1.Bony lesions of professional divers in Korea.
Myung Chul YOO ; Yoon Jae CHO ; Sang Gweon LEE
The Journal of the Korean Orthopaedic Association 1992;27(1):331-340
No abstract available.
Korea*
2.A-V fistula after Palma-Dale crossover venous graft operation in iliac vein occlusion
Sang Seob YOON ; Seung Jin YOO ; Yong Bok KOH
Journal of the Korean Society for Vascular Surgery 1991;7(1):102-107
No abstract available.
Fistula
;
Iliac Vein
;
Transplants
3.The Clinical Applicability of Power Spectral Analysis of Heart Rate Variability in the Initial Phase of Hemorrhagic Shock.
Sang Won CHUNG ; Yoo Sang YOON ; Yoo Sun KIM ; Seung Ho KIM ; Hahn Shick LEE ; Hoon Sang CHI
Journal of the Korean Society of Emergency Medicine 2000;11(1):44-53
No abstract available.
Heart Rate*
;
Heart*
;
Shock, Hemorrhagic*
4.Two cases of Cornelia de Lange syndrome.
Yoon Jong YOO ; Ki Chan NA ; Ho Seong YOO ; Sang Kee PARK ; Young Bong PARK
Journal of the Korean Pediatric Society 1992;35(5):684-690
No abstract available.
De Lange Syndrome*
5.An Analysis of Stress Pattern in the Coracoclavicular Ligaments with Scapular Movements: A Cadaveric Study Using Finite Element Model.
Yoon Sang KIM ; In Sung KIM ; Yon Sik YOO ; Seong Wook JANG ; Cheol Jung YANG
Clinics in Shoulder and Elbow 2015;18(3):152-158
BACKGROUND: Acromioclavicular (AC) stability is maintained through a complex combination of soft-tissue restraints that include coracoclavicular (CC), AC ligament and overlying muscles. Among these structures, the role of the CC ligament has continued to be studied because of its importance on shoulder kinematics, especially after AC injury. This study was designed to determine the geometric change of conoid and trapezoid ligaments and resulting stresses on these ligaments according to various scapular motions. METHODS: The scapuloclavicular (SC) complex was isolated from a fresh-frozen cadaver by removing all soft tissues except the AC and CC ligaments. The anatomically aligned SC complex was then scanned with a high-resolution computed tomography scanner into 0.6-mm slices. The Finite element model of the SC complex was obtained and used for calculating the stress on different parts of the CC ligaments with simulated movements of the scapula. RESULTS: Average stress on the conoid ligament during anterior tilt, internal rotation, and scapular protraction was higher, whereas the stress on the trapezoid ligament was more prominent during posterior tilt, external rotation, and retraction. CONCLUSIONS: We conclude that CC ligament plays an integral role in regulating horizontal SC motion as well as complex motions indicated by increased stress over the ligament with an incremental scapular position change. The conoid ligament is the key structure restraining scapular protraction that might occur in high-grade AC dislocation. Hence in CC ligament reconstructions involving only single bundle, every attempt must be made to reconstruct conoid part of CC ligament as anatomically as possible.
Biomechanical Phenomena
;
Cadaver*
;
Dislocations
;
Ligaments*
;
Muscles
;
Scapula
;
Shoulder
6.The Relationship between passive smoking, residential districts, their modes of living quarters and value of immunoglobulin in asthmatic children.
Sang Heun LEE ; In Mok YOO ; Dong Wook KIM ; Myung Kee RAH ; Bang Bu YOON
Journal of the Korean Academy of Family Medicine 1997;18(4):439-444
BACKGROUND: Smoking increases the risk of respiratory, cardiac diseases and cancer. This study is to ascertain the relationship between passive smoking, the modes of residence, its location and the immunoglobulin values as well as the eosinophil counts in relation to child patients suffering from bronchial or cardiac asthma. METHODS: The research was conducted at a general hospital with cooperation of 242 patients who had been hospitalized 1991 through 1995. We compared the average values of immunoglobulin between the groups of exposed and non-exposed to smoking by T-test. A same work for residential modes was done by T-tests, while the data regarding the residing locality were processed by ANOVA. RESULTS: Each values of TEC, IgE, IgA, and IgM in both groups has been analysed but spelling no significant differences. The group residing in apartments showed lower value of IgM than those of flats. CONCLUSIONS: The reason the IgM value of apartments is lower than that of flats is due to the difference of living quarters. This signifies the modes of residence may as well affect the IgE value.
Asthma
;
Child*
;
Eosinophils
;
Heart Diseases
;
Hospitals, General
;
Humans
;
Immunoglobulin A
;
Immunoglobulin E
;
Immunoglobulin M
;
Immunoglobulins*
;
Smoke
;
Smoking
;
Tobacco Smoke Pollution*
7.Simple Auxiliary Liver Transplantation without Bile Duct Reconstruction in the Rat.
