1.Intramedullary Screw Fixation for Clavicle Shaft Fractures: Comparison of the Anterograde versus the Retrograde Technique.
Yong Girl RHEE ; Nam Su CHO ; Sung Whan CHO ; Jong Hoon SONG
Clinics in Shoulder and Elbow 2016;19(1):8-14
BACKGROUND: The purpose of this study was to investigate the difference between two nailing approaches of intramedullary screw fixation, the retrograde nailing versus the anterograde nailing, on the radiological and clinical outcomes in patients with clavicle shaft fractures. METHODS: From April 2002 to August 2014, we enrolled a total of 22 patients with clavicle shaft fractures to participate in this study. Twelve patients received retrograde intramedullary nailing and 10 received anterograde nailing. The average duration of follow-up was 12 months. In all the patients, we took follow-up radiographs of the anteroposterior and the axial views to assess the postoperative radiological outcomes. We measured the visual analogue scale (VAS) score, American Shoulder and Elbow Surgeons (ASES) score, and the range of motion (ROM). RESULTS: Clinically, we did not find a statistically significant difference in the retrograde group and the anterograde group in terms of the duration to bone union, the VAS score the ASES score and the ROMs. Radiologically, we found that the difference in the clavicle shortening of the affected arm and the unaffected arm did not show a statistically significant difference at the immediate postoperative assessment. we found that the difference in the clavicle shortening of the affected arm between the immediate postoperative and the final follow-up value did not show a statistically significant difference. CONCLUSIONS: We found that both the retrograde nailing and the anterograde nailing gave a favorable outcome for clavicle shaft fractures. Although we saw evidence of clavicle shortening after intramedullary screw fixation, this was not a factor that influenced clinical outcome.
Arm
;
Clavicle*
;
Elbow
;
Follow-Up Studies
;
Fracture Fixation, Intramedullary
;
Humans
;
Range of Motion, Articular
;
Shoulder
2.A clinical study in the diagnostic efficacy of mammography todetecty the breast carcinoma.
Jong Whan CHO ; Seung Hoi PARK ; Hye Soon PARK ; Hong Jun CHO ; Young Sik KIM
Journal of the Korean Academy of Family Medicine 1991;12(11):14-20
No abstract available.
Breast Neoplasms*
;
Breast*
;
Mammography*
3.The Effect of IGF-I on Collagen Synthesis in Cultured Chondrocytes.
Jong Han CHO ; Sang Hoon HAN ; Jong Whan LEE ; Hae Nam HONG ; Seong Who KIM ; Jae Dam LEE
Journal of the Korean Society of Plastic and Reconstructive Surgeons 2000;27(1):46-53
Cartilage is one of the most commonly manipulated tissue in esthetic and reconstructive surgery. Cartilage has an important role in longitudinal bone growth. Anabolic hormones and locally produced peptide growth factors are known to influence this process Matrix composition changes through proliferation, maturation, and differentiation of chondrocytes, and endochondral ossification thereafter. Defined cartilage matrix is synthesized during the maturation of chondrocytes where the major change is the increment of type II collagen. Variable sulfated mucololysaccharides and hyaluronic acid are also synthesized during this maturation. IGF-I(insulin like growth factor-I), so called somatomedin C, is a prominent growth factor in serum. IGF-I is known to be involved in long growth. IGF-I is affected by pituitary growth hormone. There are few studies done on IGF-I effect in cartilage matrix formation and possible changes of collagen subtypes. This experiment was designed to see the IGF-I effect on the colagen synthesis of cultured chondrocytes. Optimal concentration of IGF-I for the experiment was determined using H3-thymidine incorporation into DNA. The IGF-I effect on collagen synthesis was studied using H3-proline. The IGF-I effect on the synthesis of subtypes of collagen was studied using SDS-PAGE and immunocytochemical staining. Chondrocytes were isolated from the ears of New Zealand white rabbit and cultured in 2 X 10(5) cells/300 microgram density. IGF-I increased DNA synthesis, and optimal concentration of IGF-I was determined by dose-relationship curve as 10ng/ml. Collagen synthesis was increased by IGF-I. Type II collagen was increased on SDS-PAGE with IGF-I and this gel electrophoresis showed type X collagen, also. The increase in type II collagen was confirmed with immunocytochemical staining, the reaction becoming stronger with the addition of IGF-I. Type I collagen was not changed with IGF-I on immunocytochemistry. We conclude that IGE-I is an important modulator influencing not only proliferation and maturation but also terminal different-iation of chondrocytes.
Bone Development
;
Cartilage
;
Chondrocytes*
;
Collagen Type I
;
Collagen Type II
;
Collagen Type X
;
Collagen*
;
DNA
;
Ear
;
Electrophoresis
;
Electrophoresis, Polyacrylamide Gel
;
Growth Hormone
;
Hyaluronic Acid
;
Immunohistochemistry
;
Insulin-Like Growth Factor I*
;
Intercellular Signaling Peptides and Proteins
;
New Zealand
4.Analysis of refferal contents from family patients in tertiary carehospital after introduction of health care delivery system.
