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  1. Article ; Online: Comprehensive Risk Analysis of the Wingspan Stent in Relation to Target Vessels.

    Yamaga, Hiroo / Tsuboko, Yusuke / Terada, Tomoaki / Iwasaki, Kiyotaka

    Journal of neuroendovascular therapy

    2022  Volume 16, Issue 9, Page(s) 458–466

    Abstract: Objective: To facilitate understanding for the safe use of the Wingspan stent, a comprehensive literature analysis was conducted, and incidence rates of 30-day stroke or death before and after the Stenting versus Aggressive Medical Management for ... ...

    Abstract Objective: To facilitate understanding for the safe use of the Wingspan stent, a comprehensive literature analysis was conducted, and incidence rates of 30-day stroke or death before and after the Stenting versus Aggressive Medical Management for Preventing Recurrent Stroke in Intracranial Stenosis (SAMMPRIS) trial were compared. We also investigated the associations between 30-day stroke or death rate and four lesion vessels, the internal carotid artery (ICA), middle cerebral artery (MCA), basilar artery (BA), and vertebral artery (VA).
    Methods: We searched MEDLINE, Embase, Web of Science, and Cochrane Library databases. The incidence rates of 30-day stroke or death in pre- and post-SAMMPRIS were compared using forest plots and funnel plots.
    Results: Thirty studies (15 before and 15 after the SAMMPRIS) were identified, comprising 2071 patients. Post-SAMMPRIS studies showed lower incidence rates of 30-day stroke or death compared to the pre-SAMMPRIS studies (8.5% vs. 5.6%, p = 0.014). The odds ratio of 30-day stroke or death of the post-SAMMPRIS group compared to that of the pre-SAMMPRIS group was 0.64 (95% confidence interval: 0.45-0.92, p = 0.014). The average 30-day stroke or death rates of overall, pre-, and post-SAMMPIS studies were 1.1%, 1.1%, and 1.1% for ICA; 6.2%, 8.8%, and 5.3% for MCA; 0.9%, 6.0%, and 2.7% for VA; and 13.5%, 15.1%, and 12.5% for BA, respectively. The post-SAMMPRIS study group showed significantly lower event rates for the treatment of MCA and VA than the pre-SAMMPRIS group did (p = 0.003 and p = 0.006, respectively). The incidence rates of ischemic and hemorrhagic stroke were 3.5% and 2.0%, respectively.
    Conclusion: This systematic surveillance study indicated that the modification of the indications for use based on the results of the SAMMPRIS trial for the Wingspan stent was effective in reducing 30-day stroke or death.
    Language English
    Publishing date 2022-07-21
    Publishing country Japan
    Document type Journal Article
    ISSN 2186-2494
    ISSN (online) 2186-2494
    DOI 10.5797/jnet.oa.2021-0099
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Rapid ventricular pacing for flow control during transarterial Onyx embolization of tentorial dural arteriovenous fistulas.

    Tsuji, Eisaku / Okada, Hideo / Terada, Tomoaki

    BMJ case reports

    2021  Volume 14, Issue 8

    Abstract: We report transarterial Onyx embolization with flow control using rapid ventricular pacing (RVP) in a middle-aged male patient with tentorial dural arteriovenous fistulas (TDAVFs). The patient completed angiographic obliteration in one session without ... ...

    Abstract We report transarterial Onyx embolization with flow control using rapid ventricular pacing (RVP) in a middle-aged male patient with tentorial dural arteriovenous fistulas (TDAVFs). The patient completed angiographic obliteration in one session without any complications, and the 6-month postangiographic obliteration follow-up showed no evidence of residual or recurrent dural arteriovenous fistulas. RVP may be a novel treatment option of flow control to facilitate the embolic agent penetrating into the venous side and to achieve complete cure in transarterial embolization of TDAVFs.
    MeSH term(s) Central Nervous System Vascular Malformations/diagnostic imaging ; Central Nervous System Vascular Malformations/therapy ; Dimethyl Sulfoxide ; Embolization, Therapeutic ; Humans ; Male ; Middle Aged ; Polyvinyls ; Retrospective Studies ; Treatment Outcome
    Chemical Substances Polyvinyls ; Dimethyl Sulfoxide (YOW8V9698H)
    Language English
    Publishing date 2021-08-10
    Publishing country England
    Document type Case Reports ; Journal Article
    ISSN 1757-790X
    ISSN (online) 1757-790X
    DOI 10.1136/bcr-2021-242833
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A Case of Pterygopalatine Fossa Arteriovenous Malformation Treated by Transarterial Embolization Using a Dual-Lumen Balloon Catheter.

