• 전자공학회논문지 IE
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• 제43권4호
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• pp.28-36
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• 2006

본 연구에서는, 팔의 4가지 운동을 구별할 수 있는 계측 시스템과, 구별된 팔의 운동 위치를 추정할 수 있는 제어 알고리즘에 관하여 기술한다. 먼저 4가지(굽히기와 펴기, 내전과 외전) 운동을 구별하기 위해 굽혀진 정도를 측정할 수 있는 전기 저항 형태의 굽힘 센서를 사용한다. 이 센서를 왼팔의 상완 이두근과 오구완근에 1개씩 부착한다. 부착된 두 개의 센서로부터 출력되는 신호는 증폭기와 필터 등으로 구성된 계측 시스템을 통과한다. 이 시스템에서는 상완이두근에 부착된 센서 신호는 굽히기와 펴기 운동 중에서만 On/OFF 작동을 하도록 하고, 오구완근에 부착된 센서 신호는 모든 운동에 작동하도록 설계하였다. 이렇게 출력된 신호들로부터 4가지 운동은 구별하여 출력하고, 출력된 신호들로부터 팔의 운동 위치를 측정한다. 마지막으로, 제안된 알고리즘의 효용성을 입증하기 위해 RC 서보 모터와 포텐션미터로 구성된 2자유도의 인공팔을 제작하여 실험한다. 실험을 통해 인공 팔의 위치는 모터의 회전 관성, 센서의 노이즈 등으로 실제 팔의 위치와 차이가 발생하였다 이 오차를 감소하기 위해 오차값과 오차의 변화값에 근거한 퍼지 PID 제어기를 사용하였고, 이로써 오차가 5도 이내로 감소되었다.

• 기본간호학회지
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• 제8권2호
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• pp.172-188
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• 2001

Purpose: The purpose of this research was to test the effectiveness of the nursing intervention, mutual goal setting, for patients who have had a mastectomy. Special reference was given to King's goal attainment theory and a theoretical framework for establishing an effective nursing strategy to enhance patient recovery is suggested. Method: This research employed a quasi-experimental design which consisted of pretest-posttest non-equivalent control and experimental groups. Data were collected from 37 patients who had a mastectomy and were hospitalized in the Department of Surgery of Y Medical Center from January 2001 to May 2001. The experimental group received the nursing intervention, mutual goal setting four times from the day before the operation to the fifth day after the operation while the control group received only routine nursing care. As postoperative recovery indicators, ROM of arm joints, arm circumference, pain, physical symptoms, oxygen saturation stress, anxiety and body image were measured. Result: The test results are as follows : 1) there were statistically significant differences between the experimental and control groups in extension and internal rotation of the shoulder Joint and flexion of the wrist joint. 2) there was no significant difference between the two groups in arm circumference. 3) there were no significant differences between the two groups in pain, physical symptoms, or oxygen saturation. 4) there were no significant differences between the two groups in stress, anxiety, or body Image. On the basis of research results, the following are recommended : 1) The effectiveness of nursing intervention in the acute recovery period as well as long term effects need to be investigated. 2) There is a need to develop an instrument to measure perception which facilitates goal attainment in the interactive setting between patients and nurses.

• 대한정형외과스포츠의학회지
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• 제2권2호
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• pp.77-81
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• 2003

목적: 슬관절 주위 골격의 기초과학을 생체역학을 중심으로 설명하고 빈도가 높은 스포츠 손상들에 대해 기술하고자 한다. 해부 밀 운동학: 슬관절은 순수한 경첩 관절이 아니며 적합하지 않으므로 여섯 방향의 운동이 가능하다. 경골대퇴간 운동역학: 슬관절의 굴곡-신전 축은 시상면에 수직이 아닐 뿐 아니라, 관상면상 관절선과 평행하지 않으므로, 경골대퇴관절은 굴곡 시 내반과 내회전이 동반되고 신전 시에는 외반과 외회전이 동반된다. 슬개대퇴 관절: 슬개대퇴 관절 압박력은 슬관절의 굴곡 각도와 사두고근력에 비례한다 슬개골은 신전기전의 moment arm을 증가시켜 신전기전의 효율을 증대시키고 지렛대 역할을 한다. 슬개골 골절: 비전위성 골절이면서 하지 직거상 운동이 보존된 경우에 비수술적 치료의 적응증이 되며 수술적 치료 시 고정 방법의 선택은 골절 양상에 따라 결정되겠으나 어느 술식을 선택하여도 신전지대의 봉합은 필수적이며 중요하다 슬개골 불안정성: 선행 해부학적 이상을 조사해야 하며 급성 탈구에서도 골연골 골절편이 있거나 재발의 위험이 높은 운동선수에서 인대 봉합을 고려할 수 있다. 비수술적 치료 및 재활에도 불수하고 계속되는 재발성 아탈구나 탈구는 수술이 필요하다 학령기 스포츠 손상: Idiopathic Adolescent Anterior Knee Pain, Osgood-Schlatter Disease, Sinding-Larsen-Johansson Disease 등이 흔하다

