VDT작업별 정신사회적 스트레스와 근골격계 장애에 관한 연구

백남종,강종두,주영수,배인근,권호장,박종만,조수헌,김돈규,김재용,최홍렬 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.4

It has been hypothesized that jobs that have both high psychological demands and low decision latitude("job strain") can lead to musculoskeletal disorder. The objective of this study was to test whether job strain was correlated with the presence of work-related musculoskeletal disorder, especially myofascial pain syndrome(MPS). Information on demographic factors, confounders such as household load and taking care of children or not, and scores for decision latitude, job demand, and social support was obtained by self-administered questionnaire, which had been developed in Korean language, by adopting NIOSH instrument and Extended Karasek Model(16 items). All subjects were also examined by rehabilitation medicine specialists for musculoskeletal disorders. Subjects(n=370) could be categorized into 4 groups, these were, housewives(n=89), shipyard CAD workers(n=89), general female workers(n=79; nurses, insurance counselors, public officials, clerks, etc), and telephone directory assistance operators(n=113). Results from univariate analyses indicated that all demographic factors, all confounders, scores for decision latitude and social support were not associated with the risk of musculoskeletal disorder. However, score for job demand was higher in musculoskeletal disorder cases than others. In subgroup analysis, this association was convinced again, in telephone directory assistance operators. Job strain model showed that the group of telephone directory assistance operators was high-stain group, and OR of musculo skeletal disorder was 2.446(95% C. I. : 1.174, 5.096), when comparing this with the low strain group. In conclusion, job strain is a risk factor for work-related musculoskeletal disorder.

산국 (Chrysanthemum boreale) 휘발성 추출액 및 EDTA가 미생물 및 인체 치은 섬유아세포에 미치는 영향

차정단,김태영,우원홍,전병훈,김해경,유용욱,김강주,길봉섭 원광대학교 생체재료·매식연구소 2000 원광생체재료·매식 Vol.9 No.1

Chrysanthemum boreale (C. boreale) has been used for the treatment of furuncles, carbuncles, sores, conjunctivitis, headache, vertigo and swollen throats as a folk medicine in Korea, but there is little report about experiment evidence of antimicrobial activity. To investigate the antifungal and antibacterial activity of Chrysanthemum boreale(C. boreale) volatile substance and EDTA, the growth inhibition against Aspergillus nidulans (A. nidulans), Fusarium oxysporum (F. oxysporum), Alternaria mali(Al. mali), Candida albicans (C. albicans), staphylococcus aureus (S. aureus), Streptococcus pyogenes(S. pyogenes), streptococcus mutans (S. mutans), Escherichia coli(E. coli), Helicobacter pylori (H. pylori) and Porphyromonas gingivalis (P. gingivalis) was monitored by agar dilution and broth microdilution method. The antifungal effect of C. boreale on A. nidulans, F. oxysporum, Al. mali and C. albicans was shown at the concentration of 0.04%. The antibaterial effect of C. boreale on S. aureus, S. pyogenes, S. mutans and H. pylori was shown at the concentration of 0.04%. However, the growth was inhibited at the concentration of 0.04% irrespective of the presence of EDTA 0.125% was much higher than higher than that of several concentration of volatile substance. The minimum inhibitory concentrations of volatile substance were 0.16% against S. aureus, 0.04% against S. pyogenes, 0.02% against S. mutans, 0.40% against E. coli, and 0.18% against C. albicans. The growth of human gingival fibroblasts was not affected by C. boreale volatile substances at the concentration of 0.04%. These results indicate that volatile substance from C. boreale may have biologically toxic activities to the microorganisms.

특수건강진단 자료를 이용한 소음성난청 판정기준의 비교

한상환,조수헌,주영수,하미나,윤덕로,권호장,강대희,성주헌 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.3

Although noise-induced hearing loss (NIHL) is the most prevalent occupational disease in Korea, only 10% of the diagnosed cases are compensated. Old (1989-94) and current diagnostic criteria, criteria for workers' compensation of NIHL in Korea, compensation formulas of American Medical Association/American association of Ophthalmology and Otolaryngology (AMA/AAOO), the Committee on Hearing, Bio-Acoustics, Biomechanics (CHABA), American Academy of Otolaryngology (AAO) recommendation were compared. Each criterion was applied on the audiomety data of 4044 workers (8023 ears), who had received the second line screening test of Special Periodic Health Examination Program for noise-exposed workers during 1991-2. First, the resulting proportions of NIHL cases by employing each criterion were compared and strength of agreement was measured using kappa value. Temporary Threshold Shift (TTS) was corrected by noise free interval, and the reduction ratio of NIHL cases was calculated. Theoretical progression model of NIHL was reconstructed from previous studies on the natural course of NIHL to evaluate the change of diagnosis result of each criterion in the model. The kappa value between old and current criteria was 0.19, 0.55 for current criteria and workers' com. criteria, ranging from 0.08 to 0.78, highest coincidence was observed between current criteria and CHABA formula. The current criteria produce most similar results with CHABA formula. If TTS is corrected for NFI, there is about 14% reduction of NIHL cases. The results of applying on NIHL progression model divided the formulas roughly into 3 groups, of which compensation criteria was the most, old criteria and AAO the least conservative. In conclusion, the result of 4 ㎑ audiometry should be excluded in evaluation of hearing level and a new hearing conservation program should be set out. Current diagnostic criteria has an ambiguity in that managerial concept for prevention and purpose of compensation is mixed up. The current diagnostic criteria and compensation criteria could be incorporated into a new formula which is based on the state of the art test for estimating everyday hearing disability.

