砂質土에서 鋼말뚝의 마찰지지력에 관한 연구

황신일,민덕기,조상덕,김수일 연세대학교 산업기술연구소 1981 논문집 Vol.13 No.2

The friction resistance of a pile is the major contribution to the bearing capacity of friction piles. In this paper, an empirical equation for the friction capacity of steelpipe piles in sand is proposed through the laboratory pullout test. Pullout tests are carried out for the piles with length to diameter ratios of 4 to 10. The density levels of sand selected in the test are very loose, loose, medium and dense. The experimental analysis shows that the friction capacity is linearly increased with the internal friction angle of sand, and it also shows that the friction capacity is linearly increased with the length to diameter ratio of piles. Also, an important parameter to determine the friction capacity of a pile, the lateral coefficient of earth pressure, shows good correlations when compared with other pile equations.

족관절 골절의 분류 : 분류체계간의 비교 Comparison Among the Sysytems

황득수,진영안 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2

The main purpose of a classification system is to provide a mental picture of the injury and also information as to treatment a prognosis. At present, Lauge-Hansen classfication has improved the results of conservative treatment, and Danis-Weber classification which was taken by the AO(ASIF) group was designed for application to operative treatment. But, both system have dificiencies, Recently, the proposed classification system by M. Tile which was based on the ankle stability was interesting. So, compared among the system for identification that these systems are synonymous or if not, one system has a distinct advantage over the other. Total 135 patients, 135 cases have been reviewed at CNUH from January, 1983 to December, 1988. The results were as follows: 1. We considered that it was very difficult to classify the ankle fractures by Lauge-Hansen system because of complexity and variable fracture patterns. But, we have been classified the fractures abut 98.5% by simplification of medial malleolar frecture patterns. 2. Danis-Weber classification was simple and easily applicated, but it was not helpful for decision of the amount of injury, treatment and prognosis. 3. The proposed M. Tile classification added to a aspect of the stability, so it was helpful for descision of the treatment methods. Also, this system classified the isolate medial malleolar freature that was not by Danis-Weber classification. 4. From the above results, we consider that by Lauge-Hansen classification, can be identify the occult ligament injuries, and by M. Tile classification, deside the treatment methods.

퇴행성 슬관절염에 있어서 Arumalon의 효과에 대한 임상적 고찰

황득수,진영안,최규종 최신의학사 1991 最新醫學 Vol.34 No.10

하지의 만성 폐쇄성 혈관질환에서 절단부위 결정을 위한 색조도플러영상의 진단학적 가치

황득수,오홍록,이승진 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.2

There is no definite criteria for the determination of the level of amputation in ischemic limb or diabetic foot. So, We propose our update criterias for this problem as another good method, which are color doppler sonography as a noninvasive method and angiographic imaging as a more accurate but invasive method for the vascularity and its supplimentation in ipsilateral lower extremity as well as Wagner's ischemic index. We are concluded from our experience, as these; 1. Color doppler imaging is a kind of a good method for the determination of the level of amputation in ischemic limb or diabetic foot of lower extermity, even than Wagner's ischemic index. 2. The wound healing of diabetic foot is more difficult than any other foot disease such as Buerger's disease or atherosclerotic vascular disease in our experience.

전위성 단순 경골 간부골절의 치료에 있어서 보존적 요법과 수술적 요법의 비교 관찰

황득수,변기용 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2

Until recently, the treatment of tibia shaft fractures become one of the most controversial subjects in orthopaedic surgery. One groups insisted that this fractures should primarily be treated with conservative methods, the other groups open reduction & internal fixation has been recommended. Among the nature of fracture patterns, displaced closed or grade 1 open, spiral, oblique and transverse fractures(types Al, A2 and A3 according to Johner's and Wruhs's classification) are still controversial about treatment method. Some auther's have been compared both methods of treatment without detailed criteria. Recently Den Outer compaired both treatments with detaliled criteria and reported that conservative treatment are more preferable. We also compaired retrospectively both treatment methods and the obtained results were, except more complications with conservative treatment, encouraging to us for choosing operative treatment. That is, less malunion and shortening, less delayed union and less disability after fracture healing.