Seung Hoi PARK ; Jong Whan CHO ; Byung Joo KANG ; Hye Soon PARK ; Hong Jun CHO ; Young Sik KIM
Journal of the Korean Academy of Family Medicine 1991;12(3):11-16
No abstract available.
Delivery of Health Care*
;
Humans
5.The Clinical Applicability of Transoral Transpharyngeal Approach to the Craniovertebral Junction Lesions.
Tae Goo CHO ; Kwan PARK ; Yang Sun CHO ; Chung Hwan BAEK ; Do Hyun NAM ; Jong Soo KIM ; Seung Chyul HONG ; Hyung Jin SHIN ; Whan EOH ; Jong Hyun KIM
Journal of Korean Neurosurgical Society 2000;29(3):379-388
No abstract available.
6.Coronary Less Shortening Wallstent in the Long Lesion of Coronary Disease : Immediate Results.
Yang Soo JANG ; Seung Whan LEE ; Jong Hyun KIM ; Jong Won HA ; Nam Sik CHUNG ; Won Heum SHIM ; Seung Yeon CHO ; Hong Keun CHO
Korean Circulation Journal 1996;26(5):948-955
BACKGROUND: Although the first coronary Wallstent implantation ushered in a new era in interventional cordiology with the purpose of circumventing the two major limitations of coronary balloon angioplasty, early acute occlusion and late restenosis, the previous investigators have reported a high rate of subacute occlusion after Wallstent implantation. However, recent studies have reported a low incidence rate of subacute closure and restenosis using the newly modified coronary Less Shortening in aortocoronary vein grafts. The present study reports the immediate results of the Less Shortening Wallstent Implantation for 21 diffuse native coronary lesions in 20 patients. METHODS: Twenty patients were enrolled at the Yonsei Univ. Cardiovasular Center of medical College, Yonsei University in Seoul, Korea from March 1996 through May 1996. The specific angiographic criteria for enrollment included at least 75% diameter stenosis, according to the estimate of two investigatior ; a lesion that was 20mm or more in lenght and a vessel diameter of at least 2.5mm. Bail-out procedure was performed in the case of abrupt closure or threatened closure, defined as a dissection and over 50% residual stenosis of the artery. RESULTS: The coronary Less Shortening Wallstents were successfully implanted in the 21 diffuse coronary lesions(more than 20mm in length) of the 20 patients(pts), including 7 pts of acute myocardial infarction, 11 pts of unstable angina, and 2 pts of stable angina. Angiographic results after Less Shortening Wallstent were 3.0+/-0.3mm in minimal luminal diameter(MLD), 6.7+/-10.8% diameter stenosis(DS) comparing with pre-stent implantation MLD and DS, respectively, 0.3+/-0.4mm and 89.9+/-8.4%. During the in-hospital phase, no major cardiac event occurred except 2 cases of transmural myocardial infarction, including one of stent thrombosis and one of side branch occlusion, despite of inclusion of 7 cases of threatened occlusion in the long lesion. The peristent spasms were observed in 11 among 21 lesions, although long term significance of peristent spasm is not defined. The relative risk for peristent spasm were 10 times higher when larger stents(expanded stent diameter/reference artery diameter>1.7) were implanted. There was no peristent spasm when stents of which expanded stent diameter 1.4 times smaller than reference artery size ware used. CONCLUSION: The results of this introductory study suggest that new Less Shortening Wallstent may reduce the requirement of multiple stent in the long lesion and a lower rate of thrombotic occusion in comparison to its prototype. Further large scale long term follow-up study is needed to evaluate the role of new Less Shortening Wallstent.
Angina, Stable
;
Angina, Unstable
;
Angioplasty, Balloon, Coronary
;
Arteries
;
Constriction, Pathologic
;
Coronary Artery Disease
;
Coronary Disease*
;
Follow-Up Studies
;
Humans
;
Incidence
;
Korea
;
Myocardial Infarction
;
Phenobarbital
;
Research Personnel
;
Seoul
;
Spasm
;
Stents
;
Thrombosis
;
Transplants
;
Veins
7.New Technique of Flexor Tendon Repair with Endoscopic Exploration.
