To clarify that the psychosocial factors affect the eye strain of the VDT workers, self-reporting questionnaire about eye strain, critical flicker fusion(CFF), and 12-item version of General Health Questionnaire(GHQ) were carried out to 13 female VDT workers who have done the electronic editing and 10 female controls who were nurses in one hospital. The sum of eye symptoms of VDT workers were significantly higher than controls, but CFF of both groups were not different. And the sum of eye symptoms and CFF were not correlated. High stress group(sum of GHQ > 3) shows significantly more eye symptoms than low stress group. This result suggest that the psychosocial factors could affect the eye strain of VDT workers.
Asthenopia ; Female ; Flicker Fusion* ; Humans ; Psychology ; Word Processing ; Surveys and Questionnaires

No abstract available.
Colorectal Neoplasms* ; DNA* ; Ploidies*

Noise induced hearing loss (NIHL) is the most common occupational disease in Korea. However, there have not been reported NIHL in military workers that satisfied the decision guidelines of Korean Occupational Safety & Health Act. It is well known that aircraft maintenance workers expose to intensive noise. We found 3 military aircraft maintenance workers with NIHL that satisfied the decision guidelines of occupational disease in Korean Occupational Safety & Health Act. They were all in the base maintenance department and have work durations over 20 years. We hope these cases were sentinel events that activate the military occupational health management system.
Aircraft ; Hearing Loss* ; Hearing* ; Hope ; Humans ; Korea ; Military Personnel* ; Noise* ; Occupational Diseases* ; Occupational Health*

To study reliability and validity of PWl, this newly developed self-administered questionnaire which measures stress, was given to medial students. All respondent(133) were followed 4 weeks later and 92 were retested. Cronbach's a coefficient of data was 0.93. Test-retest reliability measured by pearson's correlation coefficient was 0.72(p<0.01l). Exploratory factor analysis(EFA) performed by principal axis factor method without iteration and by varimax rotation explored 13 principal components(eigenvalues > l). After exploring 4 factor structure according to previous study results, factor 1 showed good agreement but other factors did not. Confirmatory factor analysis(CFA) showed poor fit of 4 factor model to data. In the further study, it may be considered to model that has unidimensional factor structure.
Axis, Cervical Vertebra ; Humans ; Surveys and Questionnaires ; Reproducibility of Results*

No abstract available.
Muscular Atrophy*

This study was conducted to set up a common mechanism for varying phases of focal segmental glomerulosclerosis(FSGS) by comparing the morphological differences between human FSGS and changes in 5/6 renal ablation animal model, which has been accepted as experimental prototype for hyperfiltration theory as pathogenesis of FSGS. Both the human and the experimental rats showed very similar changes such as segmental glomerulosclerosis, vacuole formations or inclusion of small granules of podocytes, appearance of foamy cells in the capillary lumina, eosinophilic deposits along the mesangial area, and focal atrophy of tubules with associated interstitial fibrosis. The halo, frequently seen in human FSGS, is due to detachment of visceral epithelium from basement membrane, however, did not appear in the experimental rat specimen. On the other hand, the foamy cells and hyalinization were more frequently noted in the rat series and even involved the arterioles. The mesangial proliferation never appeared in the rat series occasionally found in human FSGS. In conclusion, the pathogenesis of FSGS cannot depend solely on the hyperfiltration theory of hemodynamic derangement, but has complex impairment of visceral epithelium and cells forming the constituents of basement membrane.
Animals ; Arterioles ; Atrophy ; Basement Membrane ; Biopsy ; Capillaries ; Eosinophils ; Epithelium ; Fibrosis ; Hand ; Hemodynamics ; Humans* ; Hyalin ; Models, Animal* ; Nephrectomy* ; Podocytes ; Rats* ; Vacuoles