고관절 비구순 파열의 관절경적 치료 : 2~7년 추시 결과 2 to 7 Year Follow Up

황득수,김영모,김경천,안성환 대한고관절학회 2004 Hip and Pelvis Vol.16 No.1

Danis-Weber B형 족관적 골절의 치료에 있어서 Antiglide 금속판의 적용에 관한 임상적고찰

황득수,박원 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

Recentely, Posterior antiglide plate have been introduced as a method of fixation for the short obliquefracture of the fibula, ie Danis-Weber type B or Lange-Hansen classification Supination-External rotation type. This plate functions like a buttress plate, which is applied to an oblique fracture to capture the fragment whose spike is opposite the cortex that will be adjacent to the plate. The author analysed 23 cases of ankle fracture(Danis-Weber Type B) which were admitted and treated in Orthopedic Department Chungnam National Hospital from March 1989 to March 1992. The following results were obtained. 1. Posterior antiglide plate fixation is possible in most of the Danis-Weber Type B ankle fracture, especially for stabilization in older patients with osteoporosis. 2. This operative method has several advantages, ie, easy applicable to plate fixation without prebending, less operative time and no potential for penetration of a screw into the joint. 3. When lag screw is inserted across the fracture site, it is no more priority than without intercomplementary screw fixation for stability, but can be closed the fracture gap easily with more anatomical reduction.

족관절의 방사선적 탐구

황득수,진영안 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

It is generally agreed the best clinical results in treatment of injuries of the ankle are obtaind by anatomical restoration of the joint. For objective measurements of tibiotalar joint, some investigators used different criteria and defined the specific reference points under variable angle of internal rotation Ant- Post. Projection. But, occasionally we didn't acquire the accurate roentgenographic finding that was suggested by investigators. so, we check the varible angle of internal rotation film in addition to angle suggestion by investigators and compare the criteria between them. 1. There was no significant difference to measure the accuracy of medial clear space in according to variable rotation angle. 2. The overlapping distance of tibiofibula syndesmosis decreased by increasing internal rotation angle, but was not under 1mm(ie, index of injury) 3. To measure the weber's 3 criteria, we need to check the variable internal rotation ankle, if necessary. 4. We acquired the normal range of measurement about Tile's 2 criteria by variable internal rotation angle.

경골 Pilon 골절의 수술적 치료 : 제한적 내고정술을 겸한 외고정술과 관혈적 정복 및 내고정술의 비교 Comparison of Limited Open Reduction and External Fixation with Open Reduction and Internal Fixation

황득수,양준영,정제택 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2

The pilon fracture result from axial compression and rotational forces causing variable degrees of metaphyseal disruption, articular damage and malleolar displacement. It's managements are closed reduction and plaster immobilization, skeletal traction, fibular stabilization alone, limited open reduction and external fixation, open reduction and internal fixation, primary arthrodesis, and even immediate amputation. Recently limited open reduction and external fixation has been proved to provide good clinical results for the severely comminuted or open pilon fractures. Authors reviewed eighteen cases of the pilon fractures from March 1991 to February 1997. Among them eight cases were treated with limited open reduction and external fixation, and ten cases were treated with open reduction and internal fixation. In conclusion, limited open reduction and external fixation has shown better results than open reduction and internal fixation in severely comminuted or open pilon fractures for wound healing and preventing of other complications.

하지 허혈성 괴사 병변의 절단 위치 결정

옹상석,황득수 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

Many amputation have to be done because of complications from peripheral vascular disease or diabetes. Performing the amputation at the most distal level where healing will promptly occur and where the patients symptoms will be relieved will achieve maximum restoration of function. The decision of level of amputation and wound healing depend on local vasculality. There are many effort directed toward identifying reliable predictors of wound healing in ischemic limb. Various non-invasive vascular studies have been reported to provide valuable data for selection of the optimum level of amputation in limbs in patients who have avascular disease. We evaluated two such method: (1) determination, by the Doppler ultrasound, of segmental blood pressure and ischemic index (2) measurement of the temperature of the skin. The records of seventy-five patients (eighty amputations) were retrospectively reviewed for correlations between the result of the vascular studies and the outcome of the amputation. Among the methods, Ischemic index was most reliable predictors for healed amputation ( 94.6%), and measurement of skin temperature were less reliable (70.8%).