치과위생사의 감염관리 실태에 관한 연구

조윤정,윤석준,안형식,김순덕,박형근 한국의료QA학회 2003 한국의료질향상학회지 Vol.10 No.2

Background : Dental hygienists are at risk of acquiring infections through exposure to infectious agents. This study explores the frequency of exposure to infectious agents and infection control practices among dental hygienists. Methods : We undertook a cross-sectional survey to examine the exposure to infectious agents and infection control practices among dental hygienists through questionnaire. Data were obtained from 124 dental hygienists attending educational conferences. A multiple logistic regression analysis was conducted to determine the factors that effect infection control practices in to age, completion of infection control education, recognition of their own serum hepatitis Ag/Ab status, the number of one day patients, location of clinics, type of clinics, and career years. Results : Of the 124 dental hygienists, 91.7% were exposed to at least one accident such as needle strike injuries during their practices periods. The health screening coverage rate in dental hygienists was 16.5%. The number of one day patients and career years were important in relation to infection control practices among dental hygienists. The adjusted odds ratio estimates for career years were 5.049 times greater(95% CI 1.238-20.597)for groups with 4 career years than under 2 career years. That for the number of one day patients were 0.261(95% CI 0.071-0.0955)lower for through 20 up to 30 patients, 0.531(95% CI 0.102-2.78)lower for through 30 up to 40 patients and 0.498(95% CI 0.123-2.017)lower for more than 40 patients than under 20 patients. Conclusion : From these results, prevalence of infection control practices among dental hygienists is related to the number of one day patients and career years. Prevention of cross infection and reduction of future transmission should be a priority to dental hygienists for promotion of infection control and further efforts to educate newcomers on infection prevention should be made.

Cyclosporin A에 의한 비만세포 고사(apoptosis)

노환중,장형준,조규섭,김유선,유영현,전경명 대한이비인후과학회 2001 대한이비인후과학회지 두경부외과학 Vol.44 No.12

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

Postoperative Pulmonary Function Change is Dependent on Preoperative RV/TLC in Patients Underwent Curative Lobectomy

( Hyeong Jun Cho ),( Chang Dong Yeo ),( Hwa Young Lee ),( Hye Seon Kang ),( Chan Kwon Park ),( Sung Kyung Kim ),( Ju Sang Kim ),( Jin Woo Kim ),( Seung Joon Kim ),( Sang Haak Lee ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-

Background Prediction of postoperative lung function for lung cancer is crucial to predicting perioperative risk assessment and postoperative quality of life. The objective of this study was to identify other indicators than conventional formular in predicting postoperative lung function after lung resection for lung cancer. Methods We enrolled lung cancer patients who underwent curative lobectomy and performed pulmonary function test for lung cancer at seven hospital at The Catholic University of Korea from 2017 to 2019. Postoperative (ppo) 6 and 12 months forced expiratory volume 1 (FEV1) were compared with predicted ppo FEV1 using the convention formula as follows: ppo FEV1= preoperative FEV1 x (residual segment number/total segment number). Clinical characteristics were compared between ppo FEV1 increase and decrease groups compared with predicted FEV1 values. Results A total of 263 patients were analyzed in this study. Among 214 patients performed lung function after 6 months surgery, 69 (32.2%) and 145 (67.8%) patients were classified into ppo FEV1 increase and decrease group compared with predicted FEV1 values. In ppo FEV1 increase group, median ages were younger (65 vs 69 years old, p=0.01). This group showed higher predominance of both upper lobe cancer (67.2% vs 52.8%, p< 0.05), in addition, higher proportion of preoperative residual volume(RV)/total lung capacity(TLC) ratio >40% (79.5% vs 59.3%, p=0.01), significantly. Of 153 patients performed lung function after 12 months surgery, there were no significant clinical factors between two groups. In the multivariate analysis, preoperative RV/TLC ≥40% (HR, 2.87; 95% CI, 1.10-7.43; p=0.03) was significantly associated with ppo FEV1 increase compared with predicted values. Conclusions Preoperative RV/TLC >40% was an independent predictive factor for reserved lung function in patients who underwent curative lobectomy. Moreover, upper lobectomy and young age were also associated with postoperative FEV1 increase compared with predicted values.

