응력완화용 완충재를 사용한 알루미나와 Ni-Cr-Fe 합금의 접합

이우천 대한금속재료학회(대한금속학회) 1995 대한금속·재료학회지 Vol.33 No.8

In order to prevent the cracking and fracture generated in the alumina/Inconel 600 joints after cooling, three types of insert materials with Ag-Cu-Ti filler metals was used in the joints. Effect of insert materials on the crack formation of the joints was investigated. The joints free from cracks were obtained when the laminates consisting of niobium of 250 ㎛ thick and copper of 50 ㎛ thick were used as insert materials. For the joints cooled at the rate of 4.8 ℃/min after brazing at 1113 K for 1.2 ks, the average shear strength was 75.7 MPa and the strength distribution showed the mixed mode.

종골 골절의 치료 급성 골절과 부정 유하에 대한 최신 치료 경향

이우천 대한골절학회 2007 대한골절학회지 Vol.20 No.4

문화예술 공공지원 정책에 대한 단상(斷想)

이우천 공연과이론을위한모임 2015 공연과 이론 Vol.- No.59

한의과대학 부속 한방병원의 재무비율 분석 -본원과 분원의 비교를 중심으로-

이우천,Lee, Woo-Chun 대한예방한의학회 2014 대한예방한의학회지 Vol.18 No.1

This study was conducted to analyze if there is a difference between the head hospital and branch hospital by comparing the profitability and operating expenses to patient revenue of oriental medicine hospitals affiliated with universities in order to find whether opening branch hospitals is an appropriate method to increase profitability. Profit indices used for the comparison of head hospital and branch hospital include ratio of operating profit on medical revenue, net-income on medical revenue, net profit to total assets, and operating profit to total assets; and cost indices included ratio of labor costs, material costs and administrative costs. In comparison of profit indices of head hospitals and branch hospitals, head hospitals displayed negative(-) in all four profit index averages while branch hospitals displayed positive(+), showing that branch hospitals have higher profitability. In particular, in the case of head hospitals, ratio of net profit to total assets was -13.6%, while that of branch hospitals was 12.9%, which was higher than 3.1%, the average of Korean oriental medicine hospitals in 2011. As a result of difference analysis between groups of head hospitals and branch hospitals, profit indices of ratio of operating profit on medical revenue, net-income on medical revenue, and ratio of net profit to total assets were found to vary by hospitals, but there was no statistically significant difference between head hospitals and branch hospitals(p<0.1). Only the ratio of operating profit to total assets of head hospitals and branch hospitals indicated significant difference between the two groups, showing that ratio of operating profit to total assets of branch hospitals is larger than that of head hospitals. Meanwhile, the cost indices of ratio of labor costs, material costs and administrative costs in the difference test results did not show significant difference between the head hospital and branch hospital(p<0.1). Thus, it cannot be said that a certain oriental medicine hospital's profitability is high or low depending on whether it is head hospital or a branch as profitability varies depending on the management environment of the hospital. Therefore, oriental medicine hospitals affiliated with universities would need to make efforts to increase their profitability as an individual hospital rather than focusing on whether they are head hospital or a branch.

말초 신경 병증 환자에서 발생한 종골 조면의 비외상성 견열 골절 - 1예 보고 -

이우천,남기헌 대한골절학회 2001 대한골절학회지 Vol.14 No.1

Atraumatic calcaneal fractures associated with neurological abnormalities have been reported by several authors, and most of them are associated with diabetes. Chronic alcoholism is also a cause of neurological abnormality and neuropathic arthropathies associated with chronic alcoholism were reported. However we could not find any report of atraumatic calcaneal avulsion fracture associated with chronic alcoholism. We have treated a calcaneal avulsion fracture in a chronic alcoholic patient with open reduction and internal fixation, and the result was not satisfactory. We suggest that conservative treatment is better for the atraumatic calcaneal avulsion fracture in a chronic alcoholic patient with severe osteoporosis and neurological abnormalities.

종골 골절과 연관된 족근관 증후군의 치료 결과

이우천,김유미,Lee, Woo-Chun,Kim, Yoo-Mi 대한족부족관절학회 2006 대한족부족관절학회지 Vol.10 No.1

Purpose: To review the results of surgical decompression for tarsal tunnel syndrome associated with calcaneus fractures. Materials and Methods: Six tarsal tunnel syndromes in five patients were surgically decompressed at our hospital with followed up of average 26.0 months (range, $12{\sim}36$ months). All patients were male and average age at surgery was 50.0 years (range, $33{\sim}69$years). All five cases developed after calcaneus fractures including one bilateral case. Clinical results were assessed according to the criteria of Pfeiffer and Cracchiolo. Results: The result was good in three cases, fair in one case and poor in two cases. Four cases in four patients were satisfied with the result of treatment. Conclusion: Clinical results of surgical treatment for tarsal tunnel syndrome associated with calcaneus fracture of the foot or ankle was improved and maintained in four of six cases.

