Annals of Occupational and Environmental Medicine

Hyeon Kyeong Lee

2 Articles

Study on the Pre-employment Lumbo-sacral Simple X-Ray Examination: Hyun Sul Lim, Soo Keun Kim, Duck Soo Kim, Hyeon Kyeong Lee, Dae Seob Choi; Korean Journal of Occupational and Environmental Medicine 2000;12(2):218-226. Published online June 30, 2000; DOI: https://doi.org/10.35371/kjoem.2000.12.2.218

Abstract PDF: OBJECTIVES
A study was conducted for investigating the status of simple X-rays on lumbosacral regions at pre-employment health examination and analysing the effectiveness of simple X-rays on lumbosacral regions.
METHODS
The study data were pre-employment health examination data in a university hospital from Jan 3, 1993 through October of 1997. And, 97 newly employed workers who claimed no low back pain at pre-employment health examination of a certain company were follow-up survey about low back pain and related factors in April, 1995 and October of 1997. The data were collected by a self-reported questionnaire and a medical examination with a rehabilitation specialist.
RESULTS
Taking the simple X-rays on lumbo-sacral regions was 1, 591 workers(10.5%) among 15,166 pre-employment health examination from Jan 3, 1993 through October of 1997. And yearly application rates of these X-ray tests have been significantly statistical increasing (p<0.01). 2. The abnormal findings of simple X-rays on lumbo-sacral regions at pre-employment health examination were 40 workers. But, there was not significantly statistical difference between normal and abnormal group for the complaint rate of low back pain. 3. The number of case with symptoms of low back pain at the follow-up survey were 46, so the incidence density was 37. 1 persons/ 100 person-years. And the incidence density was not significantly statistical difference between normal and abnormal group of simple X-rays on lumbo-sacral regions. 4. Through the multivariate logistic regression, significantly associated factors with low back pain were found to be tenure(OR=0.36, 95%CI: 0.17-0.79), lifting of heavy materials(OR=5. 86, 95%CI: l. 58-21. 74).
CONCLUSION
The simple X-rays on lumbo-sacral regions at pre-employment health examination is required further research for utilizing pre-employment health examination according to above results.

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A Study on the Change of the Bone Density among Workers Exposed to Hydrofluoric Acid: Ji Yong Kim, Hyun Sul Lim, Hoe Kyeong Cheong, Hyeon Kyeong Lee, Heung Sik Kang; Korean Journal of Occupational and Environmental Medicine 1995;7(1):120-127. Published online February 28, 1995; DOI: https://doi.org/10.35371/kjoem.1995.7.1.120

Hydrofluoric acid is one of the strongest irritating, corrosive and poisonous inorganic chemicals. The most significant chronic consequence of excessive fluoride exposure is the disorder of skeletal system and connective tissue. The first stage of osteofluorosis consists of an increase in the density of flatbone such as pelvic bone and vertebral bones, with coarseness and blurring of bone trabecular. Therefore we wanted to observe the change of the bone density among workers exposed to hydrofluoric acid. Questionnaires and radiological investigations were performed for 39 hydrofluoric acid manufacturing factory worker sexposed to hydrofluoric acid. And then authors checked urinary fluoride level by fluoride ion method. the radiographs were doubly read by two radiologists for reliability. The results were as follows; 1. There was a significant difference in urinary fluoride level (p<0.01), but not in age, in tenure(p>0.05) among workers by the job title. 2. By the two radiologists, eight cases were read as bone fluorosis. The prevalence rate of bone fluorosis was 20.5%. 3. There was not a significant difference in general characteristic such as age, tenure and in muculoskeletal signs and symptoms between the fluorosis group and the normal group. 4. However, a close relationship between the occurence of the change of bone density and the degree of fluorde exposure such as burn was found. The difficulties in diagnosing fluorosis result from the questionable sensitively of x-ray techniques and from the non-specific associated signs and symptoms. A quantitative method such as densitometry to assessosteosclerosis and bone structure alteration and a follow-up study are needed.

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Health Care Plan for Hydrogen Fluoride Spill, Gumi, Korea
Hyun-Sul Lim, Kwan Lee
Journal of Korean Medical Science.2012; 27(11): 1283. CrossRef

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