1.A study of the abnormal cutaneous vascular response in atopic dermatitis.
Jae Myung YOO ; Hong Jig KIM ; Kyu Wang WHANG
Korean Journal of Dermatology 1991;29(1):26-31
The delayed blanch is one of the most discussed but undecided facets of atopic dermatitis as yet. At present, they favor the theory that delayed blanch is due to vasoconstriction, but it is not obvious whether this is due to "true" vasoconstriction or to the blood vessels being narrowed by the surrounding exudative edema, resulted from vasodilatation and increased capillary per meability. We compared cutaneous response of severe atopic dermatitis with that of age matched non-atopic individuals after intradermal injection of acetylcholine by means of naked eye and laser Doppler flowmeter examination, control group showed flare and wheals while at,opy group resulted in delayed blanch in addition to flare and whealing. The results of laser Doppler flowmeter examination revealed that, as compared to baseline, atopy group showed statistically significantly increase in spite of delayed blanch. We suggested that the delayed blanch may be not due ta va.soconstriction but due to the vasadilatation and aceumulation of edema fluid.
Acetylcholine
;
Blood Vessels
;
Capillaries
;
Dermatitis, Atopic*
;
Edema
;
Flowmeters
;
Injections, Intradermal
;
Vasoconstriction
;
Vasodilation
2.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*
3.Legg-Calve-Perthes Disease
Myung Chul YOO ; Byung Ho KIM ; Jae Yong AHN
The Journal of the Korean Orthopaedic Association 1987;22(1):73-84
237 patients with Legg-Calve-Perthes disease were treated during past 12 years. Among them, a comparative study was done for 87 patients who were followed up over 2 years. They were analyzed according to Catteralls classification and divided into a group of conservative treatment and of surgical treatment. 74 patients were boys and 13 patients were girls and the ratio of boys to girls was 5.7 to 1. The mean age was about 6.9-year-old. Bilateral involvement was observed in 6 patients. According to Catterall classification. 1(1.1%) was classified as group I, 27(29.0%) as group II, and 36(38.7%) as group III, and 29(31.2%) as group IV. According to assessment by Harrison et al., satisfactory result was achieved in 63.2% of cases of conservative treatment and 34.3% of cases of operative treatment. The measurement of epiphyseal quotient and femoral head sphericity(by Mose) were considered meaningful methods for assessing the result of the treatment. The most frequent one of “Head-at-Risk” factors was lateral subluxation of femoral head. The result of treatment was not always coincided with the classification by Catterall. In bilateral involvement, the first affected hip had better prognosis than contralateral one.
Classification
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Female
;
Head
;
Hip
;
Humans
;
Legg-Calve-Perthes Disease
;
Prognosis
4.Clinical Study of Isolated Anterior Cruciate Ligament Injury
Jin Hwan AHN ; Jae Yong AHN ; Myung Chul YOO ; Jae Sung AHN
The Journal of the Korean Orthopaedic Association 1987;22(5):1055-1063
The anterior cruciate ligament injury is one of the most common ligament injury of the knee joint, and anterior cruciate ligament is as important structure for stabilization as a primary restraint. Noyes reported that the diagnosis of a tek of the anterior cruciate ligament was made by the original treating physician in only 6.8%. And there are many controversies in its treatment. It is certain thatearly diagnosis and treatment are th most important clue. Authors studied 48 patients of isolated anterior cruciate ligament injury who were diagnosed by same physician from Jan. 1983 to Dec. 1985 after follow ups ranging from six mnths to 4 years, average beimng one year and two months. The results were as followings: 1. The most common cause was sports injury. 2. The most common sign and symptom were hemarthrosis in acute injury and giving way in chronic injury. 3. Anterior drawer test without anesthesia had 25% of diagnostic accuracy but pivot shift test under anesthesia 95.8%. 4. 31 cases in 48 cases (64.8) had associated meniscal injury. 5. In acute torn ACL, the primajy repair was preparable but conservative treatment with arthroscopic partial menisectomy was eful in chronic case.
Anesthesia
;
Anterior Cruciate Ligament
;
Athletic Injuries
;
Clinical Study
;
Diagnosis
;
Follow-Up Studies
;
Hemarthrosis
;
Humans
;
Knee
;
Knee Joint
;
Ligaments
5.A Clinico-Epidemilological Study of 55 Cases of Chidhood Idiopathic Thrombocytopenic Purpura.
