Harato, Kengo



School of Medicine, Department of Orthopaedic Surgery (Shinanomachi)


Assistant Professor/Senior Assistant Professor

Academic Background 【 Display / hide

  • 1993.04

    Keio University, 医学部

    University, Graduated

Academic Degrees 【 Display / hide

  • 医学博士, Keio University


Research Areas 【 Display / hide

  • Life Science / Orthopedics

Research Keywords 【 Display / hide

  • 膝関節


Books 【 Display / hide

  • 変形性膝関節症とその鑑別疾患,X線像で診る下肢 第Ⅲ章膝関節

    南江堂, 2011

  • リハビリテーションプロトコール第2版 整形外科疾患へのアプローチ 4膝の損傷

    メディカルサイエンスインターナショナル, 2010

Papers 【 Display / hide

  • Stat3 as a potential therapeutic target for rheumatoid arthritis

    Oike, Takatsugu, Sato, Yuiko, Kobayashi, Tami, Miyamoto, Kana, Nakamura, Satoshi, Kaneko, Yosuke, Kobayashi, Shu, Harato, Kengo, Saya, Hideyuki, Matsumoto, Morio, Nakamura, Masaya, Niki, Yasuo, Miyamoto, Takeshi


    Research paper (scientific journal),  ISSN  2045-2322

  • Local infiltration of analgesia and sciatic nerve block provide similar pain relief after total knee arthroplasty

    Tanikawa, Hidenori, Harato, Kengo, Ogawa, Ryo, Sato, Tomoyuki, Kobayashi, Shu, Nomoto, So, Niki, Yasuo, Okuma, Kazunari


    Research paper (scientific journal),  ISSN  1749-799X

  • Self-flip Technique of the TightRope RT Button for Soft-Tissue Anterior Cruciate Ligament Reconstruction

    Harato Kengo, Niki Yasuo, Toyoda Takashi, Kamata Yusaku, Masumoto Ko, Otani Toshiro, Suda Yasunori

    Arthroscopy Techniques 5 ( 2 ) e391 - e395 2016.04

    ISSN  2212-6287

     View Summary

    <p>The TightRope RT (Arthrex, Naples, FL) is a suspensory device for anterior cruciate ligament reconstruction. However, there is a potential risk of the button being pulled too far off the lateral femoral cortex into the soft tissue because the adjustable loop is long. The purpose of this article is to present an easy and safe technique for self-flip. As to the preparation of the graft, we draw the first line in the loop of the TightRope RT at the same length as the femoral tunnel, and we draw the second line 7 mm longer than the length of the femoral tunnel as a self-flip line. Concerning passing of the graft, the side sutures are pulled from the lateral side. We stop pulling the sutures just at the self-flip line by holding the graft at the tibial end. The side suture is inclined to the medial side with strong pulling of the suture at full extension of the knee. Then the surgeon pulls the tibial end of the graft to feel a secure positioning of the button on the lateral femoral cortex. Although it has limitations, the present technique is easy and certainly helps surgeons achieve appropriate positioning of the button.</p>

  • What are the important surgical factors affecting the wound healing after primary total knee arthroplasty?

    Harato Kengo, Tanikawa Hidenori, Morishige Yutaro, Kaneda Kazuya, Niki Yasuo

    Journal of Orthopaedic Surgery and Research  2016.01

     View Summary

    <p>Background: Wound condition after primary total knee arthroplasty (TKA) is an important issue to avoid any postoperative adverse events. Our purpose was to investigate and to clarify the important surgical factors affecting wound score after TKA. Methods: A total of 139 knees in 128 patients (mean 73 years) without severe comorbidity were enrolled in the present study. All primary unilateral or bilateral TKAs were done using the same skin incision line, measured resection technique, and wound closure technique using unidirectional barbed suture. In terms of the wound healing, Hollander Wound Evaluation Score (HWES) was assessed on postoperative day 14. We performed multiple regression analysis using stepwise method to identify the factors affecting HWES. Variables considered in the analysis were age, sex, body mass index (kg/m2), HbA1C (%), femorotibial angle (degrees) on plain radiographs, intraoperative patella eversion during the cutting phase of the femur and the tibia in knee flexion, intraoperative anterior translation of the tibia, patella resurfacing, surgical time (min), tourniquet time (min), length of skin incision (cm), postoperative drainage (ml), patellar height on postoperative lateral radiographs, and HWES. HWES was treated as a dependent variable, and others were as independent variables. Results: The average HWES was 5.0 ± 0.8 point. According to stepwise forward regression test, patella eversion during the cutting phase of the femur and the tibia in knee flexion and anterior translation of the tibia were entered in this model, while other factors were not entered. Standardized partial regression coefficient was as follows: 0.57 in anterior translation of the tibia and 0.38 in patella eversion. Conclusions: Fortunately, in the present study using the unidirectional barbed suture, major wound healing problem did not occur. As to the surgical technique, intraoperative patella eversion and anterior translation of the tibia should be avoided for quality cosmesis in primary TKA.</p>

  • Anterior cruciate ligament reconstruction does not fully restore normal 3D knee kinematics at 12 months during walking and walk-pivoting

    Hasegawa Takayuki, Otani Toshiro, Takeda Kentaro, Matsumoto Hideo, Harato Kengo, Toyama Yoshiaki, Nagura Takeo

    Journal of Applied Biomechanics 31 ( 5 ) 330 - 339 2015.10

    ISSN  1065-8483

     View Summary

    <p>The purpose of the current study was to longitudinally evaluate how preoperative knee kinematics change after ACL reconstruction. Three-dimensional gait analysis using the point cluster method was undertaken on the same subjects preoperatively and at 3, 6, and 12 months after ACL reconstructive surgery. Thirteen subjects (7 males, 6 females) were examined while performing 2 different activities at self-selected speeds: walking and walk-pivoting (walking, pivoting toward the landed limb side and walking away). The contralateral knees of subjects at 12 months postoperatively were selected as control knees. Flexion range in the stance phase increased with time after surgery, but remained lower than in the contralateral knee, even at 12 months postoperatively (P &lt;.05) during walking and walk-pivoting. The rotation pattern during walking and walk-pivoting showed an offset toward external rotation by 6 months postoperatively compared with control knees, while at 12 months postoperatively the offset had nearly disappeared and the movement pattern resembled that in control knees. These findings suggest that a return to sport participation by 6 months after ACL reconstruction requires careful consideration. Depending on the type of sport, activity restriction even after 12 months may need to be considered to allow complete kinematic restoration.</p>

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Papers, etc., Registered in KOARA 【 Display / hide

Presentations 【 Display / hide

  • What are the differences of surgical time between beginners and experts in primary total knee arthroplasty?



  • What are the important surgical factors affecting the wound healing after primary total knee arthroplasty?



  • 初心者の人工膝関節置換術における自分の指導は適切だったか?



  • What Is the Important Maneuver Necessary for Novice Surgeons to Minimize a Surgical Time in Total Knee Arthroplasty?



  • 駆血を使用しない前十字靭帯再建術とその評価



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Research Projects of Competitive Funds, etc. 【 Display / hide

  • Investigation of novel dynamic evaluation method for prevention of anterior cruciate ligament injury and reinjury after reconstruction


    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

  • 関節圧に基づく新しい人工膝関節手技の確立


    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator


Courses Taught 【 Display / hide











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Courses Previously Taught 【 Display / hide

  • 整形外科 膝から下腿

    Keio University


    Lecture, Within own faculty

  • 膝関節・下腿

    Keio University


    Full academic year, Lecture, 50people