• 한국운동역학회지
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• 제19권1호
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• pp.99-106
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• 2009

연구의 목적은 여성 호르몬 변화가 무릎의 느슨함에 영향을 미치는지에 관한 연구가 실시되었다. 23명의 여성피험자들이 본 실험에 참여하였다. 각 피험자의 호르몬 주기 중에 세 차례에 걸쳐 에스트라디올과 프로제스트론을 혈액들 통해서 산출되었다. 첫 번째 측정은 호르몬주기의 초기 중 3일과 7일 사이에, 두 번째 측정은 배란측정기를 통해서 에스트로겐의 최고치 측정 후 24시간에서 48시간 후인 배란기에 실시되었다. 세 번째 측정은 28일의 평균 호르몬주기를 기준으로 두 번째 측정 후 약 7일이 지난 후에 실시되었다. 무릎 관절의 느슨함 정도가 측정기기(KT-2000)를 통해서 호르몬 수치와 함께 동시에 측정되었다. 다중회귀분석을 통해서 호르몬의 수치와 무릎의 느슨함 정도가 각 시기별로 비교되었다. 호르몬의 수치들은 세 차례의 시기 간에 차이가 있었다. 무릎의 느슨함은 각각 호르몬 배란기 동안에 증가를 나타내었다. 다중 회귀방정식을 통해서 20lb좌 30lb의 부하 수준에서 77.9%에서 80.9%4의 예측수준을 나타내었고 두 호르몬 간에 관계가 관절의 느슨함에 상호 상쇄적인 영향을 미치는 것으로 나타났다. 따라서 호르몬의 수치가 무릎의 느슨함을 적절하게 예측할 수 있었다. 이러한 결과를 통해서 개인의 호르몬 수치의 프로파일을 통해서 관절의 느슨함과 같은 관절의 특성을 이해하고 이를 통해서 스포츠 상황에서의 관절상해에 관한 유용한 정보를 제공할 수 있겠다.

• 대한족부족관절학회지
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• 제17권3호
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• pp.196-202
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• 2013

Purpose: To report the clinical results from using absorbable suture materials instead of nonabsorbable materials which have been used more commonly to repair Achilles tendon. Materials and Methods: We retrospectively reviewed 21 cases of acute Achilles tendon rupture, treated surgically from 2004 to 2011. Mean follow-up period is 6 months. We repaired Achilles tendon using size 1 Vicryl (Polyglactin 910, Ethicon) for core suture and size 3-0 Vicryl for epitendinous suture. At three months after surgery, we evaluated clinical results with single heel raise height by centimeters, differences of calf circumference and passive range of motion of ankle joint, compared to contralateral side. Also we recorded clinical results with subjective satisfaction grades. Results: At three months after surgery, 20 of 21 patients were able to perform single heel raise over 5 cm in height. Calf circumference differences were less than 1 cm in 12 cases, between 1 cm to 3 cm in 5 cases, more than 3 cm in 4 cases. There was no difference in range of passive motion in 19 cases. All patients satisfied with daily activity except 2 cases with mild discomfort. There was no complication such as rerupture, elongation or infection. Conclusion: We experienced excellent clinical results from repairing Achilles tendon with using absorbable suture materials in terms of functional outcomes and patient's satisfaction without any complication. So we may consider using absorbable suture materials instead of nonabsorbable materials to repair Achilles tendon.

• 제어로봇시스템학회논문지
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• 제21권5호
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• pp.421-426
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• 2015

Need to develop human body's posture supervised robots, gave the push to researchers to think over dexterous design of exoskeleton robots. It requires to develop quantitative techniques to assess human motor function and generate the command to assist in compliance with complex human motion. Upper limb rehabilitation robots, are one of those robots. These robots are used for the rehabilitation of patients having movement disorder due to spinal or brain injuries. One aspect that must be fulfilled by these robots, is to cope with uncertainties due to different patients, without significantly degrading the performance. In this paper, we propose chattering free sliding mode control technique for this purpose. This control technique is not only able to handle matched uncertainties due to different patients but also for unmatched as well. Using this technique, patients feel active assistance as they deviate from the desired trajectory. Proposed methodology is implemented on seven degrees of freedom (DOF) upper limb rehabilitation robot. In this robot, shoulder and elbow joints are powered by electric motors while rest of the joints are kept passive. Due to these active joints, robot is able to move in sagittal plane only while abduction and adduction motion in shoulder joint is kept passive. Exoskeleton performance is evaluated experimentally by a neurologically intact subjects while varying the mass properties. Results show effectiveness of proposed control methodology for the given scenario even having 20 % uncertain parameters in system modeling.