Pasteuria penetrans endospore attachment on root-knot nematode juveniles affected by temperature and nematicides treatments

Cho, Myoung Rae,Taek Jun Kang,Hyeong Hwan Kim,Jae-A Jung,Chang Yul Yang,Heung Yong Jeon,Dong Ro Choi,D. W. Dickson 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05

This study was conducted to evaluate the effects of temperature and nematicides on endospore attachment characteristics of 2 Korean isolates of nematodeparasitic bacteria, Pasteuria penetrans. P. penetrans CJ-1 and 98-35 isolates and 3 species of root-knot nematodes in U. of Florida were used ; Meloidogyne incognita (MI), M. arenaria (MA), and M. javanica (MJ). Three nematicide levels of 2, 4, and 6 ppm were compared by treating Vydate and Nemacur in the endospore containing soils. The endospores were attached to the root-knot nematode juveniles by centrifugal method. Reproduction of the isolates was checked by observing root-knot nematode females harvested from inoculated tomato roots. 1. Among the two Korean isolates, 98-35 showed attachments to MI, MA, and MJ juveniles, but it could not reproduce in any species. CJ-1 reproduced on all the 3 tested root-knot nematode species. 2. Endospores pretreated in -14°C showed higher attachment rate than those pretreated in 4, 24, and 40℃. 3. Nemacur treatments significantly suppressed the attachment of the endospores to the juveniles, while Vydate treatment effects were negligible.

Efficient Data Management in RFID Applications

Cho, Yong-Jun,Bok, Kyoung-Soo,Park, Yong-Hun,Park, Hyeong-Soon,Park, Jun-Ho,Kang, Tae-Ho,Kim, Hak-Yong,Yoo, Jae-Soo The Korea Contents Association 2009 International Journal of Contents Vol.5 No.1

Logistics is in the limelight as one of a variety of RFID applications. The RFID technology is actively being applied to improve the competitiveness power of companies through the synthetic management of products and information. The RFID system generates large volume of stream data. It has problems which occur waste of storage and long processing time when storing large data and processing queries. Recently, many studies have been done to solve the problems which are generated in RFID system. In this thesis, we propose an efficient data management scheme for path queries and containment queries which are occurred frequently. The proposed data management scheme considers a change of the containment of products during a transport and supports a path of changed products by representing a path of various containments. Also, the compression utilizing the structure of supply chain reduces the stored data volumes. In order to show the superiority of our approach, we compare it with the existing schemes. As a result, our experimental results show that our scheme outperforms the existing scheme in terms of storage efficiency and query processing time.

A Case of Polyarteritis Nodosa Involving the Breasts

( Jun Hyeong Cho ),( Jeongmin Hong ),( Wonyong Jo ),( Yun-hong Cheon ),( Hyun-ok Kim ),( Sang-il Lee ),( Young Sun Suh ) 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.1

Polyarteritis nodosa (PAN) is a necrotizing vasculitis of small- and medium-sized arteries affecting multiple organ systems. Generally, multi-organ involvement is more common than isolated organ involvement in classic PAN. A localized PAN involving breasts alone has rarely been reported. We describe an unusual case of a 72-year-old woman with a localized form of PAN manifested by acute onset of breast pain with fever. Ultrasonography of breasts showed increased echogenicity of subcutaneous fat tissue surrounding the arteries with wall thickening in both upper breasts. Excisional biopsy of left breast revealed leukocytoclastic small to medium-sized arteritis without giant cell infiltration, indicating PAN. Other imaging studies showed that there were no visceral organ involvements. We diagnosed a localized PAN involving breasts, and initiated corticosteroid and methotrexate. She rapidly responded to the treatment and has remained in clinical remission for 1 year.

The Applicability of Estimated Plasma Volume Status as a Predictor of Mortality in Patients with Sepsis

( Hyeong Jun Cho ),( Jongmin Lee ),( Seok Chan Kim ),( Na Ri Jeong ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-

Background Sepsis is associated with endothelial dysfunction and alteration of capillary permeability. The objective of this study was to evaluate the prognostic value of estimated plasma volume status (ePVS) in patients with sepsis or septic shock who were admitted intensive care unit (ICU). Methods In this single-center, prospective study, 100 patients with sepsis or septic shock who were admitted ICU were enrolled. The primary outcome was in-hospital mortality and multivariable logistic regression analysis was used to adjust for confounding factors. Results The in-hospital mortality was 47%. The mean ePVS in patients who died was higher than in those who survived (7.7 ± 2.1 dL/g vs. 6.6 ± 1.6 dL/g, p= 0.003). To evaluate the utility of ePVS in predicting in-hospital mortality, a receiver operating characteristic curve was produced. Sensitivity and specificity were optimal at a cut-off point of 7.09 dL/g, with an area under the curve of 0.655. In the multivariate analysis, higher ePVS was significantly associated with higher in-hospital mortality (HR, 1.39; 95% CI, 1.04 - 1.85, p = 0.028). The Kaplan-Meier curved showed that an ePVS value above 7.09 is assocaited with an increased risk of in-hospital mortality compared to the rest of the population (log-rank test p = 0.004). Conclusions The ePVS value is expected to be useful for patients with sepsis or septic shock who were admitted in ICU, as a predictor of mortality.

