No abstract available.

No abstract available.
Arthroplasty* ; Knee*

No abstract available.

To investigate the effectiveness of the interventions in working environment and personal hygiene for the occupational exposure to the lead, the blood zinc protoporphyrin(ZPP) concentrations of 131 workers ( 100 exposed subjects and 31 controls ) of a newly established battery factory were analyzed. They were measured in every 3 months up to 18 months. Air lead concentration (Pb-A) of the workplaces was also checked for 3 times in 6 months interval from August 1987. Environmental intervention included the local exhaust ventilation and vacuum cleaning of the floor. Intervention of the personal hygiene included the daily change of clothes, compulsory shower after work and hand washing before meal, prohibition of cigarette smoking and food consumption at the work site and wearing mask. Mean blood ZPP concentration of the controls was 16.45+/-4.83 microgram/dashliter at the preemployment examination and slightly increased to 17.77+/-5.59 microgram/dashliter after 6 months. Mean blood ZPP concentration of the exposed subjects who were employed before the factory was in operation (Group A) was 17.36+/-5.20 microgram/dashliter on employment and it was increased to 23.00+/-13.06 microgram/dashliter after 3 months. The blood ZPP concentration was increased to 27.25+/-6.40 microgram/dashliter on 6 months (p<0.01) after the employment which was 1 month after the initiation of intervention program. It did not increase thereafter and ranged between 25.48 microgram/dashliter and 26.61 microgram/dashliter in the subsequent 4 results. Mean blood ZPP concentration of the exposed subjects who were employed after the factory had been in operation but before the intervention program was initiated (Group B) was 14.34+/-6.10 microgram/dashliter on employment and it was increased to 28.97+/-7.14 microgram/dashliter (p<0.01) in 3 months later(1 month after the intervention). The values of subsequent 4 tests were maintained between 26.96 microgram/dashliter and 27.96 microgram/dashliter. Mean blood ZPP concentration of the exposed subjects who were employed after intervention program had been started (Group C) was 21.34+/-5.25 microgram/dashliter on employment and it was gradually increased to 23.37+/-3.86 microgram/dashliter (p<0.01) after 3 months, 23.93+/-3.64 microgram/dashliter after 6 months, 25.50+/-3.01 microgram/dashliter (p<0.01) after 9 months, and 25.50+/-3.10 microgram/dashliter after 12 months. Workplaces were classified into 4 parts according to Pb-A. The Pb-A of part I, the highest areas, were 0.365 microgram/m4, and after the intervention the levels were decreased to 0.216 microgram/m4 and 0.208 microgram/m4 in follow-up test. The Pb-A of part II which was resulted in lower value than part I was decreased from 0.232 microgram/m4 to 0.148 microgram/m4, and 0.120 microgram/m4 after the intervention. The Pb-A of part III was tested after the intervention and resulted in 0.124 microgram/m4 in January 1988 and 0.081 microgram/m4 in August 1988. The Pb-A of part IV was also tested after the intervention and resulted in 0.110 microgram/m4 in August 1988. There was no consistent relationship between Pb-A and blood ZPP concentration. The blood ZPP concentration of the group A and B workers in the part of the highest Pb-A were lower than those of the workers in the parts of lower Pb-A. The blood ZPP concentration of the workers in the part of the lowest Pb-A increased more rapidly. The blood ZPP concentration of the group C workers was the highest in part III. These findings suggest that the intervention in personal hygiene is more effective than environmental intervention, and it should be carried out from the first day of employment and to both the exposed subjects, blue color workers and the controls, white color workers.
Cohort Studies* ; Employment ; Follow-Up Studies ; Hand Disinfection ; Humans ; Hygiene ; Masks ; Meals ; Occupational Exposure ; Smoking ; Vacuum ; Ventilation ; Workplace ; Zinc*

An experimental study was performed to investigate. The subjects drank 0.5g/kg ethanol and performed 7 items of SPES(simple reaction time, color word stress, digit classification, finger tapping speed, numerical ability, symbol digit coding, memory digit span). 20 students of medical college participated in the study during August, 1996. After ethanol intake, performance of 4 items(simple reaction time, digit classification, finger tapping speed, symbol digit coding) significantly showed to be decreased. The function of perception - response speed and steady movement were found to be more sensitive to ethanol than that of short - term memory, numerical ability and specification of color. No significant association were found between smoking, alcohol drinking, BMI(body mass index) and the effects of ethanol on neurobehavioral performance.

PURPOSE: Algorithms to get cross-sectional bone density pattern(transverse histogram) to predict the loosening of hip prosthesis using DXA(Dual X-ray Absorptiometry) have been developed. We performed this study to analyze the correlation between radiologic findings and densitometric pattern of the THRA(Total Hip Replacement Arthroplasty) patients. MATERIALS AND METHODS: Thirty-six hips of 32 THRA patients were evaluated. The duration between THRA and DXA was from 1 year 7 months to 15 years. On transverse histogram, the periprosthetic bone density patterns were classified as 3 types;type I, rigid fixation in 17, type II, definite loosening in 8, and type III, partial loosening in 11 cases. Surgical findings, plain X-ray findnings and transverse histogram using DXA were correlated. RESULTS: Among 14 cases performing revision for acetabular prosthesis loosening, 5 cases revealed loosening of fernoral stems while 9 cases revealed rigid fixation of femoral stems. Sensitivity was 100% for either plain X-ray or DXA. Specificity was 88%, 77% for plain X-ray and DXA respectively. CONCLUSION: This preliminary study reveals that periprosthetic bone density pattern on transverse histogram on DXA may be useful in the evaluation of the loosening. However, further study will be needed for clinical application.
Acetabulum ; Arthroplasty, Replacement, Hip* ; Bone Density ; Hip ; Hip Prosthesis ; Humans ; Prosthesis Failure ; Sensitivity and Specificity

