Curriculum Vitaes
Profile Information
- Affiliation
- School of Health Sciences Faculty of Rehabilitation, Fujita Health University
- Degree
- 博士(医学)
- Other name(s) (e.g. nickname)
- Kei Ohtsuka
- J-GLOBAL ID
- 201501002462159128
- researchmap Member ID
- 7000013043
Research Areas
1Papers
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International journal of rehabilitation research. Internationale Zeitschrift fur Rehabilitationsforschung. Revue internationale de recherches de readaptation, 46(4) 316-324, Dec 1, 2023Ankle-foot orthosis (AFO) is known to correct abnormal gait patterns and improve walking stability and speed in patients with hemiparesis. To quantify these benefits in post-stroke gait, a three-dimensional motion analysis of gait pattern was conducted. Forty patients with hemiparesis were enrolled. A three-dimensional motion analysis system was used to analyze patients' treadmill walking with/without an AFO. Outcome measures were 12 abnormal gait indices (forefoot contact, knee extensor thrust, retropulsion of the hip, flexed-knee gait, medial whip in the stance phase, circumduction gait, hip hiking, insufficient knee flexion during the swing phase, excessive lateral shifting of the trunk, contralateral vaulting, excessive hip external rotation, and posterior pelvic tilt), calculated using kinematic data and spatiotemporal indices, and the symmetry index of double-stance and single-stance time and step length. Forefoot contact (without AFO vs. with AFO: 71.0 vs. 65.8, P < 0.001), circumduction gait (65.0 vs. 57.9, P < 0.001), and contralateral vaulting (78.2 vs. 72.2, P = 0.003) were significantly reduced, whereas excessive hip external rotation (53.7 vs. 62.8, P = 0.003) significantly increased during walking with an AFO. Hip hiking (77.1 vs. 71.7) showed marginal reduction with the use of AFO ( P = 0.096). The absolute symmetry index of double-stance time (21.9 vs. 16.1, P = 0.014) significantly decreased during walking with an AFO. AFO effectively mitigates abnormal gait patterns typical of hemiparetic gait. A 3D motion analysis system with clinically oriented indices can help assess intervention efficacy for gait abnormalities.
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Fujita medical journal, 9(4) 282-287, Nov, 2023OBJECTIVES: The purpose of this study was to capture the lifestyle characteristics of traumatic brain injury (TBI) patients by administering the Frenchay Activities Index (FAI), a self-assessment questionnaire used for assessing life-related activities, among TBI patients. METHODS: This study was conducted using the revised FAI Self-Assessment Form, administering an interview-based questionnaire survey to TBI patients and healthy participants. The target group comprised 60 traumatic brain injury patients who had progressed from at least 1 year since the injury, with a comparison group of 788 healthy participants. RESULTS: A comparison of FAI scores between TBI patients and healthy participants by questionnaire revealed that TBI patients exhibited significantly higher FAI scores than healthy participants for outdoor walking and transportation use (Mann-Whitney U test, P<0.01). A comparison by occupation revealed that TBI patients were significantly less among the unemployed and other categories (Mann-Whitney U test, P<0.01). For office workers, government employees, high school students, and college students, scores were higher among TBI patients compared with healthy participants, although the differences were not significant. CONCLUSIONS: Although TBI patients were less active than healthy participants in life-related activities, their scores for cleaning up after meals and cleaning and putting things in order were close to those of healthy participants, indicating that TBI patients cannot be considered to be inactive. The findings also revealed differences in TBI patients' engagement in life-related activities and frequency of activities depending on their social position.
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Fujita medical journal, 9(4) 288-294, Nov, 2023OBJECTIVES: This study investigates how online frame-of-reference (FOR) training of raters of the objective structured clinical examination (OSCE) for physical therapy students affects assessment accuracy. METHODS: The research was conducted in a 1-month-long randomized controlled trial. PARTICIPANTS: The participants were 36 physical therapists without experience assessing clinical skills using the OSCE. The training group completed the FOR training online, which was conducted once a week in two 90-minute sessions. The control group self-studied the rubric rating chart used in the assessment. As a measure of accuracy, weighted kappa coefficients were used to check the agreement between correct score and those assessment by the participant in the OSCE. RESULTS: The scores of the training group were higher than those of the control group in both post- and follow-up assessments, showing significant differences. No significant difference was found based on the assessment time and group for the high-agreement groups. Furthermore, scores of the low-accuracy training group were higher in the post- and follow-up assessments than those in the pre-assessment, showing significant differences. CONCLUSIONS: Online FOR training of the raters of the OSCE for physical therapists improved the assessment accuracy of the raters who had low accuracy in the pre-assessment; this improvement was maintained.
