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Affiliation |
Graduate School of Medicine Doctorial Course in Medicine Organ Function-Oriented Medicine Department of Orthopedic Surgery |
KIMURA Ryota
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Research Interests 【 display / non-display 】
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spine
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orthopedic surgery
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rehabilitation robot
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exercise
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rehabilitation
Graduating School 【 display / non-display 】
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-2011.03
Akita University Faculty of Medicine Graduated
Graduate School 【 display / non-display 】
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-2019.03
Akita University Graduate School, Division of Medicine Doctor's Course Completed
Campus Career 【 display / non-display 】
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2022.12-Now
Akita University Graduate School of Medicine Doctorial Course in Medicine Organ Function-Oriented Medicine Department of Orthopedic Surgery Assistant Professor
Research Achievements 【 display / non-display 】
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Curve progression and risk factors in patients of adolescent idiopathic scoliosis with Risser sign grade 4
Wakabayashi Rena, Hongo Michio, Misawa Akiko, Kimura Ryota, Kudo Daisuke, Shimada Yoichi, Miyakoshi Naohisa
Journal of Spine Research ( The Japanese Society for Spine Surgery and Related Research ) 14 ( 11 ) 1377 - 1382 2023.11
<p><b>Introduction: </b>Brace treatment for adolescent idiopathic scoliosis (AIS) is usually indicated for patients with Risser sign grade 0-3, but not for above grade 4. However, we occasionally see patients whose curves progress even in patients with Risser sign grade 4. We examine Cobb angle progression and risk factors in Risser sign grade 4 cases of AIS.</p><p><b>Methods: </b>From January 2016 to December 2020, 42 AIS patients with Risser sign grade 4 at the first visit to our clinic and were followed up for at least 1 year were included. Patient background, physical findings, and radiological measurements including the Cobb angles were evaluated. Patients were divided into progressive and non-progressive groups to compare their risk factors of scoliosis.</p><p><b>Results: </b>Eight patients were in the progressive group and 34 were in the non-progressive group. In the progressive group, the Cobb angle increased by 7.1 degrees, from 28.7 to 35.8 degrees. The time since menarche was significantly shorter in the progressive group (9.7 months) than in the non-progressive group (24.2 months) (P=0.003). Growth in height was significantly greater in the progressive group (+2.9 cm) than in the non-progressive group (+1.8 cm) (P = 0.02). There were no differences in the other factors.</p><p><b>Conclusions: </b>In this study, curves progressed in approximately 20% of patients with Risser sign grade 4. In cases with short time since menarche or potential for height growth, AIS patients with Risser sign grade 4 may need to take brace therapy.</p>
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Status and issue of scoliosis screening in Akita
Misawa Akiko, Hongo Michio, Kudo Daisuke, Wakabayashi Rena, Kimura Ryota, Shimada Yoichi, Miyakoshi Naohisa
Journal of Spine Research ( The Japanese Society for Spine Surgery and Related Research ) 14 ( 11 ) 1366 - 1371 2023.11
<p><b>Introduction: </b>In Akita Prefecture, school screening using the Moiré topography have been conducted since 1984, and have been continued after the start of musculoskeletal screening. In this study, we compared the results of the scoliosis examination using the Moiré screening with those of the musculoskeletal screening using data provided by the Akita City Board of Education.</p><p><b>Methods: </b>From 2017 to 2020, 1,442 patients with spinal column findings in musculoskeletal screening and 474 patients with Moiré screening findings underwent secondary examination.</p><p><b>Results: </b>The positive predictive value for the Cobb angle of 10 degrees or more was 39% in the musculoskeletal screening, and 60% in the Moiré screening. The positive predictive value of scoliosis in junior high school students was 57% for the musculoskeletal screening, which was similar to that for the Moiré screening. 13% of the diagnosed cases were newly positive for the musculoskeletal screening and 87% were continuously positive, and most of the cases were diagnosed with scoliosis by the Moiré screening.</p><p><b>Conclusions: </b>The results of this study have once again demonstrated the usefulness of Moiré screening in comparison with musculoskeletal screening. In order to promote the use of Moiré screening, it is necessary to improve the follow-up system after the screening. In addition, it is necessary to approach and cooperate with boards of education and medical associations for the development of medical checkups to resolve issues such as the protection of personal information in order to provide feedback on the results of medical checkups.</p>
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Study of surgical intervention for quadriceps tendon rupture
ASAKA Yasuhito, KIMURA Ryota, KOBAYASHI Takashi, SAITO Hidetomo, MIYAKOSHI Naohisa
Journal of the Eastern Japan Association of Orthopaedics and Traumatology ( The Eastern Japan Association of Orthopaedics and Traumatology ) 34 ( 2 ) 116 - 118 2022
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Development of an Automatic Adjustment System for the Amount of Assist Using Reinforcement Learning in Gait Rehabilitation Robot for Hemiplegic Patients
Maeda Kai, Iwami Takehiro, Kimura Ryota, Shimada Yoichi
The Japanese Journal of the Institute of Industrial Applications Engineers ( The Institute of Industrial Applications Engineers ) 10 ( 1 ) 28 - 37 2022
We have developed a gait training rehabilitation robot “Akita Trainer" for hemiplegic patients. It has servomotors attached to the hip and knee joints of the exoskeleton, and driving it enables gait rehabilitation of the paralyzed people. As its core systems, we developed a variable assist system and an automatic assist adjustment system. The variable assist system based on compliance control can change the stiffness parameter of “Akita Trainer" to provide assist torque according to the degree of paralysis. The automatic assist adjustment system uses reinforcement learning to change the stiffness parameter to the optimal value for the paralyzed people while using this robot. We conducted an experiment with three healthy subjects to validate the combined system of both. We set up two walking patterns: , normal walking and pseudo-hemiplegic walking assuming right hemiplegia. The participants walked for 10 minutes on the treadmill at a speed of 0.8 km/h. The amount of assistance decreased for normal walking and increased for pseudo-hemiplegic walking, indicating that the optimal amount of assistance can be provided according to the walking patterns. By using this system, it is possible to perform gait rehabilitation with the optimal assist torque for the hemiplegic people.
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Akita Trainer: Rehabilitation robot from Akita
KIMURA Ryota, SHIMADA Yoichi
Bulletin of the Japanese Society of Prosthetics and Orthotics ( Japanese Society of Prosthetics and Orthotics ) 36 ( 3 ) 189 - 190 2020.07
◆Other【 display / non-display 】
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Grant-in-Aid for Early-Career Scientists
Project Year： 2023.04 - 2026.03