patients died or developed permanent morbidity. Conclusion Evaluating AFDAVFs as described here using our new subtyping model will help improve analysis of the malformation and development of a safer endovascular strategy, and hence may prevent periprocedural complications and improve treatment safety. [ABSTRACT FROM AUTHOR]

Published
2022
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7. Comparison of PED and FRED flow diverters for posterior circulation aneurysms: a propensity score matched cohort study

Author

Griessenauer, Christoph J, primary, Enriquez-Marulanda, Alejandro, additional, Xiang, Sissi, additional, Hong, Tao, additional, Zhang, Hongqi, additional, Taussky, Philipp, additional, Grandhi, Ramesh, additional, Waqas, Muhammad, additional, Tutino, Vincent M, additional, Siddiqui, Adnan H, additional, Levy, Elad I, additional, Ogilvy, Christopher S, additional, Thomas, Ajith J, additional, Ulfert, Christian, additional, Möhlenbruch, Markus A, additional, Renieri, Leonardo, additional, Limbucci, Nicola, additional, Parra-Fariñas, Carmen, additional, Burkhardt, Jan-Karl, additional, Kan, Peter, additional, Rinaldo, Lorenzo, additional, Lanzino, Giuseppe, additional, Brinjikji, Waleed, additional, Spears, Julian, additional, Müller-Thies-Broussalis, Erasmia, additional, Killer-Oberpfalzer, Monika, additional, Islak, Civan, additional, Kocer, Naci, additional, Sonnberger, Michael, additional, Engelhorn, Tobias, additional, Ghuman, Mandeep, additional, Yang, Victor XD, additional, Salehani, Arsalaan, additional, Harrigan, Mark R, additional, Radovanovic, Ivan, additional, Pereira, Vitor M, additional, Krings, Timo, additional, Matouk, Charles C, additional, Chen, Karen, additional, Aziz-Sultan, Mohammad Ali, additional, Ghorbani, Mohammad, additional, Schirmer, Clemens M, additional, Goren, Oded, additional, Dalal, Shamsher S, additional, Koch, Matthew J, additional, Stapleton, Christopher J, additional, Patel, Aman B, additional, Finkenzeller, Thomas, additional, Holtmannspötter, Markus, additional, Buhk, Jan Hendrik, additional, Foreman, Paul Michael, additional, Cress, Marshall, additional, Hirschl, Robert, additional, Reith, Wolfgang, additional, Simgen, Andreas, additional, Janssen, Hendrik, additional, Marotta, Thomas R, additional, and Dmytriw, Adam A, additional

Published
2020
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8. First clinical multicenter experience with the new Scepter Mini microballoon catheter

Author

Vollherbst, Dominik F, primary, Chapot, René, additional, Wallocha, Marta, additional, Saatci, Isil, additional, Cekirge, Saruhan, additional, Rouchaud, Aymeric, additional, Mounayer, Charbel, additional, Kocer, Naci, additional, Kizilkilic, Osman, additional, Sourour, Nader A, additional, Shotar, Eimad, additional, Psychogios, Marios N, additional, Brehm, Alex, additional, Bendszus, Martin, additional, and Möhlenbruch, Markus A, additional

Published
2020
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9. Long-term safety and efficacy of distal aneurysm treatment with flow diversion in the M2 segment of the middle cerebral artery and beyond.

Author

Cimflova, Petra, Özlük, Enes, Korkmazer, Bora, Ahmadov, Ramiz, Akpek, Elif, Kizilkilic, Osman, Islak, Civan, and Kocer, Naci

Subjects
CEREBRAL artery surgery, INTRACRANIAL aneurysm surgery, SURGICAL stents, RETROSPECTIVE studies, SURGICAL complications, DISEASES, VASCULAR surgery, TREATMENT effectiveness, DESCRIPTIVE statistics, PATIENT safety, INTRACRANIAL aneurysms
Abstract

Background Indications for flow diversion stent (FDS) treatment are expanding. However, there is still a lack of evidence for the long-term outcome in distally located aneurysms in the M2 segment of the middle cerebral artery (MCA) and beyond. Methods Consecutive subjects (from June 2013 to August 2020) with MCA aneurysms in the M2 segment or beyond treated with FDS were reviewed retrospectively. The primary endpoints for clinical safety were the absence of mortality, stroke event, re-rupture of the aneurysm, and worsening of clinical symptoms. The primary endpoint for treatment efficacy was complete/near-complete occlusion at follow-up after 12 months. Results 23 patients were identified: 7 aneurysms were located in the M2 segment of the MCA, 4 in the M2-M3 bifurcation, 2 in M3, 3 in M3-4 branching, and 2 in M4; 5 aneurysms were located in M2 with extension into the M1-M2 bifurcation. 13 aneurysms were of fusiform morphology, 8 sacculofusiform, and 2 saccular. 16 aneurysms were of highly suspected dissecting etiology. The median diameter of the parent vessel was 2.1 mm proximally and 2 mm distally. The median time of the follow-up was 30 months (range 16 months to 6 years). Complete/near complete occlusion was observed in 14/20 patients (70%) and one stable remodeling (5%) was seen at 12 months. 22 patients (95.6%) had an excellent clinical outcome (mRS 0-1) at 6 months. Technical challenges associated with the deployment of FDS occurred in 8.7% of cases. Severe complications, intraparenchymal hemorrhage and re-rupture of the aneurysm occurred in 2 patients (8.7%). Conclusion Flow diversion of distally located aneurysms is technically feasible with low morbidity and mortality. [ABSTRACT FROM AUTHOR]

