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Hiroki Aoyama,Kazuo Yonenobu,Katsushi Ogawa,Seonghee Jeong 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
We aim to develop a robotic assistive walker that assists the users pelvis with the robotic arms. It would help the possibility that the patients or frail elderly can practice walking by themselves safely and efficiently. We measured the force and moment produced by a physiotherapist (PT) assisting the subjects gait in a wheeled upright walker under the condition of the 70% partial weight-bearing on their right foot. We verified the effects of the assistance by the PT on the walker gait, associating it with the results of the assistive patterns. Our results showed a noticeable force to assist in loading the right foot in the early stance phase and force to restrain the subjects from loading on the right foot in the midstance phase. In swing phases, we could find forces and moments to assist in swinging the lower extremities forward on both sides. We used the load on the right foot and the maximum pelvic rotation angle to verify the effect of the assistance by the PT, resulting in that we could obtain the gait characteristics with the assistance during the wheeled upright walker gait. Our outcomes can be significant for developing the robotic assistive walker.
Hiroki Aoyama,Hirofumi Hori,Kazuo Yonenobu,Kenji Uegami,Katsushi Ogawa,Seonghee Jeong 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
The purpose of this study is to represent the effect on the movement of the pelvis by the posture and the load on upper extremities in gait with the rolling stand-up walker. We measured stride length, the maximum vertical ground reaction force per body weight, the excursion of angles of trunk and pelvis in the movement of obliquity, tilt, and rotation, and the amplitude of center of mass in the vertical and lateral direction while five healthy subjects had performed the gait with a rolling stand-up walker. Our first primary outcome is that the movement of the trunk tilt and rotation, and the pelvic obliquity and rotation had been observed during the gait with the rolling stand-up walker. The second outcome is that 40 % of the load on upper extremities restricted the movement of the trunk obliquity and the pelvic tilt. The third outcome is that at 20 % of the load on upper extremities, the displacement of the pelvis in lateral and vertical direction had been limited. These suggestions could be a piece of crucial evidence to design the program in the robot-assisted walker.
Proposal of Rolling Type Training Walker with Gait Handling Device
Kenji Uegami,Hiroki Aoyama,Katsushi Ogawa,Kazuo Yonenobu,Seonghee Jeong 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
In a recovery rehabilitation unit, a gait training is carried out for a patient with a lower-limb disease. However, sufficient rehabilitation training has not been provided for patients who need effective gait training due to a lack of PT and short training time. To cope with the issues, in this paper, a rolling standing-up training walker aiming to ”consistent gait rehabilitation” is proposed. The preliminary experiment to investigate the influence of the upper extremities load on the pelvic motion was conducted. The results showed that the pelvic movement was not significantly affected by the load of the upper extremities. This indicates that a gait handling with an assistive device is applicable. A gait assist force by a PT was measured to obtain the information in designing the gait handling device. Finally, the prototype of the training walker with the gait handling device and the upper extremities load. measurement device was proposed. The stiffness control without force sensors was implemented to the handling device and confirmed its effectiveness through experiments.
Inspiratory Muscle Training Effects on Respiratory Function and Coughing Ability in Men With Obesity
Yoshihiro Yamashina,Hiroki Aoyama,Tomoko Hirayama,Emiko Morita,Nami Sakagami,Hiroto Honda,Kazuyuki Tabira 물리치료재활과학회 2023 Physical therapy rehabilitation science Vol.12 No.4
Objective: Cough is a biological defense mechanism which produces sputum. Difficulties with expelling sputum can occur during decreased coughing ability caused by obesity, which increases the risk of pulmonary complications.We investigated the influence of an 8-week inspiratory muscle training (IMT) program on respiratory function and respiratory muscle strength in the sitting and supine positions of people with obesity. Design: A randomized controlled trial Methods: The participants were Twenty-one men with a body mass index (BMI) ≥ 30 kg/m2 or more. They were randomized into a control group (CG: n=10) and an IMT group (IMTG: n=11). The threshold IMT was used at a load of 30% of the maximum inspiratory oral pressure in the IMTG; the minimum load of the threshold IMT was used in the CG. Two sets of 15 min a day were performed four times a week for 8 weeks. Respiratory function, respiratory muscle strength, and coughing ability were measured in the sitting and supine positions. Results: Compared to baseline values, vital capacity in the supine position and inspiratory and expiratory muscle strength were significantly increased after 8 weeks in the IMTG, but not in theCG.Coughing ability did not differ significantly between the groups. Conclusion: Eight weeks of IMT enhanced respiratory muscle strength in men with obesity and improved vital capacity in the supine position;however, itdid not improve coughing ability.
