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Kōbe-shi, Japan

Shibanoki T.,Hiroshima University | Shima K.,Hiroshima University | Takaki T.,Hiroshima University | Kurita Y.,Hiroshima University | And 3 more authors.
2012 ICME International Conference on Complex Medical Engineering, CME 2012 Proceedings | Year: 2012

This paper introduces a motion and channel selection method based on a partial Kullback-Leibler (KL) information measure. In the proposed method, the probability density functions of recorded data are estimated through learning involving a probabilistic neural network based on the KL information theory. Partial KL information is defined to support evaluation of the contribution of each dimension and class for classification. Effective dimensions and classes can then be selected by eliminating ineffective choices one by one based on this information, respectively. In the experiments, effective channels for classification were first selected for each of the six subjects, and the number of channels was reduced by 32.1 ± 25.5%. After channel selection, appropriate motions for classification were chosen, and the average classification rate for the motions selected using the proposed method was found to be 91.7 ± 2.5%. These outcomes indicate that the proposed method can be used to select effective channels and motions for accurate classification. © 2012 IEEE. Source


Matsumoto T.,Kobe University | Kubo S.,Kobe University | Muratsu H.,Steel Memorial Hirohata Hospital | Matsushita T.,Kobe University | And 9 more authors.
Knee Surgery, Sports Traumatology, Arthroscopy | Year: 2013

Purpose: In order to permit soft tissue balance under more physiological conditions during total knee arthroplasties (TKAs), an offset-type tensor was developed to obtain soft tissue balancing throughout the range of motion with reduced patello-femoral (PF) and aligned tibiofemoral joints. The main purpose of the present study was to assess intra-operative soft tissue balance using a navigation system with the offset-type tensor in both cruciate-retaining (CR) and posterior-stabilized (PS) TKAs. Methods: One hundred and twenty TKAs-80 CR and 40 PS-were performed in patients with varus-type osteoarthritis using a computed tomography-free navigation system. The offset-type TKA tensor with a reduced and repaired PF joint and femoral component in place was used with the tibia first gap technique to balance soft tissues (joint component gap and ligament balance) at 0°, 10°, 30°, 60°, 90°, and 120° of flexion. The achievement in equalized rectangular gap at extension and flexion-joint component gap within ±3 mm between extension and flexion and ligament balance within ±3° at extension and flexion-was assessed retrospectively. Results: Both types of implants showed similar patterns of soft tissue balance throughout the range of motion, whereas PS TKA had larger values especially at 60° or 90° of flexion than did CR TKA. In the achievement of equalized rectangular gaps at extension and flexion, CR TKA was superior to PS TKA. Conclusion: Using the tibia first gap technique with the tensor allows appropriate soft tissue balancing, especially in CR TKA. Level of evidence: Therapeutic studies, Level II. © 2013 Springer-Verlag Berlin Heidelberg. Source


Chin T.,Hyogo Rehabilitation Center | Chin T.,Kobe University | Toda M.,Hyogo Rehabilitation Center
Journal of International Medical Research | Year: 2016

Objective: To investigate the effect of a standardized silicone liner programme on the duration of prosthetic rehabilitation in patients who underwent transtibial amputation as a result of peripheral arterial disease. Methods: This retrospective study enrolled patients who underwent transtibial amputation followed by one of two stump management programmes at the same rehabilitation centre over a period of 14 years. The study compared the duration of rehabilitation following a standardized silicone liner programme compared with that following a conventional soft dressing programme. Results: This study included 16 patients who underwent the silicone liner programme and 11 patients who underwent the soft dressing programme. There were no significant differences between the two groups in age, sex, interval between amputation and admission to the rehabilitation centre and stump length. The duration required for the completion of the rehabilitation programme was significantly shorter for the silicone liner programme compared with the soft dressing programme (mean ± SD: 77.3 days ± 13.4 versus 125.4 days ± 66.4 days, respectively). Conclusion: A standardized silicone liner programme reduced the duration of rehabilitation and could be a valuable replacement for soft dressing-based stump management. © 2016, © The Author(s) 2016. Source


Toda M.,Hyogo Rehabilitation Center | Chin T.,Hyogo Rehabilitation Center | Chin T.,Kobe University | Shibata Y.,Hyogo Rehabilitation Center | Mizobe F.,Hyogo Rehabilitation Center
PLoS ONE | Year: 2015

Background: There has been no research investigating the use of powered prosthetic for children in Japan. Objective: To gain better insight into the state of powered prosthesis usage and identify a ratio of rejection among children. Methods: Subjects were 37 unilateral below elbow amputees between the ages of 0 and 16 at the time of their first experienced fitting with a powered prosthesis at our Center. The information was collected from medical records and through face-to-face interviews, and we examined rejection rate and the factors affecting the use of powered prosthesis. Results: The rate of discontinuation was 21.6% as 8 of the 37 children stopped using powered prosthesis. All of them were fitted their prosthesis after 2 years of age, and they rejected prosthesis between 5 to 19 years. We found that the level of amputation had no influence on the use of a powered prosthesis. Conclusions: Children fitted before 2 years of age tend to accept their powered prosthesis than those fitted after 2 years. Multidisciprinary team approach, adequate rehabilitation, detailed followup and involvement of parents are quite important for introducing powered prosthesis for children. © 2015 Toda et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Source


Hara Y.,Hyogo Assistive Technology Research and Design Institute | Matsubara H.,Hyogo Assistive Technology Research and Design Institute | Shibata Y.,Hyogo Rehabilitation Center | Mizobe F.,Hyogo Rehabilitation Center | And 5 more authors.
Electronics and Communications in Japan | Year: 2010

The aim of this study was to develop a new evaluation method for controlling skill of a myoelectric control hand (MCH). Four amputees who daily used the MCH participated in this study. Measurement of two signals which were needed to control motion of the MCH was made. The two signals were assigned as the average rectified electromyograms of the forearm extensors and flexors. The values of the signals increased depending on the muscle contraction level. Therapy for using the MCH was performed to improve the ability to produce separate contractions of two muscles. This ability was defined as the skill in controlling the motion of the MCH. The skill in each motion was evaluated by the regression coefficient, which was calculated by the least squares method. The regression coefficient was inversely proportional to the skill. A quantitative index of skill can be provided by the newly developed method, and should be useful in developing efficient therapy to improve the skill in controlling the MCH. © 2010 Wiley Periodicals, Inc. Source

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