1.The effect of facet geometry on unilateral lumbar disc protrusion.
Myung Sang MOON ; Kyu Sung LEE ; Chang Whan HAN
The Journal of the Korean Orthopaedic Association 1991;26(3):673-683
No abstract available.
2.An analysis of the pulmonary lobe using computed tomography
Sang Il SUH ; Myung Whan HAN ; Jeong Dong JEON ; Chang Yul HAN
Journal of the Korean Radiological Society 1984;20(3):473-479
Computed Tomograms of 45 patients with or without lung mass were reviewed to determine the characteristics of the major and minor fissures. Also pulmonary vascular distibutions were analyzed to localize each pulmonary lobe. The results were as follows; 1. Each major fissure area was imaged frequently as lucent band, less frequently dense band. 2. The minor fissure areas were imaged as oval or triangular lucent zones. The oval or triangularlucent zones were as same frequency. 3. Avascular planes without above mentioned lucent zones were also correspond to minor fissure areas. 4. Slices of avascular zones were observated between pulmonary arteries to posterior segment or apicoposterior segment of upper lobe and to superior segement of lower lobe on both lungs.
Humans
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Lung
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Pulmonary Artery
3.The radiological evaluation of pulmonary metastases from gastric carcinoma
Myung Whan HAN ; Jin Woo KIM ; Chang Yul HAN ; Soo Soung PARK
Journal of the Korean Radiological Society 1985;21(4):573-580
Twenty cases of pulmonary metastases from pathologically proven stomach carcinoma were studies with specialreference to the clinico-radiological findings and the grades of cell-differentiation of stomach carcinoma. Theywere calssifed into five types based on the pattern of chest X-ray findings according to the reportedclassifications of metastatic pulmonary carcinoma. The radiological appearance of pulmoanry metastases formstomach carcinoma was didffferent from that of usual pulmonary metastatic cancers. The Type IV metastatic form(Type IV-Progressive increasing interstitial lung markings and then infiltration of pulmonary parenchyme with orwithout evidence of pleural effusion.) was most commonly seen in stomach carcinoma particularly in poorlydifferentiated cell type and more associates with respiratory symptoms than others.
Lung
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Neoplasm Metastasis
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Stomach
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Thorax
4.Melorheostosis: Report of 2 Cases
Myung Sang MOON ; Han Joo KIM ; Byeong Han KONG ; Seok Whan SONG
The Journal of the Korean Orthopaedic Association 1985;20(1):190-194
Melorheostosis is a rare disease entity of bone with an etiology and pathogenesis. It cause pain and stiffness in an affected limb, and dense bone formation along the side of bone resembles the flow of candle dripping. Two cases of the disease involving left hand and wrist, and right lower leg are reported with the review of literature.
Extremities
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Hand
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Hyperostosis
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Leg
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Melorheostosis
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Osteogenesis
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Rare Diseases
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Wrist
5.Reconstruction of Large Bone Defect after Wids Segmental Resection of Long Bone Tumors Using the Free Vascularized Fibular Graft
Myung Chul YOO ; Duke Whan CHUNG ; Jung Soo HAN ; Moon Ho SHIN
The Journal of the Korean Orthopaedic Association 1988;23(3):861-869
In certain low-grade malignant tumors and tumors that have a frequent recurring tendency in long bone, the wide segmental resection can cure and prevent to recur. But a main problem is prserving of bony continuity in bony defect site due to wide segmental resection. The traditional bone graft have the high incidence in non-union, malunion, delayed union, bony reabsorption, stress fracture despite long immobilization and stiffness of adjacent joint. We have attempted to overcome these problems by using a microvascular technique to transfer the fibula with its peroneal vascular pedicle as a living bone graft. From February 1980 to August 1986, we tried the reconstruction of wide bone defect after segmental resection at long bone tumors in 10 cases, using Vascularized Fibular Graft. The types of tumors were malignant fibrous histiocytoma in 2 cases, fibrous dysplasia in 2 cases, simple bone cyst in 1 case, giant cell tumor in 2 cases, cavernous hemangioma in 2 cases and multiple exostosis in 1 case. An average follow-up was 48 months, average bone defect after wide segmental resection of lesion was 12.3cm.These all cases revealed the good bony union in average 4.5 months, the free ambulation without external immobilization was got in average 6 months. And we got the wide range of motion of adjacent joint without recurrence and serious complications.