Published
2021
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10. Standards for European training requirements in interventional neuroradiology guidelines by the Division of Neuroradiology/Section of Radiology European Union of Medical Specialists (UEMS), in cooperation with the Division of Interventional Radiology/UEMS, the European Society of Neuroradiology (ESNR), and the European Society of Minimally Invasive Neurological Therapy (ESMINT)

Author

Sasiadek, Marek, primary, Kocer, Naci, additional, Szikora, Istvan, additional, Vilela, Pedro, additional, Muto, Mario, additional, Jansen, Olav, additional, Causin, Francesco, additional, Cognard, Christophe, additional, White, Phil, additional, Brouwer, Patrick, additional, Pizzini, Francesca, additional, Schroth, Gerhard, additional, and Ricci, Paolo, additional

Published
2019
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11. First clinical multicenter experience with the new Scepter Mini microballoon catheter.

Author

Vollherbst, Dominik F., Chapot, René, Wallocha, Marta, Saatci, Isil, Cekirge, Saruhan, Rouchaud, Aymeric, Mounayer, Charbel, Kocer, Naci, Kizilkilic, Osman, Sourour, Nader A., Shotar, Eimad, Psychogios, Marios N., Brehm, Alex, Bendszus, Martin, and Möhlenbruch, Markus A.

Subjects
BLOOD-vessel abnormalities, ENDOVASCULAR surgery, CEREBRAL angiography, CATHETERIZATION, CEREBRAL circulation, CEREBROVASCULAR disease, MEDICAL cooperation, RESEARCH, THERAPEUTIC embolization, RETROSPECTIVE studies, MEDICAL equipment reliability, ADVERSE health care events, ARTERIOVENOUS malformation
Abstract

Background Balloon-assisted techniques can improve the endovascular treatment of cerebrospinal vascular malformations. The aim of this study was to report the first clinical multicenter experience with the new Scepter Mini dual-lumen microballoon catheter. Methods Patients with cerebral or spinal vascular malformations treated with the Scepter Mini at seven European neurovascular centers were retrospectively reviewed. Clinical data, angiographic features of the vascular malformations, procedural parameters including the type of application, navigability, technical failures, complications and embolization success were assessed. Results The usage of 34 Scepter Mini microballoon catheters in 20 patients was analyzed. Most treated malformations (80.0%) were cerebral arteriovenous malformations. Four different applications were reported: embolization via Scepter Mini (n=23, 67.6%), balloon-occlusion with simultaneous embolization via a second microcatheter (n=3, 8.8%), diagnostic angiography with simultaneous balloon-inflation for flow arrest (n=4, 11.8%), and navigation support (n=4, 11.8%). The mean diameter of the blood vessels in which the Scepter Mini was inflated was 1.9±0.5 mm. The navigability of the Scepter Mini was rated as 'easy' or 'very easy' in 88.2% of cases. Complete occlusion of the malformation was achieved in 60.9% of cases. Technical failures occurred in 4/23 embolization procedures, and all were related to insufficient stability of the balloon within the vessel. No complications related to the Scepter Mini were observed, while unrelated complications occurred in three patients (15.0%). Conclusions The Scepter Mini is a promising new device for balloon-assisted embolization of cerebrospinal vascular malformations via small feeders. Beyond embolization, the Scepter Mini can also be used for other applications, such as superselective flow arrest and navigation support. [ABSTRACT FROM AUTHOR]

Published
2021
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12. Standards for European training requirements in interventional neuroradiology guidelines by the Division of Neuroradiology/Section of Radiology European Union of Medical Specialists (UEMS), in cooperation with the Division of Interventional Radiology/UEMS, the European Society of Neuroradiology (ESNR), and the European Society of Minimally Invasive Neurological Therapy (ESMINT).