• 재활복지공학회논문지
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• 제9권4호
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• pp.319-329
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• 2015

본 논문에서는 다자유도 동적 하네스 시스템 개발을 위해 일상동작에서와 트레드밀 보행 시 하네스 체중 지지에 따른 하지 동작 패턴에 관한 연구를 수행하였다. 건강한 성인 남성 5명을 대상으로 일상생활 동작과 하네스 체중지지에 따른 좌, 우 대퇴직근, 외측광근, 전경골근, 외측 비복근과 족압을 측정하였다. 실험 결과, 일상생활 동작 수행 시 EMG는 각 구분 동작들에 따른 특이적인 근육 활성을 나타내었다. 슬관절의 굴곡과 신전을 요하는 앉기, 서기, 계단 오르기, 계단 내리기 동작에서의 외측광근의 활성이 두드러졌다. 족압 분포의 경우 일상생활 동작 중 중력방향으로 내려오는 계단 내려오기 동작에서 가장 큰 족압 분포 값을 보였다. 수동형 하네스 체중 지지율이 증가에 따라 근육 활성도와 족압 분포 값은 감소하는 경향을 보였다. 이러한 결과를 토대로 체중지지를 통한 보행 훈련이 체중지지율 변화에 따라 다양한 환자 군에 적용 시킬 수 있을 것이다 판단된다.

• 한국전문물리치료학회지
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• 제24권2호
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• pp.19-26
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• 2017

Background: To improve lumbo-pelvic stability, passive support devices (i.e., a pelvic belt) are recommended clinically. Nevertheless, to understand the influence of passive support on lumbo-pelvic stability, it is necessary to examine the influence of a pelvic belt on the abdominal and hip abductor muscles. Objects: To examine the effects of a pelvic belt on the forces of the hip adductor and abductor muscles and activity of the abdominal muscles during isometric hip adduction and abduction. Methods: This study recruited 14 healthy men. All subjects performed isometric hip adduction and abduction with and without a pelvic belt in a neutral hip position. Load cells, wrapped with a non-elastic belt, were placed above the medial and lateral malleoli of the dominant leg to measure the muscle forces of the hip adductors and abductors, respectively. The forces of the hip adductors and abductors were measured using a load cell during isometric hip adduction and abduction, while the electromyographic activities of the bilateral rectus abdominis, internal oblique, and external oblique muscles were measured. Results: The forces generated by the hip adductors and abductors were significantly greater with the pelvic belt than without (p<.05). No significant differences in abdominal muscle activities between the two conditions were found (p>.05). Conclusion: These findings suggest that use of a pelvic belt could lead to effective strengthening exercise of hip muscles in individuals with sacroiliac joint pain.

• 대한정형도수물리치료학회지
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• 제28권2호
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• pp.57-65
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• 2022

Background: This study examined the effects of adding fibular repositioning taping (FRT) to ankle mobilization with movement taping (AMT) on the ankle range of motion (ROM), balance, and gait performance in patients with chronic stroke with limited ankle dorsiflexion. Methods: The participants were randomized into the control (n=15) and AMT+FRT groups (n=15). The control groups applied only non-elastic taping on the affected ankle, and the AMT+FRT groups also applied non-elastic taping to the inferior tibiofibular joint. Both groups performed treadmill walking for 10 minutes. The ankle dorsiflexion passive ROM, balance, gait velocity, and cadence were measured before and after the intervention. Results: Both groups showed a significant difference after the intervention in the dorsiflexion ROM (p<.01), balance (p<.01), and gait performance (p<.01). On the other hand, no significant difference was observed between the two groups (p>.05). Conclusion: AMT improved ankle dorsiflexion passive ROM, balance, gait velocity, and cadence in patients with chronic stroke, but there was no difference between the two groups. Therefore, the addition of FRT to AMT does not influence the ankle dorsiflexion ROM, balance, and gait performance in patients with chronic stroke.

• 근관절건강학회지
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• 제3권1호
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• pp.50-62
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• 1996

The purpose of this study was to identify and construct a substantive theory about the experience of fatigue among the female elderly with osteoarthritis. The interviewees were 6 female elderly with osteoarthritis. Of them 3 were admitted General hospital, the remaining 3 didn't admitted hospital. The data were collected through in-depth interviews by the investigators from May 20th, 1995 to June 19th, 1995. The collected data were coded into concepts and categories according to Strauss & Corbin's grounded method. The data thus collected were analyzed immediatly after interviews and fed into next round of interviews until the data collection reaches the saturation point where no additional concepts emerge. The 35 concepts were from analyzing the grounded data. The results of this study were as follows : 'change of the health condition','change of the life pattern', 'physiologic change', 'change of the coping pattern', 'performance of homework', 'activity daily living', 'tireness', 'ache', 'change of general apperance', 'sleep disturbance', 'powerlessness'. 'Physiologic unbalance', 'change of the family dynamics', 'physical imbalance', 'loss of the control', aviodance', 'conversion', 'leaving', 'indifference', 'hesitation', 'the pursue of information and trial', 'the western therapy', 'heat therapy', 'the oriental therapy','exercise', 'weight control', 'support', 'solution', 'being as before', 'adding more'. Six categories emerged from the analysis of ground data. They were as follows : 'stimuli', 'fatigue', 'passive coping', 'active coping', 'disolution', 'remains'. 13 hypothesis were derived from the integration of categories as follows : 1. The stronger the stimulus as perceived by the subjects, the more the fatigue will exrerience. 2. The more severe the fatigue, the more severe the tireness. 3. The more severe the fatigue, the more the hardness. 4. The more severe the fatigue, the more the variability of appear will experience. 5. The more severe the fatigue, the more the pain will experience. 6. The more severe the fatigue, the more the insomnia will experience. 7. The more severe the fatigue, the more the powerless will experience. 8 The more severe the fatigue, the more the psychological unbalance will experience. 9. The more severe the fatigue, the more variability of the family dynamics will experience. 10. The more severe the fatigue, the more the physical unbalance will experience. 11. The more severe the fatigue, the more loss of control will experience. 12. The subjects who experienced the fatigue will be to show passive coping and active coping mechanism.