Bone Cysts
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Exostoses, Multiple Hereditary
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Fibula
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Follow-Up Studies
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Fractures, Stress
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Giant Cell Tumors
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Hemangioma, Cavernous
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Histiocytoma, Malignant Fibrous
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Immobilization
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Incidence
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Joints
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Range of Motion, Articular
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Recurrence
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Transplants
;
Walking
6.Surgical Treatment of Brachial Plexus Injury
Myung Chul YOO ; Duke Whan CHUNG ; Jung Soo HAN ; Keun Young LEE
The Journal of the Korean Orthopaedic Association 1988;23(4):1165-1173
The author has reviewed 62 patients with brachial plexus injuries who treated at Department of orthopaedic Surgery, Kyung Hee University Hospital during the period from Dec. 1978 to June 1985. Among these, conservative treatment was performed in 8 patients, 64 cases of 54 patients were treated by 4 types of operation, that is, exploration with neurolysis, neurorraphy, nerve graft and neurotization for restoration of elbow flexion, wrist, finger flexion and shoulder abduction. The patients were followed up more than one year to five years and eight months, average being two yesrs and six months. The whole arm type injury was the most common. The trunk level was the most common. The prognosis of whole arm type was the most severe. And the prognosis of supraclavicular lesion was worse than that of infraclavicular. There were two types of treatment, conservative treatment in 8 patients, operative treatment in 54 patients. By comparing results according to methods of treatment, neurotization with intercostal nerve were useful in avulsion cases of unsatisfactory results following neurolysis, neurorraphy and nerve graft. The operation time of the first three months to six months after injury gave the best chance of success. The result of conservative treatment in all 8 patients was poor.
Arm
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Brachial Plexus
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Elbow
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Fingers
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Humans
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Intercostal Nerves
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Nerve Transfer
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Prognosis
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Shoulder
;
Transplants
;
Wrist
7.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
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Brachial Plexus
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Elbow
;
Follow-Up Studies
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Humans
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Methods
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Paralysis
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Poliomyelitis
;
Shoulder Joint
;
Shoulder
;
Upper Extremity
8.Free Vascularized Epiphyseal Transplantation, for Epiphyseal Injury in Children
Myung Chul YOO ; Duke Whan CHUNG ; Jung Soo HAN ; Moon Ho SHIN ; Ki Nham NHA
The Journal of the Korean Orthopaedic Association 1988;23(6):1477-1484
It is difficult to treat the children with the growing deformity of long bone due toepiphysealloss or absence, because resulting deformith and discrepancy of limb length is progressive. There were many conventional treating methods including the lengthening and shortening, corrective osteotomy, and epiphysiodesis. But these procedures result in inadequate results, and there are limitation in treatment of these children. We tried the free vascularized epiphyseal transplantation using the proximal fibular epiphysis in 3 patients with epiphyseal injury or loss due to old tauma, wide excision of multiple exostosis and congenital clubhand. The duration of follow-up was from 20 months to 57 months, and the lengthening of the transplantedepiphyses was evaluated by the scanogram inregular interval. As final radiologic check, each transplanted epiphyseal growth was 1cm for 24months in case 1, 0.9 cm for 10 months in case 2, 1 cm for 24 months in case 3 (av. 1.3cm for 24 months) and the adjacent joint function was good. There was no gross deformity.
Child
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Congenital Abnormalities
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Epiphyses
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Exostoses, Multiple Hereditary
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Extremities
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Follow-Up Studies
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Humans
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Joints
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Osteotomy
;
Transplantation
9.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
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Neck
;
Skin
10.Nonsuture Microvascular Anstomosis Using the unilink Apparatus
Myung Chul YOO ; Duke Whan CHUNG ; Jung Soo HAN ; Gi Un NAM
The Journal of the Korean Orthopaedic Association 1994;29(4):1268-1276
Suture microvascular anastomosis is time-consuming and tedious and demands long and continuous training. The Unilink instrument system is a fast and simple method to achieve high patency rates without long and continuous training in the anastomosis of small vessels. The author experimentally studied the carotid arteries and facial veins of 14 rabbits with an average weight of 1900 gm using the unilink apparatus. A total of 27 arterial and venous anastomoses were performed. We examined the postoperative patency at immediate, 2 weeks, and 8 weeks. The results were as followings; 1. All anastomosed vessels were fully patent just after operation and at 2 weeks(100%), but one of the arterial anastomosis was thrombotized at 8 weeks(90%) 2. The mean time for completion of the anastomosis were 8.5 minutes(range 6-15) in arteries and 6.2 minutes.(range 4-10) in veins. 3. The cases having partial obliterations were 3 cases(15%) under the operating microscope. 4. At the histological examination, the thickness of vessel wall was decreased due to moderate atrophy of the media and mild degree of nonspecific chronic inflammation was seen around the unilink apparatus. 5. A case of the arterial anastomosis was released with acting out at 15 minutes after operation, and a case of arterial anastomosis showed complete oblieration at postoperative 8 weeks. 6. The important factors in the technical problems were the proper selection of the ring size and optimal fitting between two rings. The Unilink method provides a very safe, fast, and simple way to perform microvascular anastomoses.
Acting Out
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Arteries
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Atrophy
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Carotid Arteries
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Inflammation
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Methods
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Rabbits
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Sutures
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Veins