Synovial Sarcoma is a very rare and highly malignant tumor. It is prevalent near the joints. Its peak incidence is from 3 rd to 6 th decade. It occurs almost at the upper and lower extremities and is also called as Sarcomesothelioma, Synovial Endothelioma, Malignant Synovioma and Synovioma. Three cases of Synovial Sarcoma which was treated at the department of Orthopedic Surgery, Seoul Red Cross Hosp. from 1968 to 1977 was reported.
Incidence ; Joints ; Lower Extremity ; Orthopedics ; Red Cross ; Sarcoma, Synovial ; Seoul

Cnical analysis of pyogenic hip in children was made on 18 patients, who had been admitted in the dept. of orthopedic surgery, Seoul Red Cross Hospital from Jan. 1972 to Dec. 1976. The following results were obtained: 1. The incidence of the pyogenic hip was slightly higher in male than female as 11 versus 7 and it was higher in the age group of 5~7 years and 11~13 years. 2. The most of the etiological microorganism was coagulase positive stap hylococcus aureus. 3. Penicillin was resistant to staphylococcus aureus in about 75% of cases, and orbenin and Lincocin were most sensitive in 58.2% of cases. 4. All cases treated with arthrotomy and irigation or drainage, but prognosis was different by method of surgical approach and method of treatment. 5 In reference with progoosis early hospitalization, early diagnosis and early treatment were counted to be imperative as known.
Child ; Coagulase ; Drainage ; Early Diagnosis ; Female ; Hip ; Hospitalization ; Humans ; Incidence ; Lincomycin ; Male ; Methods ; Orthopedics ; Penicillins ; Prognosis ; Red Cross ; Seoul ; Staphylococcus aureus

The aim of this study was to analyze the process of restoration of muscle power following arthroscopic primary repair of ACL with manual test and Cybex test for one year postoperatively. Arthroscopic primary repair of the ACL was performed in 24 fresh tear. Postoperatively a limited motion brace was applied. Full weight bearing was allowed at 10 weeks postoperatively. In all cases mid-thigh circumference at 7.5 cm proximal to the upper pole of patella was measured. Manual muscle power test and Cybex test were also performed and the differences between the normal and the affected legs were recorded. The manual test and measurement of mid-thigh circumference were performed at 6 weeks, 12 weeks, 6 months and 1 year postoperatively. All cases showed 'normal' muscle power at 6 weeks after surgery in manual test. The mean difference of mid-thigh circumference was 4.5 cm(range 2.0-6.0 cm) at 6 weeks, 3.6 cm(range 1.0-6.5 cm) at 12 weeks, 2.9 cm(range 1.8-4.8 cm) at 6 months and 0.9 cm(0.5-2.5 cm) at 1 year after surgery. The peak torque deficit measured by Cybex test showed 50-82%(average 65.8%) in extensor and 24-96 %(average 60.6 %) in flexor at 12 weeks, 21-60 %(average 41.4 %) in extensor and 2-50 %(average 32.4 %) in flexor at 6 months, 1-23 %(average 13.1 %) in extensor and 1-19 %(average 11.4 %) in flexor at 1 year after surgery. From these results it would be suggested that the peak torque of muscles was not normal by Cybex test although the muscle power was restored clinically by 1 year following surgery.
Braces ; Leg ; Muscles ; Patella ; Tears ; Torque ; Weight-Bearing

Aim. A neurobehavioral test for workers exposed to organic solvents in the workplace can be affected by many factors : age, education, motivation, ethnicity, etc. To apply more suitable neurobehavioral test for Korean workers, we evaluated the validity of several items of computerized and traditional neurobehavioral tests. Methods. We have applied eleven tests : four items of computerized neurobehavioral test(Swedish Performance Evaluation System) including Addition, Symbol-Digit, Digit Span, and Finger tapping speed, and seven items of traditional neurobehavioral test consisting of Addition, Digit-Symbol , Digit Span, Benton visual retention test, Pursuit aiming, Pegboard, and Tapping. These tests were performed on 96 workers exposed to solvents, and 100 reference workers. The concurrent and construct validities were evaluated by group difference, correlation with age, educational level, hippuric acid level, neurotoxic symptom, current exposure level, multitrait-multimethod matrix, factor analysis, and discriminant analysis. Results. Statistically significant differences were observed between the workers exposed to solvents and referents in computerized Symbol-Digit, Finger tapping speed, traditional Digit-Symbol and Pegboard. The computerized Symbol-Digit, traditional Digit-Symbol, Addition, Benton visual retention test, and Pegboard were found to be related to the age. The performance of computerized Symbol-Digit, Addition, and traditional Digit-Symbol were found to be related to the educational level significantly. The computerized Symbol-Digit, Finger tapping speed, and traditional Digit-Symbol were found to be related to hippuric acid, and neurotoxic symptom. The discriminability of Finger tapping speed, and Pegboard was better than the other tests. In discriminant analysis, the model with two variables, the computerized Symbol-Digit and Pegboard, classified almost 70 percent of the workers correctly. Conclusions. These results suggest that the computerized Symbol-Digit, Finger tapping speed, and Pegboard are more satisfactory for our purpose, and the Addition, Tapping, Benton visual retention test, and Pursuit aiming are less valid than other items. These may allow the reasonable selection of core neurobehavioral tests for workers exposed to solvents in Korea.
Education ; Fingers ; Korea ; Motivation ; Solvents