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  1. Book ; Online ; E-Book: Treatment of non-vitamin K antagonist oral anticoagulants

    Uno, Masaaki / Ogasawara, Kuniaki

    for prevention of stroke

    2017  

    Author's details Masaaki Uno, Kuniaki Ogasawara editors
    Keywords Cerebral infarct ; Intracranial breeding ; Intraoperative management ; NOACs ; Secondary prevention
    Language English
    Size 1 Online-Ressource (ix, 99 Seiten), Illustrationen
    Publisher Springer
    Publishing place Singapore
    Publishing country Singapore
    Document type Book ; Online ; E-Book
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT019157392
    ISBN 978-981-10-1878-7 ; 9789811018770 ; 981-10-1878-2 ; 9811018774
    DOI 10.1007/978-981-10-1878-7
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

    Full text online

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  2. Article ; Online: Intraoperative application of indocyanine green and temporary venous occlusion test to assess collateral flow during microvascular decompression for venous-related trigeminal neuralgia: illustrative case.

    Fujimoto, Kentaro / Akamatsu, Yosuke / Nishikawa, Yasumasa / Ogasawara, Kuniaki

    Journal of neurosurgery. Case lessons

    2024  Volume 7, Issue 15

    Abstract: Background: In microvascular decompression (MVD) for vein-related trigeminal neuralgia (TN), determining whether transection of the offending vein is safe can be challenging. Here, the authors present a case of vein-related TN successfully treated by ... ...

    Abstract Background: In microvascular decompression (MVD) for vein-related trigeminal neuralgia (TN), determining whether transection of the offending vein is safe can be challenging. Here, the authors present a case of vein-related TN successfully treated by sacrificing the offending vein on the basis of findings from indocyanine green (ICG) video angiography and a temporary venous occlusion test to assess the collateral flow of the offending vessel.
    Observations: A 43-year-old man presented with TN, which had failed to respond to previous medical therapy. Gadolinium-enhanced magnetic resonance imaging (MRI) revealed that the transverse or superior petrosal vein was the offending vein. The patient underwent MVD. Because the transposition of the offending vein was anatomically challenging, a temporary vein occlusion test was performed using ICG video angiography. During and after temporary occlusion, bidirectional flow in the offending vein was observed, suggesting collateral flow even after vein occlusion. On the basis of these findings, the offending vein was transected, resulting in relief from pain without any complications. Postoperative MRI revealed no new lesions in the brainstem or the cerebellar hemisphere. The patient has been free from neuralgia for 6 months.
    Lessons: The temporary vein occlusion test under ICG video angiography was useful for evaluating collateral flow in the offending vein in TN.
    Language English
    Publishing date 2024-04-08
    Publishing country United States
    Document type Journal Article
    ISSN 2694-1902
    ISSN (online) 2694-1902
    DOI 10.3171/CASE2469
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Successful carotid stenting of a carotid arterial dissection after straightening the tortuosity using an inflated balloon guiding catheter and the delivery wire of an anchored stent retriever.

    Yoshida, Koji / Akamatsu, Yosuke / Matsumoto, Yoshiyasu / Ogasawara, Yasushi / Misaki, Toshinari / Konno, Hiromu / Ogasawara, Kuniaki

    Radiology case reports

    2024  Volume 19, Issue 4, Page(s) 1542–1546

    Abstract: The authors present a patient with carotid dissection in a tortuous arterial segment who successfully underwent carotid artery stenting (CAS) by straightening the tortuosity using an inflated balloon guiding catheter (BGC) and a stent retriever (SR). A ... ...

