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39 results on '"Matsubara, Hirokazu"'

1. Current status of renal replacement therapy in Cambodia and Japanese support activities in developing countries in East and Southeast Asia: a report as of June 2018 from the Non-Western World Countries Symposium at the 63rd Annual Meeting of the Japanese Society for Dialysis Therapy

Author

Hyodo, Toru, Hirawa, Nobuhito, Isaka, Yoshitaka, Nakamoto, Hidetomo, Thim, Pichthida, Phon, Elin, Hy, Chanseila, Chan, Sovandy, Kokubo, Kenichi, Matsubara, Hirokazu, Wakai, Haruki, Yamashita, Akihiro C., and Kawanishi, Hideki

Published
2022
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14. Support for Dialysis Therapy in Vietnam, Cambodia, and Myanmar by Japanese Societies in the Field of Blood Purification

Author

Kokubo, Kenichi, primary, Kobayashi, Kozue, additional, Urabe, Sunichiro, additional, Matsubara, Hirokazu, additional, Naramura, Tomotaka, additional, Wakai, Haruki, additional, Naganuma, Toshihide, additional, Nakajima, Fumitaka, additional, Shibahara, Nobuhisa, additional, Hyodo, Toru, additional, Matsuda, Kenichi, additional, Yoshida, Kazunari, additional, Yamashita, Akihiro C., additional, and Kawanishi, Hideki, additional

Published
2017
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17. Comparison of transtibial and transportal techniques in drilling femoral tunnels during anterior cruciate ligament reconstruction using 3D-CAD models

Author

Tashiro,Yasutaka, Okazaki,Ken, Uemura,Munenori, Toyoda,Kazutaka, Osaki,Kanji, Matsubara,Hirokazu, Hashizume,Makoto, Iwamoto,Yukihide, Tashiro,Yasutaka, Okazaki,Ken, Uemura,Munenori, Toyoda,Kazutaka, Osaki,Kanji, Matsubara,Hirokazu, Hashizume,Makoto, and Iwamoto,Yukihide

Abstract

Yasutaka Tashiro,1 Ken Okazaki,1 Munenori Uemura,2 Kazutaka Toyoda,2 Kanji Osaki,1 Hirokazu Matsubara,1 Makoto Hashizume,2 Yukihide Iwamoto1 1Department of Orthopaedic Surgery, 2Department of Advanced Medical Initiatives, Kyushu University Hospital, Fukuoka, Japan Purpose: The purpose of this study was to assess the differences in bone tunnel apertures between the trans-accessory medial portal (trans-AMP) technique and the transtibial (TT) technique in double-bundle anterior cruciate ligament reconstruction. The extent of ovalization and the frequency of overlap of the two tunnel apertures were compared. Methods: The simulation of femoral tunnel drilling with the TT and the trans-AMP techniques was performed using three-dimensional computer aided design models from two volunteers. The incidence angle of drilling against the intercondylar wall, the femoral tunnel position, the ovalization, and the overlap were analyzed. The aperture and location of the tunnels were also examined in real anterior cruciate ligament reconstruction cases (n=36). Results: The surgical simulation showed that a lower drill incident angle induced by the TT technique made the apertures of two tunnels more ovalized, located anteromedial tunnels in a shallower position to prevent posterior wall blow out, and led to a higher frequency of tunnel overlap. The trans-AMP group had tunnel places within the footprint and had less ovalization and overlap. The results of analysis for tunnels in the clinical cases were consistent with results from the surgical simulation. Conclusion: In the TT technique, the shallow anteromedial tunnel location and more ovalized tunnel aperture can lead to a higher frequency of tunnel overlap. Compared with the TT technique, the trans-AMP technique was more useful in preparing femoral tunnels anatomically and avoiding tunnel ovalization and overlapping in double-bundle anterior cruciate ligament reconstruction. Keywords: anterior cruciate ligament, transtibial, transacce

Published
2014

20. Dialysis and Quality of Dialysate in Southeast Asian Developing Countries

Author

Naramura, Tomotaka, primary, Hyodo, Toru, additional, Kokubo, Kenichi, additional, Matsubara, Hirokazu, additional, Wakai, Haruki, additional, Nakajima, Fumitaka, additional, Shibahara, Nobuhisa, additional, Yoshida, Kazunari, additional, Komaru, Yoshinori, additional, Kawanishi, Hideki, additional, Kawamura, Akio, additional, Hidai, Hideo, additional, and Takesawa, Shingo, additional

Published
2014
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23. New Suture Method for Radial Tears of the Meniscus

Author

Matsubara, Hirokazu, primary, Okazaki, Ken, additional, Izawa, Toshiaki, additional, Tashiro, Yasutaka, additional, Matsuda, Shuichi, additional, Nishimura, Takuya, additional, Nakanishi, Yoshitaka, additional, Kawamura, Hideya, additional, and Iwamoto, Yukihide, additional

Published
2011
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30. Reply of the authors

Author

Katano, Kinue, primary, Ikuta, Katsuo, additional, Matsubara, Hirokazu, additional, Oya, Naomi, additional, Suzumori, Kaoru, additional, and Nishio, Masami, additional

Published
2000
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31. Comparison of transtibial and transportal techniques in drilling femoral tunnels duringanterior cruciate ligament reconstruction using 3D-CAD models.