Won Ho KANG ; Myung Hee KOOK ; Yong Sang YOO ; Jae Suk MA ; Tai Ju HWANG
Journal of the Korean Pediatric Society 1987;30(11):1207-1212
No abstract available.
Purpura, Thrombocytopenic, Idiopathic*
6.A radiologic evaluation of fit of noncemented prosthetic femoral stems.
Myung Chul YOO ; Yong Girl RHEE ; Young Woo KIM ; Jong Jin KIM ; Yong Jae KIM
The Journal of the Korean Orthopaedic Association 1993;28(1):1-10
No abstract available.
7.Protective Effect of Flavonoids on Lymphocyte DNA Damage Using Comet Assay.
Yoo Kyoung PARK ; Eun Jae JEON ; Myung Hee KANG
The Korean Journal of Nutrition 2003;36(2):125-132
The present study was attempted to investigate and compare the antioxidant potency of several well-know flavonoids, antioxidant vitamin and commercially available popular beverages. The antioxidant potency was assessed by the effect on reducing oxidative DNA damage of human lymphocytes. Cellular oxidative DNA damage was measured by SCGE (single-cell gel electrophoresis), also known as comet assay. Lymphocytes were pre-treated for 30 minutes with wide ranges of doses of apigenin, kaempferol, luteolin, myricetin, rutin, quercetin, alpha-tocopherol (10,25,50,100,200,500,1000 micrometer) ,green tea extract or grape juice (10,50,100,250,500,1000 microgram/mL) followed by a H2O2(100 micrometer) treatment for 5 min as an oxidative stimulus. The physiological function of each antioxidant substance on oxidative DNA damage was analyzed as tail moment (tail length X percentage migrated DNA in tail) and expressed as relative DNA damage score after adjusting by the level of control treatment. Cells treated with H2O2 alone (positive control) had an extensive DNA damage compared with cells treated with phosphate buffered saline (PBS, negative control) or pre-treated with all the tested samples. Of all the six flavonoids, quercetin was the most potent antioxidant showing the lowest ED50 of 8.5 microgram/mL (concentration to produce 50% protection of relative DNA damage). The antoxidant potency of individual flavonoids were ranked as follows in a decreasing order; luteolin (18.4 microgram/mL), myricetin (19.0 microgram/mL) , rutin (22.2 microgram/mL) , apigenin (24,3 microgram/mL) , kaempferol (25.5 microgram/mL). The protective effect of alpha-tocopherol was substantially lower (highest ED50 value of 55.0 microgram/mL) than all the other flavonoids, while the protective effect was highest in green tea and grape juice with low ED5O value of 7.6 and 5.3, respectively. These results suggest that flavonoids, especially quercetin, and natural compounds from food product, green tea and grape juice, produced powerful anti-oxidative activities, even stronger than alpha-tocopherol. Taken together, supplementation of antioxidants to lymphocytes followed by oxidative stimulus inhibited damage to cellular DNA, supporting a protective effect against oxidative damage induced by reactive oxygen species.
alpha-Tocopherol
;
Antioxidants
;
Apigenin
;
Beverages
;
Comet Assay*
;
DNA Damage*
;
DNA*
;
Flavonoids*
;
Humans
;
Luteolin
;
Lymphocytes*
;
Quercetin
;
Reactive Oxygen Species
;
Rutin
;
Tea
;
Vitamins
;
Vitis
8.Shoulder Arthrodesis for Improvement of Improvement of Function of Upper Extremity
Myung Chul YOO ; Duke Whan CHUNG ; Jung Soo HAN ; Hwang Keon CHO ; Jae Sung AHN
The Journal of the Korean Orthopaedic Association 1988;23(4):1031-1038
The shoulder fusion is one of the good method to relieve pain, improve the function and stabilize the flail shoulder joint. But recent advance of arthroplasty, the procedure is less popular. Authors studied and analized 23 patients who received shoulder arthrodesis from Aug. 1978 to Aug. 1986 and reported functional outcome after shoulder arthrodesis. Among twenty three patients, brachial plexus palsy were eighteen, upper extremity residual poliomyelitis in three and shoulder joint turberculosis in two respectively. Postoperative follow up was 12 months to 9 years and 6 months, average being 2 years and 6 months. It took 14.4 weeks in average for shoulder arthrodesis. The postoperative abduction fusion angle was 33.8 degrees in average(20 degrees to 50 degrees). The active abduction after shoulder fusion was mean 51.8 degrees(20 degrees to 85 degrees). The abduction fusion angle between 20 degrees and 40 degrees was presented satisfactory results in the point of pain relief, functional assessment and patients satisfaction. High abduction fusion angle(more than 40 degrees) revealed pain around the fused shoulder area. The combined extra and intraarticular arthrodesis revealed better results. The Saber-cut approach was more valuable for secondary elbow reconstruction than Henry approach.