• 한국운동역학회지
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• 제18권1호
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• pp.97-105
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• 2008

수영과 핀수영의 스타트 동작의 운동학적 변인들을 3차원 영상분석법으로 비교분석하였다. 수영 스타트에서는 상지는 후상방으로 몸통은 전상방으로 이동했다가 전하방으로 하강하는 양상을 보인 반면 핀수영 스타트에서는 모든 분절이 전하방으로 이동하는 양상을 보였다. 수영 스타트에서 신체중심은 멀리 전방으로 수평 이동하다가 하방으로 급격히 이동하는 반면 핀수영 스타트에서의 중심은 짧은 시간에 전하방으로 가깝게 이동하는 것으로 나타났다. 입수 시 수영의 중심은 수직 속도가 핀수영의 중심은 수평속도가 높게 나타났다. 수영과 핀수영 모두 상지의 속도가 하지보다 더 신체중심의 속도에 영향을 미치는 것으로 나타났다. 핀수영 스타트에서 고관절은 점프 전에 굴곡을 하는 반면 수영에서는 점프 후 공중에서 2번 굴곡을 하는 것으로 나타났다. 핀수영의 슬관절 굴곡 신전운동이 수영보다 더 급격한 것으로 나타났다.

• The Journal of Korean Physical Therapy
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• 제25권5호
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• pp.239-245
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• 2013

Purpose: Osteoarthritis occurs in many different joints of the body, causing pain, stiffness, and decreased function. The knee is the most frequently affected joint of the lower limb. The aim of this study was to investigate the differences of biomechanics between independent gait and anterior walker dependent gait of patients with osteoarthritis of the knee. Methods: Lower limb joint kinematics and kinetics were evaluated in 15 patients with knee osteoarthritis when walking independently and when walking with an anterior walker. Participants were evaluated in a gait laboratory, with self-selected gait speed and natural arm swing. Results: When walking with a dependent anterior walker, participants walked significantly faster (p<0.01), using a longer stride length (p<0.01), compared to independent gait. When walking with a dependent anterior walker, participants exhibited significantly greater knee flexion/extension motion (p<0.01) and lower knee flexion moment (p<0.05) compared to independent gait. When walking with a dependent anterior walker, participants showed significantly greater peak ankle motion (p<0.01), ankle dorsiflexion/plantarflexion moments (p<0.01), and ankle power generation (p<0.05) compared to independent gait. Conclusion: These biomechanical properties of gait, observed when participants walked with a dependent anterior walker, may be a compensatory response to impaired knee function to allow sufficient power generation for propulsion. Therefore, rehabilitative strategies for patients with osteoarthritis of the knee are needed in order to improve not only knee function but also hip and ankle function.

• 지역사회간호학회지
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• 제12권2호
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• pp.344-360
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• 2001

A quasi-experimental study was conducted to investigate the effects of health promotion program on health of the clients with arthritis. In this study. the health promotion program consisted of self appointment and confirmation. discussion, health education. group counsel, and exercise. And the program focused on self - help group meeting. A total of 68 subjects was randomly assigned into either the control group(n = 24) or the intervention group(n =44). The results of the study analyzed using a SPSS win, were as follows: 1) In physical function of physical health. there was a significant improvement in flexibility of the shoulder joint(hold the hand upward and downward behind the back). sit and reach, extension of the knee joint in the intervention group, compared to the control group, while no difference in flexibility of the shoulder joint(raising the arm), flexion of the knee joint, and grip strength. There was a significant improvement in physical functional disability in the intervention group, compared to the control group, but no difference in fatigue and pain. 2) The health promotion program resulted in improvement in psychosocial health(e.g. increase of self-efficacy and decreases of social functional disability) in the intervention group, compared to the control group. It was concluded that the health promotion program(weekly session for 6 weeks) employed in this study was appropriate for the clients with arthritis in primary health care center and had a positive effect on health in general.