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理学療法教育, 3(1) 28-36, Apr, 2023目的:本研究の目的は,理学療法士・作業療法士教育における臨床教育者の指導経験が診療参加型臨床実習に及ぼす影響について検証することである。方法:対象は藤田医科大学の教育病院において臨床実習を経験した理学および作業療法専攻の学生とし,臨床教育者の診療参加型臨床実習指導経験が無い群(CE未経験群)48名と有る群(CE経験群)49名の2群に分け,臨床実習中の学生のストレス状態,基本的姿勢,睡眠状態を比較した。結果:CE経験群では,CE未経験群と比較し,臨床実習中の対人関係,適性度,イライラ感のストレスが減少し,実習の満足度が増加していた。また,基本的姿勢の評価の点数は高かった。一方で,睡眠状態は,CE未経験群に比較してCE経験群では「不眠症なし」と判定された割合は減少し,「軽度不眠症」と判定された割合は増加していた。結論:指導経験ある臨床教育者による実習では,学生のストレスは軽減し,基本的姿勢の評価は向上するものの,睡眠状態に関しては,一定数の睡眠障害のある学生は残存し,心理面のサポートとともに,自宅での学習状況や睡眠時間を留意しながら指導する必要性が示唆された。(著者抄録)
Misc.
146-
The Japanese Journal of Rehabilitation Medicine, 55(秋季特別号) S123-S123, Oct, 2018
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The Japanese Journal of Rehabilitation Medicine, 55(特別号) 4-KP, May, 2018
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The Japanese Journal of Rehabilitation Medicine, 54(秋季特別号) S270-S270, Sep, 2017
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The Japanese Journal of Rehabilitation Medicine, 54(特別号) 1-12, May, 2017
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Japanese Journal of Comprehensive Rehabilitation Science, 6(2015) 33-42, Jan, 2016【目的】本研究の目的は,トレッドミル歩行の三次元動作分析で表現できるリサージュ図形を用いたリサージュ概観図(LOP)の有用性を検討することである.【方法】健常者19名,片麻痺患者2名,変形性股関節症患者1名を対象に三次元トレッドミル歩行分析を実施し,LOPを作成した.また,歩行分析に熟練した理学療法士3名が患者3名の歩行を視診で評価した.健常者のリサージュ図形は平均化し,作成した健常者グランドアベレージLOPと患者3名を比較した.【結果】患者のLOPは,片麻痺者で遊脚期の分回し,トゥクリアランス低下,骨盤挙上,立脚期の内側ホイップを,変形性股関節症患者では両側性デュシェンヌ徴候,立脚期の過剰な膝関節の屈曲など視診で認めた所見に加え,視診のみでは観察できなかった多数の所見を表していた.【結論】各肢節の運動パターンだけでなく肢節間の位置関係から姿勢や対称性といった歩行の全体像を理解できた.(著者抄録)
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Japanese Journal of Comprehensive Rehabilitation Science, 6(2015) 137-142, Jan, 2016【目的】Hand-held dynamometerによる股関節外転筋力測定において,非測定下肢機能が測定値に与える影響を明らかにすること.【方法】健常者30名と片麻痺患者59名を対象とし,背臥位で両側股関節外転筋力を,非測定下肢を固定する方法(固定法)としない方法(非固定法)で測定した.同一法における左右および麻痺側・非麻痺側,固定法と非固定法での測定値を比較し,片麻痺患者では麻痺側筋力を従属変数,非麻痺側筋力と麻痺の程度を独立変数として重回帰分析を行った.【結果】非固定法の計測値が固定法よりも有意に小さかった.健常者では非測定下肢の固定によらず左右の相関が高かったが,片麻痺患者では非固定法において相関が低かった.重回帰分析の結果,固定法における麻痺側筋力は非麻痺側下肢機能の影響を強く受けていた.【考察】固定法では非測定下肢機能の影響を受け,測定下肢の筋力を正確に反映していないと考えられた.(著者抄録)
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Japanese Journal of Comprehensive Rehabilitation Science, 6(2015) 33-42, Jan, 2016【目的】本研究の目的は,トレッドミル歩行の三次元動作分析で表現できるリサージュ図形を用いたリサージュ概観図(LOP)の有用性を検討することである.【方法】健常者19名,片麻痺患者2名,変形性股関節症患者1名を対象に三次元トレッドミル歩行分析を実施し,LOPを作成した.また,歩行分析に熟練した理学療法士3名が患者3名の歩行を視診で評価した.健常者のリサージュ図形は平均化し,作成した健常者グランドアベレージLOPと患者3名を比較した.【結果】患者のLOPは,片麻痺者で遊脚期の分回し,トゥクリアランス低下,骨盤挙上,立脚期の内側ホイップを,変形性股関節症患者では両側性デュシェンヌ徴候,立脚期の過剰な膝関節の屈曲など視診で認めた所見に加え,視診のみでは観察できなかった多数の所見を表していた.【結論】各肢節の運動パターンだけでなく肢節間の位置関係から姿勢や対称性といった歩行の全体像を理解できた.(著者抄録)