VDT작업자에서 업무로 인한 정신사회적 스트레스에 대한 인지가 근골격계장애에 미치는 영향

백남종,하미나,조수헌,강대희,백도명,주영수,윤덕로,권호장 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.3

업무에 의한 정신사회적 스트레스가 근골격계 질환의 유병에 미치는 영향을 파악하기 위하여 전화안내원을 대상으로 단면적 조사연구를 수행하였다. 연구 결과 나이, 교육정도, 근무연한, 가사부담 등의 인구학적 변수는 근골격계질환의 유병에 영향을 미치지 않는 것으로 분석되었다. 정신사회적 스트레스 중 업무요구도가 높다고 느끼는 집단에서 그렇지 않은 집단에 비해 근골격계 질환의 유병률이 통계적으로 유의하게 높게 나타났으나 업무재량도나 사회적지지도는 근골격계질환과 유의한 상관관계를 발견할 수 없었다. 그러나 업무요구도는 높고 업무재량도는 낮다고 느끼는 '근무긴장도가 가장 높은 군'은 업무요구도는 낮고 업무재량도는 높다고 느끼는 '근무긴장도가 낮은 군'에 비해 근골격계 질환의 발생위험이 통계적으로 유의하게 높은 것으로 나타났다. 본 연구의 결과는 업무로 인한 정신사회적 스트레스에 대한 인지 정도에 따라 근골격계질환의 유병률이 달라짐을 시사하고 있다. 따라서 작업관련성 근골격계질환의 예방을 위해서는 기존의 인간공학적 접근 이외에 스트레스를 감소시키려는 노력이 동시에 진행되어야 할 것으로 생각한다. A cross-sectional study was conducted to assess the association between perceived occupational psychosocial stress at work and the work-related musculoskeletal disorder(WRMSD) among employees using video display terminals. The study included 111 female telecommunication employees from three companies at ChungBuk province. Cases of WRMSD were defined using symptom questionnaire and physical examination conducted by rehabilitation specialist. Information on demographics, individual factors, and perceived psychosocial stress, were obtained by self-administered questionnaire. For assessing perceived psychosocial stress, we used variables from 'job strain model' proposed by Karasek. Associations between perceived psychosocial stress and WRMSD were assessed by multiple logistic regression models. Forty nine(44% to the total) subjects met our operational definition for WRMSD. Age, seniority, housing load were not associated with WRMSD. Perceived psychosocial stress was associated with WRMSD[odds ratio=3.28, 95% confidence interval: 1.05-10.19]. This study suggests that perceived occupational psychosocial stress is related to the prevalence of WRMSD.

Effect of Alpha Lipoic Acid on In Vitro Maturation of Porcine Oocytes and Subsequent Embryonic Development after Parthenogenetic Activation

Yeong-Hun Kang,Sang-Hwan Hyun 한국동물생명공학회(구 한국동물번식학회) 2017 발생공학 국제심포지엄 및 학술대회 Vol.2017 No.10

Alpha lipoic acid (ALA) is a biological membranes compound. as the antioxidant, it decreases the oxidized forms of other antioxidant substances such as vitamin C, vitamin E and glutathione (GSH). To examine the effect of ALA on the in vitro maturation (IVM) of porcine oocytes, we investigated intracellular GSH and reactive oxygen species (ROS) levels, and subsequent embryonic development after parthenogenetic activation (PA). Intracellular GSH levels in oocytes treated with 50uM of ALA increased significantly (p<0.05) and exhibited a significant (p<0.05) decrease in intracellular ROS levels compared with the control group. Oocytes matured with 50uM during IVM displayed significantly higher cleavage rates (67.8% vs. 83.4%, respectively), and higher blastocyst formation rates and total cell number of blastocysts after PA (31.6%, 58.49 vs. 46.8%, 68.58, respectively) than the control group. In conclusion, these results suggest that treatment with ALA during IVM improves the nuclear maturation of porcine oocytes by increasing the intracellular GSH levels, thereby decreasing the intracellular ROS levels and subsequent embryonic developmental potential of PA.