    Nakayama, Sadayoshi / Terada, Tomoaki / Wada, Akira / Yabuzaki, Hajime

    Journal of neuroendovascular therapy

    2021  Volume 16, Issue 7, Page(s) 361–365

    Abstract: Objective: We report a rare case of pterygopalatine fossa arterial venous shunt disease with venous congestion of the superior ophthalmic vein (SOV) that was treated by transarterial balloon-assisted embolization.: Case presentation: A 57-year-old ... ...

    Abstract Objective: We report a rare case of pterygopalatine fossa arterial venous shunt disease with venous congestion of the superior ophthalmic vein (SOV) that was treated by transarterial balloon-assisted embolization.
    Case presentation: A 57-year-old man presented with congestion of the right bulbar conjunctiva, protrusion, and swelling of the right eyelid was admitted to our hospital. Angiography demonstrated an arteriovenous fistula (AVF) forming small congregated vessels in the pterygopalatine fossa fed by the branch of the ophthalmic artery (OA) and artery of the superior orbital fissure, draining into the SOV via the inferior ophthalmic vein (IOV). From the artery of the superior orbital fissure, transarterial embolization (TAE) with ONYX using a dual-lumen balloon catheter was performed. The patient was treated without complications.
    Conclusion: TAE using transarterial balloon-assisted embolization with ONYX is effective for periorbital arteriovenous shunts, although special care is necessary to prevent the migration of ONYX into the OA.
    Language English
    Publishing date 2021-10-08
    Publishing country Japan
    Document type Case Reports
    ISSN 2186-2494
    ISSN (online) 2186-2494
    DOI 10.5797/jnet.cr.2021-0032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Partially thrombosed giant basilar tip aneurysm that remarkably decreased in size after stent-assisted coiling associated with the disappearance of neovascularization.

    Matsuda, Yoshikazu / Terada, Tomoaki / Tetsuo, Yoshiaki / Tsumoto, Tomoyuki

    Neuroradiology

    2021  Volume 64, Issue 4, Page(s) 837–841

    Abstract: Endovascular treatment for partially thrombosed giant basilar tip aneurysms has not been established because of its low cure rate and numerous associated comorbidities. Although some authors reported the growth mechanism of partially thrombosed aneurysm, ...

    Abstract Endovascular treatment for partially thrombosed giant basilar tip aneurysms has not been established because of its low cure rate and numerous associated comorbidities. Although some authors reported the growth mechanism of partially thrombosed aneurysm, there is no report for the process of its shrinkage after treatment. We describe a case of a partially thrombosed giant basilar tip aneurysm presenting with disturbance of consciousness because of a mass effect and brain edema. The patient underwent stent-assisted coiling using a low-profile visualized intraluminal support stent (Terumo). Although pre-operative magnetic resonance imaging (MRI) and angiography revealed prominent neovascularization of the inner aneurysmal layer, this vessel was absent on follow-up angiography 1 month after treatment. Repeat angiography demonstrated the gradual recanalization of the aneurysm. However, repeat MRI examinations showed remarkable shrinkage of the thrombosed aneurysm, and the complete disappearance of the thrombosed component was noted 6 months after treatment. The disappearance of neovascularization 1 month after the treatment may have contributed to the shrinkage of the thrombosed aneurysm. Stent-assisted coiling combined with alteration caused a hemodynamic change in this aneurysm, and the flow-diverting effect might have controlled this partially thrombosed giant aneurysm.
    MeSH term(s) Brain Edema/complications ; Cerebral Angiography/methods ; Embolization, Therapeutic/methods ; Humans ; Intracranial Aneurysm/diagnostic imaging ; Intracranial Aneurysm/surgery ; Magnetic Resonance Imaging ; Stents ; Treatment Outcome
    Language English
    Publishing date 2021-11-27
    Publishing country Germany
    Document type Case Reports ; Journal Article
    ZDB-ID 123305-1
    ISSN 1432-1920 ; 0028-3940
    ISSN (online) 1432-1920
    ISSN 0028-3940
    DOI 10.1007/s00234-021-02867-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Stent-Assisted Coil Embolization of Ruptured Aneurysms in the Acute Stage: Advantages and Disadvantages.

    Nakajo, Takato / Terada, Tomoaki / Tsumoto, Tomoyuki / Matsuda, Yoshikazu / Matsumoto, Hiroaki / Nakayama, Sadayoshi / Mizutani, Tohru

    Journal of neuroendovascular therapy

    2023  Volume 17, Issue 10, Page(s) 209–216

    Abstract: Objective: In the acute stage of ruptured cerebral aneurysms, limited devices are available, making the treatment difficult. We aimed to evaluate the outcomes of the coil embolization with stenting for the ruptured cerebral aneurysms in the acute stage.! ...