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日本理学療法学術大会(Web), 50th O-0338(J-STAGE)-0338, Apr, 2015
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MEDICAL REHABILITATION, (181) 27-33, Mar, 2015頸髄症患者の特徴的な歩行障害として、痙性歩行と失調性歩行がある。痙性歩行は、脊髄が障害を受け筋緊張の亢進の影響で下肢が突っ張ってしまい、床を引きずるような歩容を呈し、足底接地時には足や膝のクローヌスが出現し、運動がぎこちなくなる。痙性歩行の他にも尖足歩行、分回し歩行、はさみ足歩行、アヒル様歩行などの異常歩行が出現する。失調性歩行の特徴は、下肢を前に投げ出すように踵を床に叩きつけるように接地して歩く踵打ち歩行がある。また、頸髄症患者は、健常者と比較すると歩幅が短く、歩行率が減少し、歩行速度が低下する。歩行周期の特徴は、麻痺により支持性が低下するため単脚支持期割合が減少、両脚支持期割合が増加、歩隔が拡大する。その他にも上肢機能障害や手指巧緻性低下によって歩行補助具の使用困難などが問題となることが多い。本稿では、三次元トレッドミル歩行分析を実施した頸髄症患者を呈し、リサージュ概観図を用いた分析法を紹介する。(著者抄録)
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The Japanese Journal of Rehabilitation Medicine, 51(Suppl.) S447-S447, May, 2014
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The Japanese Journal of Rehabilitation Medicine, 51(Suppl.) S462-S462, May, 2014
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MEDICAL REHABILITATION, (156) 57-65, Apr, 2013近年、進歩している多種の歩行分析機器は臨床ではほとんど活用されていない。トレッドミル歩行分析は省空間・省時間性、多数歩計測の容易性、手すり・懸垂補助による低歩行能力者計測、多様な運動表現などの利点を生かし、歩行分析機器の臨床導入を可能にする手段である。また、三次元動作解析を用いたトレッドミル歩行分析は、リサージュ図形の表現に有利であり、運動の再現性や運動パターンの分析の指標として活用できる。筆者らはリサージュ図形を活用した新しい表現法:リサージュ概観図を開発した。リサージュ概観図はトレッドミル歩行時の身体10個のマーカと合成重心のリサージュ図形を平面上(矢状面、前額面、水平面)に表したものである。リサージュ概観図は肢節の各運動軌跡と肢節間の相対的な位置関係を表現しており、歩行の概観を直感的にイメージしやすく、視診との親和性が高いと考えられる。(著者抄録)
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Bulletin of the Japanese Society of Prosthetic and Orthotic Education, Research and Development, 29(2) 90-97, Apr, 2013Japan is entering the era of the unprecedented super-aged society. We will have many elderly and disabled people. In this situation, the emergence of rehabilitation robotics is highly anticipated. Fujita Health University is developing five kinds of rehabilitation robots ; (1) WPAL is a new gait-assist robot which reconstructs practical walking in paraplegics. (2) Independent Gait Assist is designed to assist patients with hemiplegia or lower extremity monoplegia to walk safely and comfortably. (3) Gait Exercise Assist is the robot which provides new and effective gait exercise for stroke patients with hemiplegia. (4) Balance Exercise Assist produces new balance exercises which have a lot of merits from the viewpoint of motor-learning. (5) Transfer Care Assist is aimed at reducing the physical load of caregivers, assisting the transfer and toileting of patients. Rehabilitation robots are just being realized.