Arthrodesis
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Arthroplasty
;
Brachial Plexus
;
Elbow
;
Follow-Up Studies
;
Humans
;
Methods
;
Paralysis
;
Poliomyelitis
;
Shoulder Joint
;
Shoulder
;
Upper Extremity
9.The Interlocking Kuntscher IM Nailing for Femur Shaft Fracture
Myung Chul YOO ; Yong Girl LEE ; Jin Hwan AHN ; Jae Sung AHN ; Bong Keun KIM
The Journal of the Korean Orthopaedic Association 1988;23(6):1529-1540
The intramedullary nailing is a good method of treatment in femur shaft fracture but it is not available in some fracture pattern or fracture level. And it is very difficult with conventional Kiintscher nailing to prevent torsional stress and fix rigidly in unstable fracture of the femur shaft. The unstable fracture by comminuted fracture or segmental fracture, nonunion and pathologic fracture needed the rigid fixation. Interlocking Kuntscher IM nailing can provide antitorsional stability, good axial alignment and prevent shortening of the fracture site, also allow early ambulation and joint exercise. We analysed 51 patients 52 cases of interlocking Kiintscher IM nailing from May 1981 to March 1988. The interlocking Kuntscher IM nailing prevents the rotational and axial roading. The interocking Kuntscher IM nailing has expanded its application in fracture pattern and fracture site. The interlocking IM nailing provides rigid fixation in severe comminuted fracture. segmental fracture, long spiral fracture, and other several unstable fractures and eliminates splinting or external supports, so it is possible doing early joint exercise. The interlocking Kuntscher IM nailing was also considered best internal fixation method in pathologic fracture or sever osteoporosis. The static interlocking for rigid fixation and the dynamic interlocking method for axial compression to fracture site during weight bearing can be adapted appropriately to fracture pattern. Radiation hazard during the interlocking nailing is not considerable.
Early Ambulation
;
Femur
;
Fracture Fixation, Intramedullary
;
Fractures, Comminuted
;
Fractures, Spontaneous
;
Humans
;
Joints
;
Methods
;
Osteoporosis
;
Splints
;
Weight-Bearing
10.Anatomy of Peroneal Buoy Flap
Myung Chul YOO ; Duke Whan CHUNG ; Jung Soo HAN ; Moon Ho SHIN ; Youn Jae CHO
The Journal of the Korean Orthopaedic Association 1989;24(2):565-570
Authors analysed 36 cases(33 patients) of Peroneal Buoy Flap to investigate branching pattern, course, length of vascular pedicle, and perforating level of the perforating cutaneous branches from Oct. 1985 to July 1988. The results were as follows. 1. The perforating cutaneous branchea were classified into four types, the Straight Branch (18 cases), the Proximal Oblique Branch (8 cases), the Branch from Muscular Artery (8 cases), the Distal Oblique Branch(2 cases) respectively. The most common patten was Straight Branch. 2. There were 3 pathways of these branches, the most common one passed between the Soleus and Peroneus muscles(23 cases, 64%), and second one passed through the snterior part of Soleus muscle(8 cases, 22%), the third one passed through the posterior part of Peroneus muscle(5 cases, 14%). 3. The length of vascular pedicle in Buoy Flap was variable from 3cm to 15cm, but 27 cases(75%) were distributed between 4cm and 6cm. 4. The perforating level of branches were 6.3cm in average from Fibular Neck, 88% of them were distributed within 10cm. 5. Peroneal Buoy Flap in possible to reconstruct both seperated bone and skin defect in some distance by One-Stage Operation.
Arteries
;
Neck
;
Skin