Author

Tashiro, Yasutaka, Okazaki, Ken, Uemura, Munenori, Toyoda, Kazutaka, Osaki, Kanji, Matsubara, Hirokazu, Hashizume, Makoto, and Iwamoto, Yukihide

Subjects
DRILLING & boring, FEMUR surgery, ANTERIOR cruciate ligament surgery, COMPUTER-aided design, ADENOSINE monophosphate, COMPUTER simulation
Abstract

Purpose: The purpose of this study was to assess the differences in bone tunnel apertures between the trans-accessory medial portal (trans-AMP) technique and the transtibial (TT) technique in double-bundle anterior cruciate ligament reconstruction. The extent of ovalization and the frequency of overlap of the two tunnel apertures were compared. Methods: The simulation of femoral tunnel drilling with the TT and the trans-AMP techniques was performed using three-dimensional computer aided design models from two volunteers. The incidence angle of drilling against the intercondylar wall, the femoral tunnel position, the ovalization, and the overlap were analyzed. The aperture and location of the tunnels were also examined in real anterior cruciate ligament reconstruction cases (n=36). Results: The surgical simulation showed that a lower drill incident angle induced by the TT technique made the apertures of two tunnels more ovalized, located anteromedial tunnels in a shallower position to prevent posterior wall blow out, and led to a higher frequency of tunnel overlap. The trans-AMP group had tunnel places within the footprint and had less ovalization and overlap. The results of analysis for tunnels in the clinical cases were consistent with results from the surgical simulation. Conclusion: In the TT technique, the shallow anteromedial tunnel location and more ovalized tunnel aperture can lead to a higher frequency of tunnel overlap. Compared with the TT technique, the trans-AMP technique was more useful in preparing femoral tunnels anatomically and avoiding tunnel ovalization and overlapping in double-bundle anterior cruciate ligament reconstruction. [ABSTRACT FROM AUTHOR]

Published
2014
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38. Photoactive TiO2Containing Paper: Preparation and Its Photocatalytic Activity under Weak UV Light Illumination

Author

Matsubara, Hirokazu, Takada, Makoto, Koyama, Shinichi, Hashimoto, Kazuhito, and Fujishima, Akira

Abstract

TiO2-containing papers with highly photocatalytic activity have been prepared. Their photocatalytic activity was investigated by measuring the decomposition of gaseous acetaldehyde under illumination from a weak UV light source such as a conventional white fluorescent light bulb. It was found that the photocatalytic efficiency of the TiO2-containing papers was higher than that of Degussa P-25, one of the most efficient commercial TiO2powders, indicating that paper pulp serves as a good matrix for highly efficient TiO2photocatalysts.

Published
1995
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39. Femoral tunnel apertures on the lateral cortex in anterior cruciate ligament reconstruction: an analysis of cortical button fixation.

Author

Okazaki K, Matsubara H, Osaki K, Tashiro Y, Mizu-Uchi H, Hamai S, Doi T, and Iwamoto Y

Subjects
Adult, Anterior Cruciate Ligament surgery, Female, Humans, Male, Osteotomy instrumentation, Tomography, X-Ray Computed, Anterior Cruciate Ligament Reconstruction methods, Femur surgery, Osteotomy methods
Abstract

Purpose: If the aperture of the oval-shaped femoral tunnel on the lateral cortex becomes bigger than half the size of the cortical button, the risk of fixation failure increases. This study investigated the effect of the location of the entry point and diameter of the femoral tunnel on the length of the major axis of the tunnel aperture in anterior cruciate ligament (ACL) reconstruction using an outside-in technique., Methods: Simulation of femoral tunnel drilling was performed on computed tomography (CT)-based 3-dimensional (3D) bone models obtained from 40 participants. The tunnel connected the center of the ACL footprint and various points on the lateral femoral surface. The diameter of the tunnel was set at 4.2 mm, 5.2 mm, or 6 mm, depending on the commercially available outside-in surgical systems (Arthrex, Naples, FL and Smith & Nephew, Andover, MA). The length of the major axis of the oval-shaped aperture on the lateral femoral surface was measured., Results: When the tunnel was introduced at 2 cm from the lateral epicondyle in a 45° anteroproximal direction, the major axis was lengthened to 130.7% ± 9.0% (P < .001) of the tunnel diameter, and it was more than 6.5 mm in 65% of participants in whom a 5.2-mm-diameter tunnel was drilled. When the entry point was 3 cm from the lateral epicondyle, 60% of participants had an oval-shaped aperture with a major axis of more than 6.5 mm, even though the diameter of the tunnel was only 4.2 mm., Conclusions: The risk of fixation failure of a cortical button increases if the entry point for drilling is 2 cm or further from the lateral epicondyle and the tunnel diameter is more than 5 mm., Clinical Relevance: This study indicates the potential risk of cortical button fixation failure caused by an oval tunnel aperture on the lateral femoral surface in ACL reconstruction using the outside-in technique., (Copyright © 2014 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.)

Published
2014
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