Author

Sasiadek, Marek, Kocer, Naci, Szikora, Istvan, Vilela, Pedro, Muto, Mario, Jansen, Olav, Causin, Francesco, Cognard, Christophe, White, Phil, Brouwer, Patrick, Pizzini, Francesca, Schroth, Gerhard, and Ricci, Paolo

Subjects
CLINICAL competence, CURRICULUM, ENDOSCOPIC surgery, GOAL (Psychology), INTERNSHIP programs, MEDICAL quality control, MEDICAL practice, MEDICAL societies, MEDICAL specialties & specialists, NEURORADIOLOGY, ALLIED health education, RADIOLOGIC technologists, INTERVENTIONAL radiology, RATING of students, CERTIFICATION, GOVERNMENT regulation, ACCREDITATION
Published
2020
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13. Standards of practice in acute ischemic stroke intervention: international recommendations

Author

Pierot, Laurent, primary, Jayaraman, Mahesh V, additional, Szikora, Istvan, additional, Hirsch, Joshua A, additional, Baxter, Blaise, additional, Miyachi, Shigeru, additional, Mahadevan, Jeyaledchumy, additional, Chong, Winston, additional, Mitchell, Peter J, additional, Coulthard, Alan, additional, Rowley, Howard A, additional, Sanelli, Pina C, additional, Tampieri, Donatella, additional, Brouwer, Patrick A, additional, Fiehler, Jens, additional, Kocer, Naci, additional, Vilela, Pedro, additional, Rovira, Alex, additional, Fischer, Urs, additional, Caso, Valeria, additional, van der Worp, Bart, additional, Sakai, Nobuyuki, additional, Matsumaru, Yuji, additional, Yoshimura, Shin-ichi, additional, Anxionnat, Rene, additional, Desal, Hubert, additional, Biscoito, Luisa, additional, Pumar, José Manuel, additional, Diaz, Orlando, additional, Fraser, Justin F, additional, Linfante, Italo, additional, Liebeskind, David S, additional, Nogueira, Raul G, additional, Hacke, Werner, additional, Brainin, Michael, additional, Yan, Bernard, additional, Soderman, Mchael, additional, Taylor, Allan, additional, Pongpech, Sirintara, additional, Tanaka, Michihiro, additional, and Karel, Terbrugge, additional

Published
2018
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14. Comparison of PED and FRED flow diverters for posterior circulation aneurysms: a propensity score matched cohort study

Author

Griessenauer, Christoph J, Enriquez-Marulanda, Alejandro, Xiang, Sissi, Hong, Tao, Zhang, Hongqi, Taussky, Philipp, Grandhi, Ramesh, Waqas, Muhammad, Tutino, Vincent M, Siddiqui, Adnan H, Levy, Elad I, Ogilvy, Christopher S, Thomas, Ajith J, Ulfert, Christian, Mo¨hlenbruch, Markus A, Renieri, Leonardo, Limbucci, Nicola, Parra-Fariñas, Carmen, Burkhardt, Jan-Karl, Kan, Peter, Rinaldo, Lorenzo, Lanzino, Giuseppe, Brinjikji, Waleed, Spears, Julian, Mu¨ller-Thies-Broussalis, Erasmia, Killer-Oberpfalzer, Monika, Islak, Civan, Kocer, Naci, Sonnberger, Michael, Engelhorn, Tobias, Ghuman, Mandeep, Yang, Victor XD, Salehani, Arsalaan, Harrigan, Mark R, Radovanovic, Ivan, Pereira, Vitor M, Krings, Timo, Matouk, Charles C, Chen, Karen, Aziz-Sultan, Mohammad Ali, Ghorbani, Mohammad, Schirmer, Clemens M, Goren, Oded, Dalal, Shamsher S, Koch, Matthew J, Stapleton, Christopher J, Patel, Aman B, Finkenzeller, Thomas, Holtmannspo¨tter, Markus, Buhk, Jan Hendrik, Foreman, Paul Michael, Cress, Marshall, Hirschl, Robert, Reith, Wolfgang, Simgen, Andreas, Janssen, Hendrik, Marotta, Thomas R, and Dmytriw, Adam A

Abstract

BackgroundFlow diversion is a common endovascular treatment for cerebral aneurysms, but studies comparing different types of flow diverters are scarce.ObjectiveTo perform a propensity score matched cohort study comparing the Pipeline Embolization Device (PED) and Flow Redirection Intraluminal Device (FRED) for posterior circulation aneurysms.MethodsConsecutive aneurysms of the posterior circulation treated at 25 neurovascular centers with either PED or FRED were collected. Propensity score matching was used to control for age, duration of follow-up imaging, adjunctive coiling, and aneurysm location, size, and morphology; previously ruptured aneurysms were excluded. The two devices were compared for the following outcomes: procedural complications, aneurysm occlusion, and functional outcome.ResultsA total of 375 aneurysms of the posterior circulation were treated in 369 patients. The PED was used in 285 (77.2%) and FRED in 84 (22.8%) procedures. Aneurysms treated with the PED were more commonly fusiform and larger than those treated with FRED. To account for these important differences, propensity score matching was performed resulting in 33 PED and FRED unruptured aneurysm pairs. No differences were found in occlusion status and neurologic thromboembolic or hemorrhagic complications between the two devices. The proportion of patients with favorable functional outcome was higher with FRED (100% vs 87.9%, p=0.04).ConclusionComparative analysis of PED and FRED for the treatment of unruptured posterior circulation aneurysms did not identify significant differences in aneurysm occlusion or neurologic complications. Variations in functional outcomes warrant additional investigations.

Published
2021
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