    Abstract The authors present a patient with carotid dissection in a tortuous arterial segment who successfully underwent carotid artery stenting (CAS) by straightening the tortuosity using an inflated balloon guiding catheter (BGC) and a stent retriever (SR). A 56-year-old man was transferred to our institute with right hemiparesis and a National Institutes of Health Stroke Scale score of 9. Magnetic resonance imaging showed left internal carotid artery (ICA) occlusion and ischemic change in the parietal lobe. Emergent angiography revealed tapered extracranial ICA occlusion sugg carotid artery dissection (CAD). CAS was attempted for CAD due to a mismatch of the motor area on clinical imaging. However, several attempts to navigate the stent delivery system over a guidewire failed. Therefore, we deployed a Trevo NXT ProVue SR (3 × 32 mm) in the middle cerebral artery, inflated a BGC, and then pulled on both to straighten the tortuous carotid artery, which resulted in successful navigation of the stent delivery system. The patient's symptoms improved after the recanalization. This case demonstrates the utility of a technique for navigation of a stent delivery system through a tortuous carotid artery in which the tortuosity is straightened by pulling on an inflated BGC and the delivery wire of the SR.
    Language English
    Publishing date 2024-01-27
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2406300-9
    ISSN 1930-0433
    ISSN 1930-0433
    DOI 10.1016/j.radcr.2024.01.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Slightly acidic electrolyzed water inhibits inflammation induced by membrane vesicles of

    Shimamura, Yuko / Oura, Yukino / Tsuchiya, Madoka / Yamanashi, Yuka / Ogasawara, Asako / Oishi, Minami / Komuro, Misaki / Sasaki, Kuniaki / Masuda, Shuichi

    Frontiers in microbiology

    2024  Volume 14, Page(s) 1328055

    Abstract: Staphylococcus ... ...

    Abstract Staphylococcus aureus
    Language English
    Publishing date 2024-01-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2023.1328055
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: The 10th Korea-Japan Joint Stroke Conference (KJJSC) at Osaka: The First-Ever and Hopefully, the Last Virtual Conference.

    Toyoda, Kazunori / Yoshimura, Sohei / Tanaka, Kanta / Ogasawara, Kuniaki / Rha, Joung-Ho

    Journal of stroke

    2023  Volume 25, Issue 1, Page(s) 177–178

    Language English
    Publishing date 2023-01-31
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2814366-8
    ISSN 2287-6405 ; 2287-6391
    ISSN (online) 2287-6405
    ISSN 2287-6391
    DOI 10.5853/jos.2023.00052
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Subarachnoid Hemorrhage Confirmed by Magnetic Resonance Imaging in a Patient with Brain Death owing to Hypoxic Encephalopathy Following Suicide by Hanging.

    Oshida, Sotaro / Yokosawa, Tomoki / Araya, Shizuka / Sato, Shinpei / Suzuki, Taro / Akamatsu, Yosuke / Ogasawara, Kuniaki

    NMC case report journal

    2024  Volume 11, Page(s) 61–67

    Abstract: Although true subarachnoid hemorrhage (SAH) is an atypical complication owing to suicide by hanging, pseudo-SAH can often develop because of hypoxic encephalopathy. Therefore, differentiating pseudo-SAH from true SAH using brain computed tomography (CT) ... ...

    Abstract Although true subarachnoid hemorrhage (SAH) is an atypical complication owing to suicide by hanging, pseudo-SAH can often develop because of hypoxic encephalopathy. Therefore, differentiating pseudo-SAH from true SAH using brain computed tomography (CT) is often challenging. In Japan, an individual's cause of brain death must be determined to be eligible for organ donation, regardless of whether true SAH is involved or not. Herein, we report a case of SAH confirmed by magnetic resonance imaging (MRI) in a patient with brain death owing to hypoxic encephalopathy following suicide by hanging. A 48-year-old man attempted suicide by hanging. Upon arrival at the hospital, he developed pulseless electrical activity with apnea. Although spontaneous circulation returned within a few minutes of his arrival, spontaneous breathing did not recover. The patient was in deep comatose state without response to pain stimulation, brainstem reflexes, or electrical activities on an electroencephalogram. Consequently, the patient met diagnostic criteria for clinical brain death based on the Japanese organ transplantation law. Brain CT revealed global hypoxic injury and high density in the basal cisterns and subarachnoid space. Brain MR T2*-weighted imaging revealed low intensity at the left Sylvian fissure underlying the hematoma. These findings indicated brain death owing to hypoxic encephalopathy following hanging, and incidental true SAH was confirmed by MRI. Donor surgery and organ transplantation were performed. Spontaneous SAH can often develop secondary to hanging, and brain MRI can effectively determine whether the cause of brain death involves true SAH.
    Language English
    Publishing date 2024-03-19
    Publishing country Japan
    Document type Case Reports
    ISSN 2188-4226
    ISSN 2188-4226
    DOI 10.2176/jns-nmc.2023-0275
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Acute large-vessel occlusion due to an infected thrombus formation induced by invasive sphenoid sinus aspergillosis: illustrative case.