    Abstract Objective: In the acute stage of ruptured cerebral aneurysms, limited devices are available, making the treatment difficult. We aimed to evaluate the outcomes of the coil embolization with stenting for the ruptured cerebral aneurysms in the acute stage.
    Methods: We assessed 22 cases treated with stenting among 134 of 169 consecutive patients with subarachnoid hemorrhages undergoing an endovascular treatment between April 2014 and December 2021, of which 134 underwent an embolization during the acute stage. A stent was used in the patients wherein the treatment with the balloon-assisted or double catheter technique was difficult. Stenting was performed under the loading of two or more antiplatelet agents.
    Results: The mean age of the patients was 68.9 years, of which five were male and 14 (63.6%) had severe grade (World Federation of Neurosurgeons grade IV, V). The aneurysm site was the anterior communicating artery in four cases, internal carotid artery in nine, middle cerebral artery in two, vertebrobasilar artery in six, and posterior cerebral artery in one. The aneurysm shape was saccular in 13 cases, dissection in seven, and fusiform in two. Stents were used for wide-neck aneurysms in 12 cases, vascular preservation in seven, and rescue in three. The mean maximum diameter was 9.6 mm. The mean neck size was 6.4 mm. Complete occlusion and neck remnant were found in eight and seven cases, respectively. The perioperative complication rate was 45.5% (thromboembolism in five cases, stent occlusion in two, re-bleeding in two, and cerebral hemorrhage in one). The outcomes included modified Rankin Scale 0-2 in seven cases, 4-5 in five, and 6 in nine. Stent-related death occurred in one case. The rate of morbidity and mortality was 18.2%. Although stents were used in the acute stage of rupture, they were used for the right reasons. However, a high rate of complications occurred: two cases of re-bleeding, in which an incomplete occlusion was a factor.
    Conclusion: Stent placement in patients with the acute ruptured cerebral aneurysms should be carefully determined and efforts should be made to reduce the embolic and hemorrhagic complications. However, it may be an effective treatment option when other options could be extremely difficult.
    Language English
    Publishing date 2023-08-10
    Publishing country Japan
    Document type Journal Article
    ISSN 2186-2494
    ISSN (online) 2186-2494
    DOI 10.5797/jnet.oa.2023-0028
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Carotid artery stenting for stenosis after carotid artery replacement: An illustrative case report.

    Nagatsuka, Hiroki / Miki, Yuma / Tetsuo, Yoshiaki / Yabuzaki, Hajime / Nakayama, Sadayoshi / Tanaka, Yuko / Matsuda, Yoshikazu / Tsumoto, Tomoyuki / Terada, Tomoaki / Mizutani, Tohru

    Surgical neurology international

    2023  Volume 14, Page(s) 8

    Abstract: Background: There are few reports on the treatment of carotid artery stenosis after arterial vessel replacement. We report and discuss an illustrative case of carotid artery stenting (CAS) performed for stenosis after carotid artery replacement.: Case ...

    Abstract Background: There are few reports on the treatment of carotid artery stenosis after arterial vessel replacement. We report and discuss an illustrative case of carotid artery stenting (CAS) performed for stenosis after carotid artery replacement.
    Case description: A woman in her 20s experienced injury to the right carotid artery during an operation for removal of a carotid body tumor 6 years before presentation. The right common carotid artery and internal carotid artery were replaced with an artificial vessel graft at that time. Intraluminal stenosis in the graft was not identified 3 years after surgery; however, 4 years after surgery, stenosis was recognized at the non-anastomotic site inside the artificial vessel graft. Subsequently, antiplatelet therapy was initiated. The stenosis was noted to progress gradually in follow-up appointments. Therefore, we decided to intervene because of the patient's young age and the risk of long-term hemodynamic stress. Angiography revealed pseudo-occlusion in the artificial vessel. Percutaneous transluminal angioplasty was performed for stenosis with distal protection; subsequently, CAS was performed. The patient was discharged without neurological deficits 4 days after the operation, and no apparent restenosis was observed as of the 1-year follow-up.
    Conclusion: Stenosis after cervical artery replacement can be safely treated with CAS. Inflation pressure and stent should be selected according to the pathology of the stenosis.
    Language English
    Publishing date 2023-01-13
    Publishing country United States
    Document type Case Reports
    ISSN 2229-5097
    ISSN 2229-5097
    DOI 10.25259/SNI_700_2022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Intracranial Non-Sinus-Type Dural Arteriovenous Fistulas Could Be Curable by Transarterial Embolization or Transvenous Embolization with Liquid Embolic Material.