• Journal of Acupuncture Research
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• 제28권4호
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• pp.49-55
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• 2011

Objectives : The purpose of this study was 1) to investigate the possibility of taking blood stasis pattern as a clinical parameter of frozen shoulder, using blood stasis pattern questionnaire (BSPQ) to frozen shoulder group comparing with normal group, and 2) to find out the relationship of the severity of main frozen shoulder symptoms (pain and limited range of motion of shoulder) and the level of blood stasis pattern through BSPQ analysis. Methods : During the period of January 2010 to July 2010, fifty five frozen shoulder patients who visited outpatient clinic of department of acupuncture and moxibustion in East-West Neo Medical Center, Kyung Hee University and fifty five normal people without shoulder pain nor limited ROM in shoulder joint were evaluated through BSPQ, and to the frozen shoulder group, also evaluated three different visual analogue scales (VAS) of pain (pain on average, pain at night, and pain on motion) and active / passive range of motion (ROM) of shoulder joint. Results : Mean blood stasis pattern score of frozen shoulder patients group was significantly higher than the score of normal group (patients vs normal group : $4.85{\pm}1.68$ vs $3.49{\pm}1.54$). Three different types of pain VAS (on average, at night and on motion) showed low to very low positive correlation with BSPQ scores when analyzed with Pearson's correlation coefficient. ROM levels in shoulder joint were not significantly related to BSPQ scores, though active external rotation range showed low positive correlation with BSPQ scores. Conclusions : Patients with frozen shoulder showed higher blood stasis pattern score in BSPQ but the level of blood stasis pattern is not significantly related to the severity of pain or limitation of ROM in shoulder joint.

• Corrosion Science and Technology
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• 제17권2호
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• pp.68-73
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• 2018

Substitution of hip and knee joints by CoCr alloys is in great demand due to their high wear resistance and good biocompatibility. Understanding of tribocorrosion in joint replacements requires study of variables such as coefficient of friction and the choice of a proper corrosive medium in wear-corrosion tests carried out in the lab. The objective of this study was to characterize tribocorrosion behaviour of CoCr alloy with low (LCCoCr) and high carbon (HCCoCr) contents in several corrosive media: NaCl, Phosphate Buffer Solution (PBS), and PBS with hyaluronic acid (PBS-HA). Tribocorrosion tests were carried out on a pin-on-disk tribometer with an integrated electrochemical cell. A normal load of 5N was applied on the alumina ball counterpart at a rotation rate of 120 rpm. Coefficient of friction (COF) was measured and tribocorrosion behaviour was characterized by in situ application of electrochemical techniques. HCCoCr alloy immersed in PBS-HA showed the best tribocorrosion behaviour with the lowest COF. In this case, in situ measurement of corrosion potential and the impedance data under wear corrosion process showed an active state while passive film was continuously destroyed without possibility of regeneration.

• Archives of Plastic Surgery
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• 제37권3호
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• pp.304-308
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• 2010

Purpose: Many causes for triggering or locking of the fingers have been discussed in other literatures. The most common one is known stenosing tenosynovitis, which causes, a mismatch between the volume of the flexor tendon sheath and its contents. However, repeated trauma to the hand is uncommon cause of trigger finger. Therefore, we present a case of a rare condition of stenosing tenosynovitis which developed from a repeated relatively weak superficial flexor tendon injury. Methods: The patient was a 62-year-old woman who showed a painless, fixed and round mass on her right hand with no particular cause. Active and passive range of motion of the metacarpophalangeal joint of long finger was limited in flexion and extension. Ultrasonographic finding showed injured flexor digitorum superficialis tendon had fibrillar architecture with swelling between hyperechoic synovial membrane and hypoechoic surrounding area. Surgical exploration revealed that a bunched portion of the flexor digitorum superficialis and A1 pulley cause triggering during operation after adhesiolysis of scar tissue. Results: After releasing the A1 pulley, the range of motion of the metacarpophalangeal joint of long finger showed no limitation and histological examination of the subcutaneous tissue revealed fibrous fatty degeneration. In this case, releasing the A1 pulley with adhesiolysis of the subcutaneous scar tissue was successful and we obtained good functional outcome. Conclusion: We examined a patient in whom a repetitive impact forces to the palm caused longitudinal tear of the flexor tendon, leading to trigger finger. We experienced a rare case of stenosing tenosynovitis and trigger finger caused after close injury to flexor digitorum superficialis and its degenerative changes that caused mass like effect. To the best of authors' knowledge, our case of close injury to the flexor digitorum superficialis and unique morphologic change before rupture of tendon is rarely to be reported.