Updated on 2024/12/14

写真a

 
OOKUBO Ryou
 
Organization
Hospital Clinical Departments Surgery [Cardiovascular]
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Education

  • Asahikawa Medical College   Faculty of Medicine

    - 2017.3

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    Country: Japan

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Research History

  • Asahikawa Medical College   Assistant Professor

    2023.4

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Papers

  • Successful surgical repair of a huge left ventricular pseudoaneurysm after repair of left ventricular rupture during mitral valve replacement

    Kyoka Hayashi, Ryohei Ushioda, Jun Maruoka, Kaname Shimizu, Kentaro Shirakura, Nobuhiro Mochizuki, Yuki Setogawa, Ryo Okubo, Miyamoto Hiroyuki, Shougo Takahashi, Shingo Kunioka, Masahiro Tsutsui, Kamiya Hiroyuki

    Journal of Surgical Case Reports   2024.10

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/jscr/rjae636

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  • Relationships among hemolysis indicators and neuron-specific-enolase in patients undergoing veno-arterial extracorporeal membrane oxygenation.

    Okubo R, Shirasaka T, Ushioda R, Narita M, Kunioka S, Kikuchi Y, Tsutsui M, Motoyoshi N, Kamiya H

    Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs   2024.7

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    Neuron-specific-enolase is used as a marker of neurological prognosis after cardiopulmonary resuscitation. It is also present in red blood cells and platelets. It is not known whether hemolysis increases the values of neuron-specific-enolase enough to clinically affect its interpretation in critically ill patients who are to be introduced to veno-arterial extracorporeal oxygenation. In this study, we examined the relationships among neuron-specific-enolase and hemolysis indicators such as free hemoglobin and lactate dehydrogenase after the introduction of veno-arterial extracorporeal oxygenation. Of the 91 patients who underwent veno-arterial extracorporeal membrane oxygenation in our hospital from January 1, 2018, to February 24, 2021, 68 patients survived for more than 24 h. Of these, 14 patients who were categorized into the better cerebral performance categories (1-3) and 19 patients who were categorized into the poor neurological prognosis category (4) were included. After the introduction of veno-arterial extracorporeal membrane oxygenation, neuron-specific-enolase was markedly higher in the poor neurological prognosis group than in the good neurological prognosis group (41.6 vs. 92.0, p = 0.04). A significant positive correlation was revealed between neuron-specific-enolase and free hemoglobin in the good neurological prognosis group (rs = 0.643, p = 0.0131). A similar relationship was observed for lactate dehydrogenase and neuron-specific-enolase in both the conscious (rs = 0.737, p = 0.00263) and non-conscious groups (rs = 0.544, p = 0.0176). When neuron-specific-enolase is used as a marker for neuroprognostic evaluation, an abnormally high value is likely to indicate the lack of consciousness, whereas a lower elevation should be interpreted with caution, taking into account the effects of hemolysis.

    DOI: 10.1007/s10047-024-01454-y

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  • Renal rescue after inadvertent coverage during endovascular aneurysm repair

    Ryo Okubo, Norifumi Otani, Hiroyuki Kamiya

    Journal of Vascular Surgery Cases, Innovations and Techniques   2024.4

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jvscit.2023.101411

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  • Successful surgical correction of an incomplete atrioventricular septal defect in a 76-year-old female patient

    Kentaro Shirakura, Nobuyuki Akasaka, Daichi Mizushima, Masahiko Narita, Ryo Okubo, Tomoki Nakatsu, Daita Kobayashi, Hiroyuki Kamiya

    Journal of Surgical Case Reports   2024.3

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    DOI: 10.1093/jscr/rjae187

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  • Two-stage repair for DeBakey type II acute aortic dissection and distal aortic arch aneurysm in a nonagenarian patient

    Kentaro Shirakura, Shingo Kunioka, Kazuki Miyatani, Nobuhiro Mochizuki, Hideki Isa, Yuki Setogawa, Fumitaka Suzuki, Ryo Okubo, Ryohei Ushioda, Aina Hirofuji, Masahiro Tsutsui, Natsuya Ishikawa, Hiroyuki Kamiya

    Journal of Surgical Case Reports   2023.12

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/jscr/rjad648

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  • Giant Superior Mesenteric Artery Aneurysm Treated by Endovascular Treatment in a Very Elderly Female

    Ryo Okubo, Shinsuke Kikuchi, Norifumi Otani, Masahiro Tsutsui, Hiroyuki Kamiya

    Vascular Specialist International   2023.5

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.5758/vsi.230020

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  • Intra-Operative Occlusion of the Contralateral Common Iliac Artery by the Gore Excluder Iliac Branch System

    Ryo Okubo, Norifumi Otani, Masahiro Tsutsui, Hiroyuki Kamiya

    EJVES Vascular Forum   2023

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ejvsvf.2023.05.017

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  • Mesenteric Ischemia After Cardiac Surgery in Dialysis Patients: An Overlooked Risk Factor.