S-130 Tenofovir versus Entecavir in Chronic hepatitis B Patients

( Hyeong Jun Cho ),( Jung Hyun Kwon ),( Young Woon Kim ),( Hae Lim Lee ),( Sung Won Lee ),( Jeong Won Jang ),( Soon Woo Nam ),( Nam Ik Han ),( Kyu Won Chung ) 대한내과학회 2016 대한내과학회 추계학술대회 Vol.2016 No.1

Background: Current guidelines suggest entecavir (ETV) and tenofovir (TDF) as the first line treatment of chronic hepatitis B. We evaluated the antiviral response of the two agents in real clinical practice. Methods: A consecutive cohort study was performed. 754 treatment naive patients were enrolled and 579 patients (entecavir n=312, tenofovir n=267) tested for HBV DNA RT PCR at 24 weeks post-treatment were analyzed. Quantitative serum levels of HBsAg, HBeAg, HBV DNA were serially assessed. Virological response (VR, <20 IU/mL) was evaluated. Results: VR at weeks 12, 24, 48, 72, 96 in the ETV group were 23.3% (58/249), 48.0% (143/298), 67.0% (187/279), 76.2% (154/202), 82.3% (172/209) compared to 30.5% (60/197), 67.2% (156/232), 82.4% (155/188), 94.6% (87/92), 100% (37/37) in the TDF group, respectively. TDF achieved higher VR but the baseline HBV DNA levels were lower in the TDF group compared with the ETV group. There was no difference in the HBV DBA reduction rates between the two groups with 5.73±1.28 (log10 IU/mL) decrease in the ETV group compared to 5.77±1.50 in the TDF group at week 96 (p>0.05). HBeAg loss at week 72 was observed in 22.1% (32/145) in the ETV group compared to 29.5% (13/44) in the TDF group (p>0.05). HBeAg seroconversion was achieved in 2.8% (4/145) in the ETV group compared to 6.8% (3/44) in the TDF group at week 72 (p>0.05). The relatively higher rate of serologic response in the TDF group may be related to the lower baseline quantitative HBeAg titer in the TDF group. There was no difference in the quantitative HBeAg and HBsAg titer reduction rates between the two groups. Conclusions: Both TDF and ETV showed prominent virologic response after 96 weeks therapy. During the 96 weeks, no difference was noted in the reduction rates of quantitative HBsAg and HBeAg titers between TDF and ETV. Superior tendency was observed in the TDF group in achieving serologic response but as this study was carried out within real life clinical settings, small number of patients were followed up for more than 72 weeks in the TDF group. Therefore, long term follow up is required in future large-scale studies to accurately assess the efficacy of the two drugs.

시뮬레이션을 이용한 석면 해체공사의 최적화 공정계획 모델

조형준 ( Cho Hyeong-jun ),노재윤 ( Noh Jae-yun ),이호현 ( Lee Ho-hyeon ),이수민 ( Lee Su-min ),한승우 ( Han Seung-woo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.2

In Korea, asbestos removal has been actively carried out nationwide since 2015 when asbestos was completely banned as a first-class carcinogen. Since scattering dust generated in the process of removing asbestos causes fatal diseases such as asbestos lung disease and lung cancer, concerns are growing over the safety of construction workers and building users undergoing dismantling. For this reason, regulations on asbestos sites have been strengthened and prior studies on safety and risk assessment have been conducted, but research on actual site data collection and process planning is insufficient even though safety is reduced due to delay in site construction period. Therefore, it is necessary to analyze the work and delay factors of the asbestos dismantling process and develop an optimized process plan model for workers. This study is an initial step to develop an optimized process plan model that considers the safety and productivity of asbestos dismantling work, and aims to help establish an optimized process plan for asbestos dismantling process using website clone simulation.