    Matsuda, Yoshikazu / Terada, Tomoaki / Sakamoto, Yu / Kubo, Minako / Umesaki, Arisa / Tanaka, Yuko / Matsumoto, Hiroaki / Yamaga, Hiroo / Tsumoto, Tomoyuki / Mizutani, Tohru

    Journal of neuroendovascular therapy

    2023  Volume 17, Issue 9, Page(s) 196–201

    Abstract: Objective: Recently, the occlusion rate of transarterial embolization (TAE) for intracranial non-sinus-type dural arteriovenous fistulas (NSDAVFs) has improved after ONYX was introduced. Additionally, when TAE for NSDAVF is unsuccessful, transvenous ... ...

    Abstract Objective: Recently, the occlusion rate of transarterial embolization (TAE) for intracranial non-sinus-type dural arteriovenous fistulas (NSDAVFs) has improved after ONYX was introduced. Additionally, when TAE for NSDAVF is unsuccessful, transvenous embolization (TVE) has become available as an alternative treatment. We investigated the factor for the favorable occlusion rate of endovascular treatment for NSDAVF at our institutions.
    Methods: Two hundred and twenty-seven patients with intracranial dural arteriovenous fistulas (DAVFs) were treated at our institutions between September 2014 and October 2022. The patients diagnosed with NSDAVF in all DAVFs who underwent endovascular treatment were included. The clinical characteristics, angiographical outcomes, and clinical outcomes of patients who underwent endovascular treatment were evaluated.
    Results: Thirty-eight patients had intracranial NSDAVF (tentorial: 23 cases, parasagittal-convexity: 7, anterior cranial fossa: 6, middle cranial fossa: 2). Our participants' mean age was 64.8 ± 11.3 years, and 31 (81.6%) of them were males. Patients' symptoms were as follows: asymptomatic (24), hemorrhage (10), tinnitus (3), and trigeminal neuralgia (1). TAE and TVE were performed on 35 and 3 patients, respectively. The rate of immediate angiographical occlusion was 84.2% (32/38). The follow-up angiographical occlusion rate in 6 months was 88.5% (31/35). Complications occurred in three cases. There was no morbidity or mortality after 30 days.
    Conclusion: TAE using the combination of the new microcatheter and microguidewire and TVE in the case of difficult or failed TAE for NSDAVF could achieve high success rates and safety.
    Language English
    Publishing date 2023-07-22
    Publishing country Japan
    Document type Journal Article
    ISSN 2186-2494
    ISSN (online) 2186-2494
    DOI 10.5797/jnet.oa.2023-0032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Intraosseous Arteriovenous Fistula Around the Anterior Condylar Confluence as an Occipital Bone Fracture Sequela.

    Wada, Akira / Umesaki, Arisa / Kawauchi, Yuta / Kubo, Minako / Terada, Tomoaki

    World neurosurgery

    2020  Volume 144, Page(s) 112–114

    Abstract: Background: Although traumatic dural arteriovenous fistula (AVF) is a rare condition, dural injury associated with skull fracture is one of the major factors for the formation of dural AVF at the skull fracture area. We report a case of de novo ... ...

    Abstract Background: Although traumatic dural arteriovenous fistula (AVF) is a rare condition, dural injury associated with skull fracture is one of the major factors for the formation of dural AVF at the skull fracture area. We report a case of de novo intraosseous AVF around the anterior condylar confluence after head injury associated with skull base fracture.
    Case description: A woman in her 70s presented with pulsatile tinnitus 3 months after cerebellar infarction and occipital bone fracture. The appearance of de novo intraosseous AVF was confirmed by magnetic resonance imaging and magnetic resonance angiography and treated with coil embolization, which led to symptomatic relief without recurrence on follow-up.
    Conclusions: There is no previous report to our knowledge of intraosseous AVF around the anterior condylar confluence proven to appear after skull fracture. This case demonstrates that head injury associated with skull base fracture could be one etiology of dural AVF around the anterior condylar confluence.
    MeSH term(s) Aged ; Central Nervous System Vascular Malformations/etiology ; Conservative Treatment ; Embolization, Therapeutic ; Female ; Humans ; Magnetic Resonance Angiography ; Magnetic Resonance Imaging ; Occipital Bone/injuries ; Skull Base/injuries ; Skull Fractures/complications ; Tinnitus/therapy
    Language English
    Publishing date 2020-09-02
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2020.08.171
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: In vitro experiments of vessel wall apposition between the Enterprise and Enterprise 2 stents for treatment of cerebral aneurysms.