포스터 발표 : Arrow-Trerotola Device를 이용한 경피적 기계적 혈전용해술과 혈관성형술로 성공적으로 치료한 혈액투석 동정맥루 폐쇄 1예

강병승 ( Kang Byeong Seung ),이태희 ( Lee Tae Hui ),이재훈 ( Lee Jae Hun ),이광훈 ( Lee Gwang Hun ),박형천 ( Park Hyeong Cheon ),강신욱 ( Kang Sin Ug ),최규헌 ( Choe Gyu Heon ),하성규 ( Ha Seong Gyu ),이호영 ( Lee Ho Yeong ),한대 대한신장학회 2003 춘계학술대회 초록집 Vol.22 No.1

일반연제 발표 : 비당뇨성 만성 사구체 신염환자에서 ACE 억제제 또는 Angiotensin 2 수용체 차단제가 사구체 선택적 투과도에 미치는 영향

강이화 ( Kang I Hwa ),김형종 ( Kim Hyeong Jong ),김범석 ( Kim Beom Seog ),김현진 ( Kim Hyeon Jin ),최훈영 ( Choe Hun Yeong ),신석균 ( Sin Seog Gyun ),강신욱 ( Kang Sin Ug ),최규헌 ( Choe Gyu Heon ),이호영 ( Lee Ho Yeong ),한대석 ( 대한신장학회 2003 춘계학술대회 초록집 Vol.22 No.1

딸기 고설재배용 전동 작업기의 교반 성능에 따른 토양 물리적 성질 변화

강대영 ( Dae Yeong Kang ),최경문 ( Gyeong Moon Choi ),강동훈 ( Dong Hun Kang ),김현태 ( Hyeon Tae Kim ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

현재 딸기 고설재배에서는 한 해의 농사가 끝난 후 다시 농사를 시작할 때 전에 사용하였던 상토를 재사용하며 유실된 상토에 한해서만 보충한다. 하지만 유실되지 않은 상토에서는 제거되지 않은 딸기의 잔뿌리와 양액으로 인해 굳은 상토가 얽혀있다. 이는 물 빠짐이 좋지 않아 생육이 불량해지는 현상이 일어난다. 잔뿌리를 제거, 굳은 상토를 파쇄를 해야할 필요가 있고, 새상토와 기존 상토를 교반해야한다. 따라서 작업기의 교반 성능에 따라 토양의 물리적 성질 변화를 분석하고자 한다. 실험에 쓰인 전동 작업기의 로터리 칼날 사양은 소재 Alloy steel, 질량 1.15 kg, 밀도 7,100 kg/m3, 중량 11.31 N이다. 고설재배 베드의 경우 텐트 천을 고려해 내향 배열법, L형이다. 전동 작업기의 속도(4 cm/s, 7 cm/s, 10 cm/s)와 로터리 칼날의 회전속도(350 rpm, 490rpm, 630 rpm)를 각각 3수준으로 설정했다. 전동 작업기의 교반 성능에 따른 토양의 물리적 성질을 판단하는 기준으로 경도, 함수율, 쇄토율로 설정하였다. 재배 및 작업 후 토양의 경도는 배드의 좌측, 중앙, 우측 순으로 평균 (0.42 Mpa, 0.81 Mpa, 0.62 Mpa), (0.17 Mpa, 0.32 Mpa, 0.19 Mpa)로 좌측은 2.5배 이상, 중앙 2.2배 이상, 우측 3.1배 이상 경도가 낮아졌다. 작업기의 속도가 느리고 로터리 회전속도가 높을수록 경도가 더 낮아졌다. 토양의 함수율의 경우 사용된 상토와 새상토의 평균 함수율은 평균 6.04 %, 51.01 %이다. 작업 후 토양의 평균 함수율은 51.89 %로 새상토보다 높게 측정되어 토양 함수율 증가에 영향을 끼쳤다고 볼 수 있다. 또한 작업 후 쇄토성은 사용된 상토의 입경별 질량과 작업 후 상토의 입경별 질량으로 비교하였다. 사용된 상토와 작업 후 상토의 입경별 질량비는 입경이 0.297mm이하인 경우 19.5%, 34.78%으로 약 15% 증가하였다.