    Matsumoto, Yoshiyasu / Akamatsu, Yosuke / Yoshida, Koji / Ogasawara, Yasushi / Misaki, Toshinari / Sasou, Shunichi / Konno, Hiromu / Ogasawara, Kuniaki

    Journal of neurosurgery. Case lessons

    2024  Volume 7, Issue 10

    Abstract: Background: The authors describe a rare case of acute large-vessel occlusion due to an infected thrombus formation that was induced by invasive sphenoid sinus aspergillosis.: Observations: An 82-year-old man with a history of immunoglobulin G4- ... ...

    Abstract Background: The authors describe a rare case of acute large-vessel occlusion due to an infected thrombus formation that was induced by invasive sphenoid sinus aspergillosis.
    Observations: An 82-year-old man with a history of immunoglobulin G4-related disease and long-term use of steroids and immunosuppressants was admitted to the authors' hospital with severe right hemiparesis. Cerebral angiography revealed occlusion of the left internal carotid artery (ICA). He underwent thrombectomy, resulting in successful recanalization. However, severe stenosis was evident in the left ICA cavernous segment. Pathological analysis of the retrieved thrombus identified Aspergillus. Postoperative magnetic resonance imaging revealed sinusitis in the left sphenoid sinus as a possible source of the infection. The patient's general condition deteriorated during the course of hospitalization due to refractory aspiration pneumonia, and he died 46 days after thrombectomy. Pathological autopsy and histopathological investigation of the left ICA and the left sphenoid sinus showed that Aspergillus had invaded the wall of the left ICA from the adjacent sphenoid sinus. These findings indicate a diagnosis of acute large-vessel occlusion due to infected thrombus formation induced by invasive sphenoid sinus aspergillosis.
    Lessons: Pathological analysis of a retrieved thrombus appears useful for identifying rare stroke etiologies such as fungal infection.
    Language English
    Publishing date 2024-03-04
    Publishing country United States
    Document type Journal Article
    ISSN 2694-1902
    ISSN (online) 2694-1902
    DOI 10.3171/CASE23733
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Spontaneous middle meningeal arteriovenous fistula without cortical venous reflux presenting with acute subdural hematoma: illustrative case.

    Yabuki, Masahiro / Akamatsu, Yosuke / Kashimura, Hiroshi / Kubo, Yoshitaka / Ogasawara, Kuniaki

    Journal of neurosurgery. Case lessons

    2023  Volume 6, Issue 6

    Abstract: Background: Dural arteriovenous fistula (AVF) without cortical venous reflux (CVR) has a relatively benign course. Here, the authors describe a patient presenting with subdural hematoma due to a middle meningeal AVF without CVR.: Observations: A 17- ... ...

    Abstract Background: Dural arteriovenous fistula (AVF) without cortical venous reflux (CVR) has a relatively benign course. Here, the authors describe a patient presenting with subdural hematoma due to a middle meningeal AVF without CVR.
    Observations: A 17-year-old male was admitted to the emergency department with acute headache without an episode of head trauma. Computed tomography demonstrated a left acute subdural hematoma (SDH). Because the nontraumatic SDH raised the suspicion of vascular pathology, emergent angiography was performed, which demonstrated an AVF fed by the middle meningeal artery and draining to the diploic vein via the serpentine meningeal vein without CVR. T2-weighted magnetic resonance imaging (MRI) revealed no signs of venous congestion. Given the proximity of the AVF to the SDH and the MRI findings, we suspected that the serpentine meningeal vein was responsible for the SDH. The patient was successfully treated with transarterial Onyx embolization. During the injection, Onyx migrated to the extravascular space following its penetration into the serpentine meningeal vein, suggesting the meningeal vein was a bleeding source of the subdural hematoma.
    Lessons: Despite the absence of cortical venous reflux, serpentine meningeal venous drainage of middle meningeal AVF can be a source of subdural hemorrhage.
    Language English
    Publishing date 2023-08-07
    Publishing country United States
    Document type Journal Article
    ISSN 2694-1902
    ISSN (online) 2694-1902
    DOI 10.3171/CASE23306
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: [Transition and current state of surgery for cerebrovascular diseases].