Accelerated inflammation in peripheral artery disease patients with periodontitis
Keitetsu Kure,Hiroki Sato,Norio Aoyama,Yuichi Izumi 대한치주과학회 2018 Journal of Periodontal & Implant Science Vol.48 No.6
Purpose: Peripheral artery disease (PAD) is a form of arteriosclerosis that occurs in the extremities and involves ischemia. Previous studies have reported that patients with periodontitis are at high risk for PAD. However, the relationship between these 2 diseases has not yet been fully elucidated. In this cross-sectional study, we investigated this relationship by comparing patients with PAD to those with arrhythmia (ARR) as a control group. Methods: A large-scale survey was conducted of patients with cardiovascular disease who visited Tokyo Medical and Dental University Hospital. We investigated their oral condition and dental clinical measurements, including probing pocket depth, bleeding on probing, clinical attachment level, and number of missing teeth; we also collected salivary and subgingival plaque samples and peripheral blood samples. All patients with PAD were extracted from the whole population (n=25), and a matching number of patients with ARR were extracted (n=25). Simultaneously, ARR patients were matched to PAD patients in terms of age, gender, prevalence of diabetes, hypertension, dyslipidemia, obesity, and the smoking rate (n=25 in both groups). Real-time polymerase chain reaction was performed to measure the bacterial counts, while the enzyme-linked immunosorbent assay method was used to measure anti-bacterial antibody titers and proinflammatory cytokine levels in serum. Results: PAD patients had more missing teeth (18.4±2.0) and higher serum levels of C-reactive protein (1.57±0.85 mg/dL) and tumor necrosis factor-alpha (70.3±5.7 pg/mL) than ARR patients (12.0±1.7, 0.38±0.21 mg/dL, and 39.3±4.5 pg/mL, respectively). Meanwhile, no statistically significant differences were found in other dental clinical measurements, bacterial antibody titers, or bacterial counts between the 2 groups. Conclusions: Our findings suggested that PAD patients had poorer oral and periodontal state with enhanced systemic inflammation.
Accelerated inflammation in peripheral artery disease patients with periodontitis
Kure, Keitetsu,Sato, Hiroki,Aoyama, Norio,Izumi, Yuichi Korean Academy of Periodontology 2018 Journal of Periodontal & Implant Science Vol.48 No.6
Purpose: Peripheral artery disease (PAD) is a form of arteriosclerosis that occurs in the extremities and involves ischemia. Previous studies have reported that patients with periodontitis are at high risk for PAD. However, the relationship between these 2 diseases has not yet been fully elucidated. In this cross-sectional study, we investigated this relationship by comparing patients with PAD to those with arrhythmia (ARR) as a control group. Methods: A large-scale survey was conducted of patients with cardiovascular disease who visited Tokyo Medical and Dental University Hospital. We investigated their oral condition and dental clinical measurements, including probing pocket depth, bleeding on probing, clinical attachment level, and number of missing teeth; we also collected salivary and subgingival plaque samples and peripheral blood samples. All patients with PAD were extracted from the whole population (n=25), and a matching number of patients with ARR were extracted (n=25). Simultaneously, ARR patients were matched to PAD patients in terms of age, gender, prevalence of diabetes, hypertension, dyslipidemia, obesity, and the smoking rate (n=25 in both groups). Real-time polymerase chain reaction was performed to measure the bacterial counts, while the enzyme-linked immunosorbent assay method was used to measure anti-bacterial antibody titers and proinflammatory cytokine levels in serum. Results: PAD patients had more missing teeth ($18.4{\pm}2.0$) and higher serum levels of C-reactive protein ($1.57{\pm}0.85mg/dL$) and tumor necrosis factor-alpha ($70.3{\pm}5.7pg/mL$) than ARR patients ($12.0{\pm}1.7$, $0.38{\pm}0.21mg/dL$, and $39.3{\pm}4.5pg/mL$, respectively). Meanwhile, no statistically significant differences were found in other dental clinical measurements, bacterial antibody titers, or bacterial counts between the 2 groups. Conclusions: Our findings suggested that PAD patients had poorer oral and periodontal state with enhanced systemic inflammation.
Proposal of Layer-Based IoT System Construction Method and Implementation to Rolling Stand-up Walker
Katsushi Ogawa,Kenji Uegami,Hiroki Aoyama,Kazuo Yonenobu,Seonghee Jeong 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
It is a problem that the elderly to spoil gait function affects the activities of daily living (ADL), and deteriorates the quality of life (QoL). In order to enhance the effect of rehabilitation in the gait function, it is desirable to increase the amount of training. In this research, we develop a measurement system for a gait training device that enables effective rehabilitation utilizing IoT and measurement technology proactively, and aims to realize ”constant rehabilitation” that consider daily lives except training time as rehabilitation. We propose an IoT measurement system model that classifies each function of IoT system in a hierarchical structure to promote system development more efficiently. Based on this model, we modularized a device for measuring the upper limb load, acceleration and gait distance, developed a device for presenting to the user via the Web, and implemented it on a commercial rolling stand-up walker and gait training device. We confirmed that we can measure normally using each mounted module.