    Takeyoshi D, Shirasaka T, Shibagaki K, Okubo R, Kunioka S, Kikuchi Y, Kamiya H

    The heart surgery forum   2022.10

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    <h4>Background</h4>No study has examined the association of the calcification of abdominal artery orifices with nonocclusive mesenteric ischemia (NOMI) in dialysis patients undergoing cardiac surgery. Thus, this study aimed to determine whether calcification of abdominal blood vessel orifices in hemodialysis patients may be a risk factor for NOMI and examine the long-term survival of dialysis patients after undergoing cardiac surgery.<h4>Methods</h4>From April 2014 to September 2020, 100 dialysis patients underwent cardiac surgery at our hospital. The calcification of the celiac artery (CA) and superior mesenteric artery (SMA) was evaluated by computed tomography, and the degree of orifice stenosis was graded as follows: patent, 0; partial occlusion, 1; and complete occlusion, 2.<h4>Results</h4>Eight patients experienced NOMI, and all of them died. SMA calcification scores were not significantly different between the NOMI and non-NOMI groups (1.38±0.52 vs. 1.13±0.69; P = 0.247). However, the average CA orifice calcification score was significantly greater in the NOMI group than in the non-NOMI group (1.63±0.52 vs. 1.15±0.65; P = 0.039), and the SMA+CA orifice calcification scores were significantly different between the groups (3.00±0.76 vs. [non-NOMI] 2.25±1.18; P = 0.028). In all patients, the 30-day and in-hospital mortality rates were 13% and 18%, respectively. All patients were completely followed up with a mean follow-up period of 604±585 days. Kaplan-Meier survival curves showed that patients with SMA and CA calcification tended to have a shorter overall survival than patients without calcification; however, no significant difference was noted.<h4>Conclusions</h4>The calcification of CA and/or SMA orifices was associated with postoperative NOMI and poor long-term survival among dialysis patients undergoing cardiac surgery.

    DOI: 10.1532/hsf.4859

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  • Post-cardiotomy pericardial effusion and postoperative atrial fibrillation risk

    Yuta Kikuchi, Yasuaki Saijo, Masahiko Narita, Keisuke Shibagaki, Ryo Okubo, Shingo Kunioka, Tomonori Shirasaka, Hiroyuki Kamiya

    The International Journal of Cardiovascular Imaging   2022.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media {LLC}  

    DOI: 10.1007/s10554-022-02560-9

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  • A word of caution: bilateral axillofemoral bypass could not provide sufficient blood flow in a patient who underwent aortic resection for aortoesophageal fistula: a case report.

    Ryo Okubo

    Journal of surgical case reports   2021.10

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    An 81-year-old man was transferred to our hospital for a ruptured infected descending aortic aneurysm. An emergency thoracic endovascular aortic repair was performed, but a computed tomography scan 7 days later revealed an aortoesophageal fistula. The establishment of extracorporeal circulation using the femoral artery and utilization of the omentum was considered difficult. We performed bilateral axillofemoral bypass followed by descending aortic resection and esophagectomy. However, the patient's circulatory insufficiency worsened, and he died on the 18th postoperative day. In the treatment of aortoesophageal fistula, bilateral axillofemoral bypass is not recommended as an alternative to descending aortic replacement.

    DOI: 10.1093/jscr/rjab356

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  • A word of caution: bilateral axillofemoral bypass could not provide sufficient blood flow in a patient who underwent aortic resection for aortoesophageal fistula: a case report

    Ryo Okubo, Tomonori Shirasaka, Keisuke Shibagaki, Hiroyuki Kamiya

    Journal of Surgical Case Reports   2021 ( 10 )   2021.10

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press ({OUP})  

    DOI: 10.1093/jscr/rjab356

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  • Simultaneous aortic and pulmonary valve replacement in a young patient after intracardiac repair for tetralogy of Fallot: mechanical or biological valve? A case report.

    Ryo Okubo

    Journal of surgical case reports   2021.5

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    Pulmonary valve stenosis and regurgitation can occur in the distant stages after intracardiac repair of tetralogy of Fallot (TOF). Aortic regurgitation (AR) can also occur, although it is rare in postoperative patients. However, there are few reports of simultaneous replacement of the pulmonary and aortic valves in young patients after intracardiac repair of TOF, and there are no clear guidelines for selecting a valve prosthesis in such patients. We report a case of severe pulmonary valve stenosis and regurgitation with severe AR 38 years after the TOF operation, in which urgent double valve replacement and right ventricular outflow tract patching were performed with a mechanical valve in the aortic valve position and a bioprosthetic valve in the pulmonary valve position, with a successful outcome.

    DOI: 10.1093/jscr/rjab170

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  • Successful endovascular repair of a ruptured isolated iliac artery aneurysm: A case report.

    Fumiaki Kimura, Ryo Ookubo, Daita Kobayashi, Hideyuki Harada, Toshio Baba

    Clinical case reports   7 ( 10 )   1880 - 1884   2019.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley-Blackwell Publishing Ltd  

    While isolated iliac artery aneurysm is rare, its rupture can lead to complete circulatory collapse and possibly death. Herein, we report a case of rupture of a large isolated aneurysm of the right common iliac artery that led to circulatory collapse and rapid endovascular repair saved the patient's life.

    DOI: 10.1002/ccr3.2385

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Presentations

  • 意図しないEVAR術中腎動脈閉塞の再建においてステントグラフトと大動脈の間でballoon catheterを拡張させ間隙を作ることで腎血流を担保しながらbail outに成功した1例

    大久保諒

    第6回北海道外科関連学会機構合同学術集会(HOPES 2023 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Two cases bailed out by using a steerable sheath for unintended renal artery occlusion during EVAR

    大久保 諒

    第53回日本心臓血管外科学会学術総会 

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    Event date: 2023.3

    Language:English   Presentation type:Oral presentation (general)  

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