    Ogasawara, Kuniaki

    Nihon rinsho. Japanese journal of clinical medicine

    2016  Volume 74, Issue 4, Page(s) 567–572

    Abstract: Kinds and procedures of microsurgery for cerebrovascular diseases have almost not changed for recent several decades. However, indication of the microsurgery has changed with establishment of its evidences and development of novel treatment such as ... ...

    Abstract Kinds and procedures of microsurgery for cerebrovascular diseases have almost not changed for recent several decades. However, indication of the microsurgery has changed with establishment of its evidences and development of novel treatment such as endovascular surgery or radiosurgery. Advancement of neuroimaging also has leaded to arguments regarding indication of preventative surgery. Further, development of molecular biological techniques has resulted in new findings that get the heart of the disorder.
    MeSH term(s) Aneurysm, Ruptured/etiology ; Aneurysm, Ruptured/surgery ; Arterial Occlusive Diseases/surgery ; Carotid Stenosis/surgery ; Cerebral Arterial Diseases/surgery ; Cerebrovascular Disorders/diagnosis ; Cerebrovascular Disorders/surgery ; Endovascular Procedures/methods ; Endovascular Procedures/trends ; Humans ; Intracranial Aneurysm/etiology ; Intracranial Aneurysm/surgery ; Intracranial Arteriovenous Malformations/surgery ; Microsurgery/methods ; Microsurgery/trends ; Molecular Biology ; Moyamoya Disease/surgery ; Neuroimaging/methods ; Neuroimaging/trends ; Radiosurgery/methods ; Radiosurgery/trends
    Language Japanese
    Publishing date 2016-04
    Publishing country Japan
    Document type English Abstract ; Journal Article ; Review
    ZDB-ID 390903-7
    ISSN 0047-1852
    ISSN 0047-1852
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  10. Article ; Online: Using a low-metal-density stent for thrombectomy-resistant vertebrobasilar occlusion due to thrombus migration from a thrombosed vertebral artery aneurysm: illustrative case.

    Yoshida, Koji / Akamatsu, Yosuke / Tsutsui, Shota / Ogasawara, Yasushi / Misaki, Toshinari / Konno, Hiromu / Ogasawara, Kuniaki

    Journal of neurosurgery. Case lessons

    2023  Volume 5, Issue 19

    Abstract: Background: Thrombosed intracranial aneurysms can lead to large vessel occlusion as a result of spontaneous thrombosis. Although mechanical thrombectomy is likely effective, recurrent thromboembolism can occur if the thrombotic source remains untreated. ...

    Abstract Background: Thrombosed intracranial aneurysms can lead to large vessel occlusion as a result of spontaneous thrombosis. Although mechanical thrombectomy is likely effective, recurrent thromboembolism can occur if the thrombotic source remains untreated. The authors describe a case of recurrent vertebrobasilar artery occlusion due to thrombus migration from a large thrombosed vertebral artery (VA) aneurysm that was successfully treated with mechanical thrombectomy followed by stenting.
    Observations: A 61-year-old male previously diagnosed with a large, thrombosed VA aneurysm presented with right hypoesthesia. Imaging on admission showed left VA occlusion and an acute ischemic lesion in the left medial medulla. His symptoms worsened, with complete right hemiparesis and tongue deviation occurring 3 hours after admission, and mechanical thrombectomy was performed to recanalize the left-dominant VA. Despite several attempts, reocclusion of the vertebrobasilar system occurred after each mechanical thrombectomy because of repeated thrombus formation in the thrombosed aneurysm. Therefore, a low-metal-density stent was deployed to prevent thrombus migration into the parent artery, which resulted in complete recanalization and rapid improvement of the symptoms.
    Lessons: Stenting with a low-metal-density stent for recurrent embolism secondary to thrombus migration from a large thrombosed aneurysm was feasible in the acute stroke setting.
    Language English
    Publishing date 2023-05-08
    Publishing country United States
    Document type Journal Article
    ISSN 2694-1902
    ISSN (online) 2694-1902
    DOI 10.3171/CASE23107
    Database MEDical Literature Analysis and Retrieval System OnLINE

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