Tsuyoshi Ito

Saga University, Сага Япония, Saga, Japan

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Publications (4)6.88 Total impact

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    ABSTRACT: Aortic root replacement after aortic valve replacement (AVR) is often complicated by bleeding around the aortic root, which increases the risk of morbidity and mortality, making it a technically challenging procedure. We describe a new technique of aortic root replacement designed to minimize bleeding around the aortic root. This surgical technique focuses on safe dissection and exposure of the aortic root to avoid inadvertent entry into the right atrium or right ventricle; on modifying the proximal anastomosis of the graft to the aortic annulus; and on performing a coronary artery reimplantation that achieves complete hemostasis at the suture lines. We performed aortic root replacement after AVR in four patients over a 4-year period, without encountering any bleeding around the aortic root.
    Surgery Today 02/2006; 36(2):201-3. DOI:10.1007/s00595-005-3127-z · 1.53 Impact Factor
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    Masaru Yoshikai · Tsuyoshi Ito · Keiji Kamohara · Junji Yunoki ·
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    ABSTRACT: The skeletonized internal thoracic artery (ITA) has several advantages over a pedicled one in coronary artery bypass grafting (CABG). An ultrasonic scalpel makes ITA skeletonization easy and speedy, however, the ultrasonic energy that is transmitted to the artery itself can occasionally injure the endothelium. Therefore, the endothelial integrity of the ultrasonically skeletonized ITA is a major concern related to this technique. The purpose of this study is to assess the endothelial integrity of the ultrasonically skeletonized ITA. We skeletonized the left ITA with an ultrasonic scalpel in nine patients who underwent CABG, and thereafter the terminal portion of this artery was subjected to a morphological study. The endothelial integrity of this artery was morphologically assessed using scanning electron microscopy, and the results were compared to that of the left ITA skeletonized with fine scissors. All ITA specimens showed a completely confluent endothelium, and no endothelial injury was observed by the scanning electron microscopic study. The skeletonization of the ITA with an ultrasonic scalpel had no deleterious effect on the endothelium. This morphological study confirmed the safety and the reliability of this technique, and we therefore recommend its clinical use in the skeletonization of the ITA for CABG.
    European Journal of Cardio-Thoracic Surgery 03/2004; 25(2):208-11. DOI:10.1016/j.ejcts.2003.11.013 · 3.30 Impact Factor
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    ABSTRACT: Mitral annular reconstruction using a pericardial patch was performed in 3 cases of atrioventricular disruption. This technique may be useful for atrioventricular disruption in cases of active endocarditis, redo valve replacement, left ventricular rupture after mitral valve replacement, and annular calcification.
    Asian cardiovascular & thoracic annals 01/2003; 10(4):344-5. DOI:10.1177/021849230201000416
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    ABSTRACT: The centrifugal pump is now widely used in open heart surgery for its clinical benefits related to the blood elements and the coagulation system. The purpose of this study was to compare the clinical performances of and the outcomes offered by 4 types of centrifugal pumps. For each pump, we investigated the effects on the blood elements, coagulation system, complements, and immunoglobulins during open heart surgery. Four types of centrifugal pumps were used: the HPM-15 (Nikkiso Co.), the Capiox (Terumo Co.), the Lifestream (St. Jude Medical Co.), and the BP-80 (Medtronic, BioMedicus Co.). The platelet count, lactate dehydrogenase (LDH), antithrombin III (AT III), thrombin-antithrombin complex (TAT), complements (C3, C4, and CH50), and immunoglobulins (IgG, IgA, and IgM) were measured before and after cardiopulmonary bypass (CPB). The platelet count was decreased more significantly by the HPM-15 than by any of the other pumps. The other parameters showed no difference among the 4 pumps. In clinical use, each of the 4 types of centrifugal pumps was safe.
    Artificial Organs 08/1997; 21(7):760-2. DOI:10.1111/j.1525-1594.1997.tb03737.x · 2.05 Impact Factor