Chang Hyun YOO ; Sang Su LEE ; Myung Hee YOON
The Journal of the Korean Society for Transplantation 1999;13(1):39-44
There has been numerous experimental liver transplantation models in the rodent : orthotopic versus hetrerotopic; whole liver versus partial liver; microvascular suture versus cuff method in technical aspects. Several simplified modifications were introduced for experimental liver transplantation for improving animal-survival rate. Liver transplantation without arterial reconstruction, the cuff tchnique or stent method were the examples of simplifing modification. In practice, complications related to biliary reconstruction are frequent causes of intraabdominal infection in our rat liver transplantation. Here we propose using simple liver transplantation model of partial heterotopic liver transplantation without artery and bile duct reconstruction in the studies which need only observation of immediate graft survival or very short-term follow-up. Here we examined the serial histologic changes of auxiliary liver grafts without biliary reconstruction during short period after transplantation. Until 7 days of transplantation, bile duct proliferation was confined in the portal area of grafts and did not distort the lobular structure. Early graft-survival and rapid immunologic response might be evaluated by this easy transplantation model.
Animals
;
Arteries
;
Bile Ducts*
;
Bile*
;
Graft Survival
;
Intraabdominal Infections
;
Liver Transplantation*
;
Liver*
;
Rats*
;
Rodentia
;
Stents
;
Sutures
;
Transplants
8.Simple Auxiliary Liver Transplantation without Bile Duct Reconstruction in the Rat.
Chang Hyun YOO ; Sang Su LEE ; Myung Hee YOON
The Journal of the Korean Society for Transplantation 1999;13(1):39-44
There has been numerous experimental liver transplantation models in the rodent : orthotopic versus hetrerotopic; whole liver versus partial liver; microvascular suture versus cuff method in technical aspects. Several simplified modifications were introduced for experimental liver transplantation for improving animal-survival rate. Liver transplantation without arterial reconstruction, the cuff tchnique or stent method were the examples of simplifing modification. In practice, complications related to biliary reconstruction are frequent causes of intraabdominal infection in our rat liver transplantation. Here we propose using simple liver transplantation model of partial heterotopic liver transplantation without artery and bile duct reconstruction in the studies which need only observation of immediate graft survival or very short-term follow-up. Here we examined the serial histologic changes of auxiliary liver grafts without biliary reconstruction during short period after transplantation. Until 7 days of transplantation, bile duct proliferation was confined in the portal area of grafts and did not distort the lobular structure. Early graft-survival and rapid immunologic response might be evaluated by this easy transplantation model.
Animals
;
Arteries
;
Bile Ducts*
;
Bile*
;
Graft Survival
;
Intraabdominal Infections
;
Liver Transplantation*
;
Liver*
;
Rats*
;
Rodentia
;
Stents
;
Sutures
;
Transplants
9.An experimental study on the cytotoxicity of various orthodontic bands.
Dong Hwan YOO ; Yoon Ah KOOK ; Sang Cheol KIM
Korean Journal of Orthodontics 1994;24(2):419-432
The purpose of this study was to investigate the cytotoxicity of orthodontic bands in vitro and in vivo.4 types of orthodontic bands were applied to cultured fibroblast and the supermatants were injected into dorsal subcutaneous tissue of mice. In vitro, the cytotoxixity was evaluated by an MTT assay after 2 and 6days.In vivo, the histopathologic observation was performed 2 days after injection. The results were: 1. The cell viability was significantly decreased in the group added phosphoric acid in comparison to control group, but there was not any significance among the experimental group after 2 days. 2. Cell viability decreased in the high Ni containing group after 6 days. 3. The histopathological finding was that the Cr-containing group showed severe infiltration of inflammatory cells and muscular destruction.
Animals
;
Cell Survival
;
Fibroblasts
;
Mice
;
Subcutaneous Tissue
10.A histologic and autoradiographic study on the early changes in the movements of rat incisors.
Ki Whan YOO ; Sang Cheol KIM ; Yoon A KOOK
Korean Journal of Orthodontics 1993;23(2):199-216
The purpose of this study was to quantify the biologic effects of the tensile forces from helical springs across the maxillary incisors on the periodontal tissues of rats. 39 Sprague-Dawlely rats were divided into a control group(3 rats) and three experimental groups(36 rats)-group 1, pressured with a light force(50-75g), group 2, with a heavy force(250-300g) and group 3, with a heavy force(250-300g) plus laser irradiation. Autoradiographic and histopathologic observations were performed in 12, 24, 48 and 96 hours after force application. The result were as follow: 1. Hyalinized zone of periodontal ligament began to appear at pressure side in 12 hours in group 2 and group 3 ; all decreased in 96 hours except in group 2. 2. Alveolar bone resorption began to appear in 12 hours in group 2 and group 3 ; Group 2 showed more resorption than group 1 and no difference to group 3. 3. Tearing of periodontal ligament and vascular dilatation began to appear at tension side in 12 hours in all groups ; Group 2 showed more changes than group 1 and no difference to group 3 ; Decrease began to appear in 96 hours. 4. New bone formation began to appear at tension side in 12 hours and increased more and more; No differences were shown of groups 5. New capillary proliferation began to appear at pressure side in 12 hours; The changes were the greatest in group 3, group 2, group 1, in that order. 6. Positive reaction of cells to [3H]-thymidine was the greatest in 24 hours of all groups and decreased with times ; Group 2 showed more reaction than group 1 and no difference to group 3.
Animals
;
Bone Resorption
;
Capillaries
;
Dilatation
;
Hyalin
;
Incisor*
;
Osteogenesis
;
Periodontal Ligament
;
Rats*