Jong Seo KIM ; Jin Whan CHO ; Byung Kyu SOHN
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1999;26(1):142-147
Repair of injured tendon especially is still a difficult problem in hand surgery. The challenge is to restore the gliding mechanism of the tendon. Despite increasing knowledge of tendon healing and subsequently better postoperative result, the problem formation of adhesion between the tendon and its direct surroundings remains. It is now agreed that primary repair of both flexor tendon is the treatment of choice with preservation and resto-ration of the tendon sheath. The flexor tendon sheath plays an important role in flexor nutrition, especially for the volar part of the tendon, by secreting the synovial fluid. Although data to data are indications that it will lead to fewer adhesions. Tendon sheath are sometimes restored by autologous graft. It is excellent management that the tendon sheath and pulley system are restored during tendon repair. The method of minimal injury to tendon sheath and pulley is better than restoration of that. The exploration of divided tendon through wound margin with endoscope minimizes sheath and pulley injuries. The blunt extraction of divided tendon from invisible wound site is a risky method for exploration of tendon. This endoscopic method is less traumatic, causes less pain, and requires a minimal incision. And the patient with endoscopic tenorrhaphy can exercise immediately because less operation site discomport and can be discharged early. The new tenorrhaphy technique using endoscope is expected to give better result than conventional method.
Endoscopes
;
Hand
;
Humans
;
Synovial Fluid
;
Tendons*
;
Transplants
;
Wounds and Injuries
8.Microsurgical Anatomy in Transoral Odontoidectomy.
Kwan PARK ; Sang Koo LEE ; Tae Goo CHO ; Jung Il LEE ; Do Hyun NAM ; Jong Soo KIM ; Seung Chyul HONG ; Hyung Jin SHIN ; Whan EOH ; Jong Hyun KIM
Journal of Korean Neurosurgical Society 2000;29(3):309-316
No abstract available.
9.Intramedullary Screw Fixation for Clavicle Shaft Fractures: Comparison of the Anterograde versus the Retrograde Technique
Yong Girl RHEE ; Nam Su CHO ; Sung Whan CHO ; Jong Hoon SONG
Journal of the Korean Shoulder and Elbow Society 2016;19(1):8-14
BACKGROUND: The purpose of this study was to investigate the difference between two nailing approaches of intramedullary screw fixation, the retrograde nailing versus the anterograde nailing, on the radiological and clinical outcomes in patients with clavicle shaft fractures. METHODS: From April 2002 to August 2014, we enrolled a total of 22 patients with clavicle shaft fractures to participate in this study. Twelve patients received retrograde intramedullary nailing and 10 received anterograde nailing. The average duration of follow-up was 12 months. In all the patients, we took follow-up radiographs of the anteroposterior and the axial views to assess the postoperative radiological outcomes. We measured the visual analogue scale (VAS) score, American Shoulder and Elbow Surgeons (ASES) score, and the range of motion (ROM). RESULTS: Clinically, we did not find a statistically significant difference in the retrograde group and the anterograde group in terms of the duration to bone union, the VAS score the ASES score and the ROMs. Radiologically, we found that the difference in the clavicle shortening of the affected arm and the unaffected arm did not show a statistically significant difference at the immediate postoperative assessment. we found that the difference in the clavicle shortening of the affected arm between the immediate postoperative and the final follow-up value did not show a statistically significant difference. CONCLUSIONS: We found that both the retrograde nailing and the anterograde nailing gave a favorable outcome for clavicle shaft fractures. Although we saw evidence of clavicle shortening after intramedullary screw fixation, this was not a factor that influenced clinical outcome.
Arm
;
Clavicle
;
Elbow
;
Follow-Up Studies
;
Fracture Fixation, Intramedullary
;
Humans
;
Range of Motion, Articular
;
Shoulder
10.Efficient Segmentation for Left Atrium With Convolution Neural Network Based on Active Learning in Late Gadolinium Enhancement Magnetic Resonance Imaging
Yongwon CHO ; Hyungjoon CHO ; Jaemin SHIM ; Jong-Il CHOI ; Young-Hoon KIM ; Namkug KIM ; Yu-Whan OH ; Sung Ho HWANG
Journal of Korean Medical Science 2022;37(36):e271-
Background:
To propose fully automatic segmentation of left atrium using active learning with limited dataset in late gadolinium enhancement in cardiac magnetic resonance imaging (LGE-CMRI).
Methods:
An active learning framework was developed to segment the left atrium in cardiac LGE-CMRI. Patients (n = 98) with atrial fibrillation from the Korea University Anam Hospital were enrolled. First, 20 cases were delineated for ground truths by two experts and used for training a draft model. Second, the 20 cases from the first step and 50 new cases, corrected in a human-in-the-loop manner after predicting using the draft model, were used to train the next model; all 98 cases (70 cases from the second step and 28 new cases) were trained. An additional 20 LGE-CMRI were evaluated in each step.
Results:
The Dice coefficients for the three steps were 0.85 ± 0.06, 0.89 ± 0.02, and 0.90 ± 0.02, respectively. The biases (95% confidence interval) in the Bland-Altman plots of each step were 6.36% (−14.90–27.61), 6.21% (−9.62–22.03), and 2.68% (−8.57–13.93). Deep active learning-based annotation times were 218 ± 31 seconds, 36.70 ± 18 seconds, and 36.56 ± 15 seconds, respectively.
Conclusion
Deep active learning reduced annotation time and enabled efficient training on limited LGE-CMRI.