This study was conducted to set up a common mechanism for varying phases of focal segmental glomerulosclerosis(FSGS) by comparing the morphological differences between human FSGS and changes in 5/6 renal ablation animal model, which has been accepted as experimental prototype for hyperfiltration theory as pathogenesis of FSGS. Both the human and the experimental rats showed very similar changes such as segmental glomerulosclerosis, vacuole formations or inclusion of small granules of podocytes, appearance of foamy cells in the capillary lumina, eosinophilic deposits along the mesangial area, and focal atrophy of tubules with associated interstitial fibrosis. The halo, frequently seen in human FSGS, is due to detachment of visceral epithelium from basement membrane, however, did not appear in the experimental rat specimen. On the other hand, the foamy cells and hyalinization were more frequently noted in the rat series and even involved the arterioles. The mesangial proliferation never appeared in the rat series occasionally found in human FSGS. In conclusion, the pathogenesis of FSGS cannot depend solely on the hyperfiltration theory of hemodynamic derangement, but has complex impairment of visceral epithelium and cells forming the constituents of basement membrane.
Animals ; Arterioles ; Atrophy ; Basement Membrane ; Biopsy ; Capillaries ; Eosinophils ; Epithelium ; Fibrosis ; Hand ; Hemodynamics ; Humans* ; Hyalin ; Models, Animal* ; Nephrectomy* ; Podocytes ; Rats* ; Vacuoles

Undifferentiated sarcoma of the liver is a highly malignant neoplasm that occurs almost exclusively in children. We present a case of adult undifferentiated sarcoma in a 33-year-old man. The neoplasm was typically hypovascular on hepatic angiography and a globular, cystic and mucoid mass separated from the adjacent liver by a psedocapsule was removed from the left lobe of the liver. Necrosis and hemorrhage were found. Microscopically the neoplasm consisted of myxoid and cellular areas and the basic neoplastic cells were stellate cells showing variable degree of anaplasia and pleomorphism. Eosinophilic globules were PAS-positive and immunohistochemically negative for alpha-fetoprotein. Extramedullary hematopoiesis was present and normal-appearing bile ducts and hepatic cell cords were noted.
Child ; Adult ; Male ; Female ; Humans

BACKGROUND: In an effort to improve the diagnostic accuracy of the exercise electrocardiography (ECG) to detect coronary artery disease, exercise-induced changes in Q, R and S wave amplitudes has been evaluated in conjunction with or without ST segment changes. We measured the exercise-induced changes in Q, R and S wave amplitudes, and calculated the Athens QRS score to assess its diagnostic value. MATERIALS AND METHOD: Fifty patients who underwent the exercise test and MIBI myocardial scan and were proved to have coronary artery diameter stenosis > or =50% in coronary angiography were included in the patient group. Data of forty-nine persons showing negative findings in the exercise test and MIBI scan were used as control. The exercise test was performed according to the modified Bruce protocol using Marquette case 16. Exercise ECG was positive in 58% (29/50) of the patient group. The Q, R and S wave amplitudes at peak exercise were subtracted from the values of standing position at rest to obtain Athens QRS score. RESULTS: The mean age of patients and control were 54.5+/-9.4 years and 49.8+/-11.4 years respectively (p=NS), and their exercise capacity was 8.5+/-3.1 mets and 9.8+/-1.9 mets respectively (p=NS). The values of delta(R-Q-S)V5 + delta(R-Q-S)aVF and delta(R-Q-S)aVF were significantly lower in patients than the control (0.85+/-6.60 mm vs 3.72+/-5.09 mm, p=0.017, -0.60+/-4.76 mm vs 1.00+/-2.72 mm, p=0.030), and the values of deltaQV5 and deltaSaVF were significantly higher in patients than the control (-0.045+/-0.65 mm vs -0.41+/-0.78 mm, p=0.012, -0.84+/-1.90 mm vs -1.62+/-1.60 mm, p=0.009). However, the values were too widely overlaped between the patients and the control to give diagnostic cutoff points. CONCLUSION: It seems that exercise QRS scores do not have additive diagnostic value for coronary artery disease.
Constriction, Pathologic ; Coronary Angiography ; Coronary Artery Disease* ; Coronary Vessels* ; Electrocardiography ; Exercise Test ; Humans

No abstract available.
Spine* ; Zygapophyseal Joint*