• 제어로봇시스템학회논문지
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• 제15권2호
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• pp.176-183
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• 2009

This paper proposes command signal generating method for a wearable robot using the force as the input signal. The basic concept of this system pursues the combination of the natural and sophisticated intelligence of human with the powerful motion capability of the robot. We define a task for the command signal generation to operate with the human body simultaneously, paying attention to comfort and ease of wear. In this study, we suggest a basic exoskeleton experimental system to evaluate a HRI(Human Robot Interface), selecting interfaces of arm braces on both wrists and a weight harness on the torso to connect the robot and human. We develop the HRI to provide a command for the robot motion. It connects between the human and the robot with the multi-axis load-cell, and it measures the relative force between the human and the robot. The control system calculates the trajectory of end-effector using this force signal. In this paper, we verify the performance of proposed system through the motion of elbow E/F(Extension/Flexion), the shoulder E/F and the shoulder Ab/Ad (Abduction/Adduction).

• Clinics in Shoulder and Elbow
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• 제27권2호
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• pp.141-148
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• 2024

Background: Radial head arthroplasty allows a high degree of customizability, and implant polarity has emerged as an important variable. The purpose of this meta-analysis was to evaluate differences in functional and clinical outcomes between patients receiving monopolar and bipolar radial head prosthetic implants. Methods: A systematic review and meta-analysis were employed, and 65 articles were identified in three databases. Twelve articles contained non-English or insufficient text and were consequently excluded, and 20 others did not contain sufficient data or follow-up. The remaining 33 articles were qualitatively and quantitatively reviewed. Results: In total, 33 populations were identified, with 809 unduplicated patients: 565 with monopolar and 244 with bipolar implants. In these respective patients, the mean follow-up was 40.2 and 56.9 months. Average Mayo Elbow Performance Score were 86.7 and 87.4 (P=0.80), respectively; average Disability of the Arm, Shoulder, and Hand scores were 17.9 and 14.7 (P=0.47), and average final flexion/extension arcs were 119.4° and 118.7° (P=0.48). Revision rates were 4.07% and 6.56%, while complication rates were 19.65% and 20.08% in the respective monopolar and bipolar patients. These increased relative risks associated with bipolar implants were not significant. Conclusions: Radial head implant polarity does not appear to affect functional outcomes. While bipolar prosthetic design may increase the risks of revision and complications, the increases were not significant. Level of evidence: IV.

• 대한기계학회논문집B
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• 제41권8호
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• pp.505-510
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• 2017

본 논문에서는 다양한 견관절 장애 증상에 적용할 수 있는 보급형 상지 재활 로봇의 설계를 다룬다. 견관절의 회전에 수반되는 관절 중심의 위치변화를 추종하고, 사용자의 상지와 장치의 무게를 상쇄하는 3자유도 견관절 추종 및 중력보상 메커니즘을 구현하였다. 다양한 방향의 어깨 재활 동작을 구현할 수 있도록 구동축의 방향을 변환하는 메커니즘을 설계하여, 견관절에 대한 구동기의 상대적인 오리엔테이션을 변화시킴으로써 대표적인 5가지 견관절 동작을 수행할 수 있었다. 동시에 재활 운동 중의 견관절의 위치 변화를 추종하여 자연스러운 견관절 운동을 구현할 수 있었다. 최소의 구동기를 사용하는 보급형 로봇으로도 다양한 견관절 질환에 효과적으로 대응할 수 있음을 확인하였다.

• Archives of Plastic Surgery
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• 제45권5호
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• pp.458-465
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• 2018

Background Volar plate avulsion fracture of the proximal interphalangeal (PIP) joint is one of the most common hand injuries. In this study, we divided patients into two groups: patients with pure volar plate avulsion fracture, and patients with volar plate avulsion fracture concomitant with collateral ligament rupture. The purpose of this study was to compare long-term surgical outcomes between the two groups. As a secondary measure, the Mitek bone anchoring and polydioxanone (PDS) bone suturing techniques were compared. Methods A single-institutional retrospective review of the surgical treatment of volar plate avulsion fracture was performed. The cases were divided into those with pure volar plate avulsion fracture (group A, n=15) and those with volar plate avulsion fracture concomitant with collateral ligament rupture (group B, n=15). Both groups underwent volar plate reattachment using Mitek bone anchoring or PDS bone suturing followed by 2 weeks of immobilization in a dorsal protective splint. Results The average range of motion of the PIP joint and extension lag were significantly more favorable in group A (P<0.05). Differences in age; follow-up period; flexion function; visual analog scale scores; disabilities of the arm, shoulder, and hand scores; and the grip strength ratio between the two groups were non-significant. No significant differences were found in the surgical outcomes of Mitek bone anchoring and PDS bone suturing in group A. Conclusions Overall, the surgical outcomes of volar plate reattachment were successful irrespective of whether the collateral ligaments were torn. However, greater extension lag was observed in cases of collateral ligament injury.