    Kono, Kenichi / Terada, Tomoaki

    Acta neurochirurgica

    2016  Volume 158, Issue 2, Page(s) 241–245

    Abstract: Background: A closed-cell stent called Enterprise has been used for stent-assisted coil embolization of cerebral aneurysms. The Enterprise stent tends to cause kinks and vessel wall malposition in curved vessels and may cause thromboembolic ... ...

    Abstract Background: A closed-cell stent called Enterprise has been used for stent-assisted coil embolization of cerebral aneurysms. The Enterprise stent tends to cause kinks and vessel wall malposition in curved vessels and may cause thromboembolic complications. We evaluated vessel wall apposition of a new closed-cell stent, Enterprise 2, compared with a previous Enterprise stent, using curved vascular silicone models.
    Methods: The Enterprise or Enterprise 2 stent was deployed in curved vascular models with various radii of approximately 5 to 10 mm. Stent deployment was performed 25 times in each stent. A push-pull technique was used to minimize incomplete wall apposition. To evaluate conformity of stents, gaps between a stent and a vessel wall were measured.
    Results: The gap ratio (gap / a wall diameter) was 15 % ± 17 % (mean ± standard deviation) and 41 % ± 15 % with the Enterprise 2 stent and the Enterprise stent, respectively. Taking gap ratios and radii of vessel curvature into consideration, the Enterprise 2 stent had significantly better wall apposition than the Enterprise stent (p = 0.005). In the same radius of vessel curvature, the Enterprise 2 stent had approximately half of the gap compared with the Enterprise stent. There were no significant differences in vessel straightening effects between the two stents.
    Conclusions: The Enterprise 2 stent has better wall apposition in curved vessels than the Enterprise stent. The gap between a vessel wall and the Enterprise 2 stent is approximately half that of the Enterprise stent. However, gaps and kinks are still present in curved vessels with a small radius. Caution should be taken for kinks and malposition in acutely curved vessels, such as the siphon of the internal carotid artery.
    MeSH term(s) Blood Vessels/anatomy & histology ; Embolization, Therapeutic/methods ; Humans ; Intracranial Aneurysm/therapy ; Models, Anatomic ; Silicones ; Stents
    Chemical Substances Silicones
    Language English
    Publishing date 2016-02
    Publishing country Austria
    Document type Journal Article
    ZDB-ID 80010-7
    ISSN 0942-0940 ; 0001-6268
    ISSN (online) 0942-0940
    ISSN 0001-6268
    DOI 10.1007/s00701-015-2666-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Two patients of visual disturbance and optic perineuritis after placement of a flow diverter.

    Tanaka, Yuko / Nagatsuka, Hiroki / Miki, Yuma / Tetsuo, Yoshiaki / Yabuzaki, Hajime / Nakayama, Sadayoshi / Matsuda, Yoshikazu / Tsumoto, Tomoyuki / Terada, Tomoaki

    Radiology case reports

    2022  Volume 17, Issue 5, Page(s) 1487–1490

    Abstract: The pathogenesis of new visual symptoms after flow diverter stent placement in the ophthalmic artery for internal carotid artery aneurysms remains unclear. We report two cases of patients who developed visual field disturbance and decreased visual acuity ...

    Abstract The pathogenesis of new visual symptoms after flow diverter stent placement in the ophthalmic artery for internal carotid artery aneurysms remains unclear. We report two cases of patients who developed visual field disturbance and decreased visual acuity following flow diverter placement. The "doughnut sign" was found around the optic nerve on magnetic resonance imaging. The patients had progressive visual field defects and impairment on the side where the flow diverter was placed. Short tau inversion recovery coronal images showed a doughnut-shaped high-signal around the optic nerve on the affected side. Both patients were treated with steroid pulse therapy, and 1 received endovascular therapy. Their symptoms gradually improved, and the "doughnut sign" disappeared. The "doughnut sign" observed around the optic nerve on magnetic resonance imaging may be found alongside visual disturbance symptoms after paraclinoid aneurysm treatment. It is recommended that short tau inversion recovery sequences be performed preoperatively in patients presenting with visual impairment and in whom the possibility of postoperative exacerbation is suspected.
    Language English
    Publishing date 2022-03-03
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2406300-9
    ISSN 1930-0433
    ISSN 1930-0433
    DOI 10.1016/j.radcr.2022.01.085
    Database MEDical Literature Analysis and Retrieval System OnLINE

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