• Journal of Korean Orthopaedic Sports Medicine
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• v.1 no.1
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• pp.75-78
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• 2002

Avulsion of the hamstring tendon from the ischial tuberosity is common in many sports, especially with younger athletes. The injury results from a sudden forceful flexion of the hip joint when the knee is extended and the hamstring muscles powerfully contracted. Early diagnosis and surgical repair with reattachment of avulsed muscles to the ischial tuberosity restore function and correct deformity. But, a delay in the diagnosis and treatment leads to a poor result functionally and clinically. Complication, such as heterotopic ossification and failure of the fixation, etc., were reported following a surgical procedure for this injury. However, sciatic nerve injury has not been reported in the literature. We report our experience of a sciatic nerve palsy after surgery that was performed three months after that the initial injury.

• Journal of Korean Orthopaedic Sports Medicine
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• v.10 no.2
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• pp.129-132
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• 2011

A complete rupture of hamstring tendon originated from ischial tuberosity is a uncommon sports injury in adults. We present successful outcome obtained by attachment on ischial tuberosity using suture anchor in relatively rare case of the proximal rupture of the medial hamstring tendon sustained during landing with the review of literatures.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1995.04a
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• pp.529-533
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• 1995

안장은 인체하중이 집중되고, 자전거의 충격과 진동이 직접 전달되는 부위로서 주행 안락도를 높이고 buttock의 discomfort를 감소시킬 수 있도록 설계되어야 한다. 본 연구의 목적은 인체곡면을 본뜬 안장형상 설계를 통하여 buttock의 국부적 discomfort를 감소시키고자 하는 것이다. 인간의 앉은자세에 대한 해부학적 고찰을 통해 좌골결절(Ischial Tuberosity)과 치골결합면(Symphyseal Surface)이 안장과 직접 맞닿는 면으로 파악되었으며, 이들 부위에 대한 집중적 개선이 이루어져야 할 것으로 제안되었다. 문헌조사를 통해 의자설계시 고려해야 할 인체치수 및 지침을 파악하였으며, 안장과 의자의 기능비교를 통해 이를 선별적으로 적용하였다. 인체곡면 측정을 위해 Rod Matrix(3cm 간격, 13*20)방법을 이용하여 10명의 buttock contour를 측정하였으며, 측정된 자료를 분석하여 안장의 곡면형상을 결정하였다. General Comfort Rating, Body Part Discomfort 등의 주관적 안락도 평가방법을 통하여 기존 자전거 안장과 본 연구를 통해 개발된 안장을 비교 평가한 결과, 전반적인 안락도의 향상과 좌골결절 및 치골 결합부의 discomfort 감소효과를 가져온 것으로 파악되었다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.645-646
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• 2006

Pressure-induced decubitus is a serious disease among the elderly people. Interface pressure occluding vascular perfusion is known to be a cause of decubitus. Therefore, it is essential to quantify the relationship between vascular perfusion and interface pressure among the elderly people. Nine elderly normal people ($57.8{\pm}5.6\;years,\;63.3{\pm}7.0kg,\;1.68{\pm}0.05m$) were participated. Pressure was applied on the ischial tuberosity in the sitting posture from 0mmHg to 135mmHg as capillary vascular perfusion was recorded. The average interface pressure to occlude vascular perfusion under the ischial tuberosity is 120mmHg. Vascular perfusion values at the capillary occlusion is often lower than 60% of the vascular perfusion at 15mmHg. Higher sampling number is required to have more accurate results.

• The Journal of the Korean bone and joint tumor society
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• v.19 no.2
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• pp.83-86
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• 2013

Ganglion cysts that occurred within sheaths of peripheral nerves have been documented in literatures, but it is relatively rare condition. The peroneal nerve is the most common site of involvement. Other reported sites of involvement are the radial, ulnar, median, sciatic, tibial and posterior interosseous nerves. We report a case of the intraneual ganglion cyst within peroneal nerve and another case of the intraneural ganglion cyst within a medial plantar nerve that were successfully excised without neurologic complication.

• Journal of the Korean Society for Precision Engineering
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• v.24 no.7 s.196
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• pp.126-132
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• 2007

Pressure-induced decubitus is a serious disease among the elderly people. Interface pressure occluding vascular perfusion is known to be a cause of decubitus. Therefore, it is essential to quantify the relationship between vascular perfusion and interface pressure among the elderly people to understand more about decubitus. Nine healthy elderly people (57.8$\pm$ 5.6 years, 63.3$\pm$ 7.0kg, 1.68$\pm$ 0.05m) were participated. Three healthy young people (31.7$\pm$ 3.2 years, 74.7$\pm$ 8.4kg, 1.75$\pm$ 0.04m) were also examined to be compared with the elderly group. Capillary vascular perfusion on the ischial tuberosity was recorded in the sitting posture as pressures were applied from 15mmHg to 135mmHg. The average interface pressure to occlude vascular perfusion (the average occlusion pressure) under the ischial tuberosity was 115.7mmHg in the elderly group. This value was not significantly different from the average occlusion pressure of the young group. Obesity effect on the occlusion pressure was investigated among the elderly group. The result was not significantly different between the obesity and the normal group in this study. This is a preliminary study to unveil the complicated cause of pressure-induced decubitus associated with occlusion of vascular perfusion. More subjects are required for the future study.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2002.05a
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• pp.323-326
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• 2002

본 연구는 새로 개발된 에어쿠션의자의 인체 적합성 검증에 관한 실험으로 기존 에어쿠션의자와 스펀지 매트의자를 새로 개발된 의자와 비교 평가 하였다. 본 연구를 위해 설문지를 통한 사용자의 감성 및 사용성을 측정하였고 객관적 검증에 필요한 체압분포측정을 하였다. 실험의 결과 사용성 평가에서 대부분의 피험자들이 신형 의자가 보다 편안하고 안락하다고 응답하였으며, 각 의자를 비교하는 전체 14항목의 설문 중 11개 항목이 의자A에서 중요도 순위가 좋게 나타났다. 체압분포에서도 좌판의 경우 신형 에어쿠션의자의 체압의 평균값이 적게 나오면서 고르게 분포하였고, 좌골결절을 중심으로 좌, 우 대칭이 되게 나왔다. 또한 등판부위에서도 등판의 수직선을 중심으로 체압분포가 좌, 우 대칭이 되게 나왔다.