무지 외반증 환자에서 전족부의 방사선상의 지표들과 족저 압력의 관계

이우천,권강진,정지현,고한석,Lee, Woo-Chun,Kwon, Kang-Jin,Chung, Ji-Hyun,Ko, Han-Suk 대한족부족관절학회 2003 대한족부족관절학회지 Vol.7 No.1

Purpose: To investigate the relationship between radiographic parameters of the forefoot and plantar pressure in patients with hallux valgus. Materials and Methods: Plantar pressures of 21 patients with hallux valgus were examined with EMED-ST system. The data were compared with the parameters on the simple weightbearing dorsoplantar radiographs of the feet. The radiographic parameters that were measured were hallux valgus angle, 1-2 intermetatarsal angle, relative lengths of the metatarsals which were measured with the methods described by Maestro et al. and Okuda et al. Results: Statistically significant correlation was found between peak pressures under 2, 3 metatarsal heads and the relative lengths of 2, 3 metatarsals which were measured with the method described by Maestro et al. However they could explain only 13% of the pressures under the 2, 3 metatarsal heads by multivariate analysis. Conclusion: These results suggest that we cannot predict the plantar pressures under the foot with the parameters on the simple weightbearing dorsoplantar radiographs of the feet.

족부 및 족관절 부위에서 비복 신경의 해부학 및 수술시의 의미

이우천,박현수,한영길,장병춘,임장운,라종득,Lee, Woo-Chun,Park, Hyun-Soo,Han, Young-Kil,Chang, Byeong-Chun,Rim, Jang-Woon,Rha, Jong-Deuk 대한족부족관절학회 1998 대한족부족관절학회지 Vol.2 No.2

The course of the sural nerve in the calf has been well documented, but there is a general lack of information concerning the distal course of the nerve. The purpose of this study was to describe the distal course of the sural nerve and its surgical implications. Seven fresh amputated specimens were dissected to show the anatomy of the sural nerve in the foot and ankle. At the level of about 10cm proximal to the plantar surface, the sural nerve coursed anteriorly and inferiorly away from the Achilles tendon. 2 to 4 lateral calcaneal branches arose. The first branch of the lateral calcaneal branches coursed along the lateral border of the Achilles tendon, and it arose at 8cm proximal to the plantar surface in 2 specimens, 12cm proximal to the plantar surface in 4 specimens, and at 12cm proximal to the plantar surface in one specimen. The main nerve trunk continued distally plantar to the peroneal tendons and divided into two terminal branches and crossed peroneus longus tendon at the level of the inferior border of the calcaneo-cuboid joint, at about 3cm(range, $2.5\sim3.0$)cm from the plantar surface. In conclusion, a longitudinal incision lateral to the Achilles tendon would cross the path of the sural nerve at about 10cm proximal to the plantar surface. When the first branch of them arise more than 10cm above the plantar surface, a logitudinal incision lateral to the Achilles tendon may be made without damage. The other lateral calcaneal branches will be cut when we make transverse incision paralled to the plantar surface. The terminal branch also may be in danger by the same transverse incision.

거골하 관절 운동의 측정

이우천,박현수,한영길,조정진,장병춘,라종득 대한스포츠의학회 1998 대한스포츠의학회지 Vol.16 No.1

Subtalar motion occurs in all three planes and it is impossible to measure it accurately by clinical examination. There are many studies with so different normal ranges that we can not believe it represents the motion of the same joint. We presumed that the motion measured when the foot moves freely in all three planes will be different from that measured when the foot movement is restricted in one or two planes. We measured inversion and eversion of 80 feet in 40 young healthy adults. The range of inversion and eversion when the foot moves freely in three planes was 28.9±6.2˚, 9.6±3.3˚, when the sagittal plane movement was restricted, those were 10.4±4.9˚, 8±3.4˚ respectively, when the sagittal and transverse plane movement was restricted, those were 9.7±3.6˚, 7.2±3.2˚ respectively. The above result shows that we can get a far greater range of motion when the foot moves freely in three planes. It seems to be more reasonable to measure the range of motion of the subtalar joint while the foot moves in all planes.

대학(부속) 한방병원의 재무비율과 경영성과

이우천 한국벤처창업학회 2012 한국벤처창업학회 학술대회 Vol.2012 No.4