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Clinics and Practice 2013, 3(30) 84-86, 2013 Peer-reviewed
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Journal of Physical Therapy Science, 25(1) 41-43, Jan, 2013 Peer-reviewedAbstract. [Purpose] The purpose of this study was to examine the locus of the center of pressure (COP) of standing postures with different feet positions. [Subjects] Sixty healthy young adults participated in the experiments as subjects. [Methods] The COP was measured using a force plate. Subjects stabilized themselves on the force plate, and the change of the COP trajectory was measured for 30 s. The COP was measured in three standing postures: wide-base, tandem, and one-foot standing. The relative center of anterior-posterior sway was examined as a proportion of the base of support length. [Results] Using one foot length, l, measured from the heel to the toe of the foot as a standard, the mean of the center of anterior-posterior sway was 44.5 ± 5.5% of l in the wide-base stance, 50.2 ± 4.4% of l in the one-foot dominant stance, and 50.4 ± 4.3% of l in the one-foot non-dominant stance. Since the length of the feet is 2l in the tandem posture, the mean of the center of anterior-posterior sway was 41.0 ± 7.0% of 2l with the dominant foot in front and 41.5 ± 6.0% of 2l with the non-dominant foot in front. [Conclusion] The mean of the center of anterior-posterior sway was inclined toward the anterior position in single leg standing compared to the wide base standing. In tandem standing, the COP was located on the rear foot. The results of this study might be useful in considering the mechanism of postural control of patients with hemiplegia.
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Bulletin of the Japanese Society of Prosthetic and Orthotic Education, Research and Development, 28(2) 87-92, Apr, 2012
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Japanese Journal of Comprehensive Rehabilitation Science3, 2012 Peer-reviewed
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理学療法, 27(12) 1407-1414, Dec, 20101.運動学習という視点から、脳卒中の歩行障害に対する介入を解説した。2.適切な課題とは、目標スキルへの転移性を持った最適な難易度に調整された課題である。3.装具療法の目的は「自由度制約を通じた運動の単純化」であり、装具は自由度制約を通じて難易度の調整性に役立つ。4.トレッドミル歩行訓練は、速度調整による難易度設定だけではなく、ハーネスによる懸垂を活用した部分法による難易度設定も可能である。5.運動課題の設定は、治療者の介助を軽度介助に留め、道具の活用、残存機能の活用、動作パターンによる容易化を優先させる。(著者抄録)
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総合リハビリテーション, 38(12) 1175-1181, Dec, 2010 Peer-reviewed[目的]視診による異常歩行重症度スコアリングの評価者間信頼性を検討した.[方法]臨床経験6年以上の理学療法士10名を評価者とし,片麻痺患者13名のトレッドミル歩行ビデオ画像を観察させ,分回し歩行とトゥクリアランス低下の重症度を5段階評価させた結果の評価者間信頼性をCohenのκ係数を用いて検討した.また,評価者を経験年数と観察した部位・相で分け,κ係数を求めた.[結果]評価結果のκ係数は0.09〜0.58であり,経験年数にかかわらず低かった.観察部位・相を揃えた群のκ係数も0.03〜0.32と低かった.[考察]一致率の程度はslight〜moderateにとどまり,評価者間信頼性は低かった.観察部位・相を揃えても信頼性は向上せず,評価者の主観的尺度と評価基準の相違が主な原因と思われた.視診による歩行分析の信頼性を高めるには,異常歩行を定義したうえで,明確な重症度基準を定める必要があると考えられた.(著者抄録)
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臨床理学療法研究, 27 55-59, Jul, 2010 Peer-reviewed
Books and Other Publications
5Presentations
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7th World Congress of the International Society of Physical and Rehabilitation Medicine, Jun, 2013
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4th World Congress of the International Society of Physical and Rehabilitation Medicine, Jun, 2007
Research Projects
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2022 - Mar, 2025
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科学研究費助成事業, 日本学術振興会, Apr, 2020 - Mar, 2023
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2016 - Mar, 2019
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2011 - 2013
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2009 - 2012