성인 원발성 초점성 사구체 경화증의 예후인자

송영수 ( Song Yeong Su ),최훈영 ( Choe Hun Yeong ),유태현 ( Yu Tae Hyeon ),강신욱 ( Kang Sin Ug ),이중민 ( Lee Jung Min ),정현주 ( Jeong Hyeon Ju ),이호영 ( Lee Ho Yeong ),한대석 ( Han Dae Seog ),최규헌 ( Choe Gyu Heon ) 대한신장학회 2004 Kidney Research and Clinical Practice Vol.23 No.1

배 경 : 성인 원발성 초점성 분절형 사구체 경화증은 성인 신증후군의 한 원인으로 과거에는 치료에 대한 반응이 적은 것으로 생각되었으나 최근에는 치료의 관해율과 예후가 향상되고 일부 임상 및 병리 지표들은 예후 측면에서 의미가 있다고 보고되고 있다. 그러나 현재까지 일관되게 보고된 예후 인자는 없는 실정이다. 이에 저자는 치료 반응에 대한 예측인자와 신부전의 진행에 영향을 주는 위험인자를 알아보고자 하였다. 방 법 : 1991년부터 2002년까지 연세의료원에서 일차성 초점성 분절형 사구체 경화증으로 진단받은 성인 환자 40명을 대상으로 진단시 임상 및 병리조직학적 지표를 후향적으로 분석하였다. 결 과 : 신생검시 환자 26명 (65%)에서 신증후역의 단백뇨가 있었으며, 14명 (35%)에서 비신증후역의 단백뇨가 있었다. 신증후역의 단백뇨 환자군이 비신증후역의 단백뇨 환자군보다 혈청 크레아티닌치가 높았으며 (p<0.05), 혈청 알부민과 총 콜레스테롤치를 제외하고 두 군간에 기타 임상 및 병리조직학적 지표의 차이는 없었다. 27명에게 면역억제 치료를 하였으며 15명 (55.6%)에서 반응이 있었고, 치료 반응군과 무반응군 간에 임상 및 병리조직학적 지표의 차이는 없었다. 추적관찰 기간동안 정상 신기능을 유지한 군과 만성 신부전으로 진행한 군을 비교하였을 때 진단시 혈청 크레아티닌치의 증가와 치료에 대한 반응 유무가 의미있는 예후인자로 분석되었다 (p<0.05). 신 생존분석시 치료군이 치료하지 않은 군보다 생존율이 높은 경향을 보였으나 통계학적인 차이는 없었고 (p>0.05), 치료 반응군은 무반응군보다 의미있게 높은 생존율을 보였다 (P<0.05). 결 론 : 진단시 혈청 크레아티닌치의 증가 소견이 있거나 치료에 반응이 없는 환자들은 불량한 예후를 보일 수 있으므로 보다 집중적인 치료와 주기적인 신기능의 관찰이 필요할 것으로 보인다. Background : Primary focal segmental glomerulosclerosis (FSGS) is a cause of nephrotic syndrome in adult. Although primary FSGS has been known to be refractory to treatment, recent studies reveal higher remission rate and better prognosis. And it has been reported that some clinical and histopathologic paramenters are significant to prognosis. But, confirmative prognostic indices remain to be defined. In order to further clarify the prognostic factors for therapeutic response and risk factors for progression to chronic renal failure (CRF), we reviewed the medical records of primary adult FSGS patients. Methods : Forty-adult patients diagnosed as primary FSGS between 1991 to 2002 were enrolled. We retrospectively analyzed the clinical and histopathological parameters of all patinents at the time of renal biopsy. In addition, the therapeutic responses to immunosuppressants and the renal survival were analyzed. Results : At the time of renal biopsy, 26 patients (65%) had proteinuria of the nephrotic range and 14 patients (35%) had proteinuria of the non-nephrotic range. The serum creatinine level was higher in nephrotic-ranged patients than that in non nephroticranged patients (p<0.05). The other parameters were not significantly different between two groups. Twenty-seven patients were treated with immunosuppressants and 15 patients (55.6%) responded to the treatment. There was no significant difference in clinical or histopathological variables between the responders and the non-responders. High serum creatinine level at diagnosis and responsiveness to treatment appeared to be significant as risk factors for progression to CRF (p<0.05). The paticnts treated with immunosuppressants had longer survival period, compared with those without treatment. And the responders had significantly longer survival period compared with the non-responders (p<0.05). Conclusion : The patients with initial impairment of renal function or poor response to therapy may have worse prognosis, and the intense treatment with regular follow-up of renal function should be recommended for these patients. (Korean J Nephrol 2004;23(1)36-45)

일반연제 발표 : 비당뇨병성 만성 신질환 환자에서 안지오텐신 수용체 길항제의 단백뇨 감소 효과에 대한 안지오텐신 전환 효소 유전자 다형성의 영향

최훈영 ( Choe Hun Yeong ),김현진 ( Kim Hyeon Jin ),김형종 ( Kim Hyeong Jong ),김현욱 ( Kim Hyeon Ug ),장제현 ( Jang Je Hyeon ),김범석 ( Kim Beom Seog ),강신욱 ( Kang Sin Ug ),최규헌 ( Choe Gyu Heon ),이호영 ( Lee Ho Yeong ),한대석 대한신장학회 2003 춘계학술대회 초록집 Vol.22 No.1