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Jung YS, Kim YE, Ock M, Yoon SJ. The gaps in health-adjusted life Expectancy (HALE) by income and region in Korea. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac131.531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
This study aims to calculate the health-adjusted life expectancy (HALE) by using years lived with disability (YLD) from the national claims data, as well as to identify the differences and inequalities in sex, income level and region. The study was carried out on total population receiving national health insurance and medical benefits. We calculated incidence-based YLD for 260 disease groups, and used it as the number of healthy years lost to calculate HALE. We adopted the insurance premium to calculate the income as a proxy indicator. For the region classification, we chose 250 Korean municipal-level administrative districts. The primary outcome was HALE in the Korean population. The second outcome was the HALE’s gap in terms of sex, income, and region. Our results revealed that HALE increased from 2008 (68.89 years) to 2019 (70.58 years). HALE in males increased faster than that in females. HALE was higher in higher income levels. In 2019, the gap in HALE between Q1 and Q2, the lower income group, was about 5.70 years. The gap in females by income level was smaller than that in males. Moreover, the gap in HALE by region was found to increase. Results suggest that there is an inequality in YLD in terms of income level in Korea. Therefore, we need intensive management for the low-income group to increase HALE at the national level.
Key messages
• Males’ health level may be more sensitive to the socioeconomic level than females’ health level.
• In the 5th National Health Plan (HP2030), it was decided to set a target value for the overall goals based on this result.
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Affiliation(s)
- YS Jung
- Institute for Future Public Health, Korea University , Seoul, South Korea
| | - YE Kim
- Department of Big Data Strategy, National Health Insurance Service , Wonju, South Korea
| | - M Ock
- Department of Preventive Medicine, University of Ulsan College of Medicine , Ulsan, South Korea
| | - SJ Yoon
- Department of Preventive Medicine, Korea University College of Medicine , Seoul, South Korea
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Kim YE, Cho Y, Jo SJ. Risk of de novo psoriasis in hypertension patients initially treated with beta-blockers: Nationwide population-based cohort study in Korea. J Eur Acad Dermatol Venereol 2021; 36:e202-e205. [PMID: 34626505 DOI: 10.1111/jdv.17733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 09/02/2021] [Accepted: 09/27/2021] [Indexed: 11/30/2022]
Affiliation(s)
- Y E Kim
- Department of Dermatology, Seoul National University College of Medicine, Seoul, South Korea
| | - Y Cho
- Division of Cardiology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - S J Jo
- Department of Dermatology, Seoul National University College of Medicine, Seoul, South Korea
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Cho SI, Kim YE, Jo SJ. Association of COVID-19 with skin diseases and relevant biologics: a cross-sectional study using nationwide claim data in South Korea. Br J Dermatol 2020; 184:296-303. [PMID: 32875557 PMCID: PMC9213995 DOI: 10.1111/bjd.19507] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/27/2020] [Accepted: 08/27/2020] [Indexed: 02/06/2023]
Abstract
Background As the coronavirus disease 2019 (COVID‐19) pandemic has spread, information about COVID‐19 and skin disease or related biologics is still lacking. Objectives To identify the association between COVID‐19 and skin diseases or biologics. Methods A nationwide claim dataset relevant to COVID‐19 in South Korea was analysed. This dataset included insurance claim data before and during COVID‐19 treatment and clinical outcomes. Claim data related to skin diseases and relevant biologics were analysed to determine the association of COVID‐19 with skin diseases and relevant biologics. Results The dataset contained a total of 234 427 individuals (111 947 male and 122 480 female) who underwent COVID‐19 testing. Of them, 7590 (3·2%) were confirmed as having COVID‐19, and 227 (3·0%) confirmed patients died. Among various skin diseases and biologics, no significant increase in the presence of specific skin diseases or exposure to biologics was observed in the COVID‐19‐positive group, even after adjusting for or matching covariates. The presence of skin diseases and exposure to biologics also did not seem to affect clinical outcomes including mortality. Conclusions Underlying skin diseases did not appear to increase susceptibility to COVID‐19 or mortality from COVID‐19. Considering the risks and benefits, biologics for dermatological conditions might be continuously used during the COVID‐19 pandemic.
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Affiliation(s)
- S I Cho
- Department of Dermatology, Seoul National University College of Medicine, Seoul, South Korea
| | - Y E Kim
- Department of Dermatology, Seoul National University College of Medicine, Seoul, South Korea
| | - S J Jo
- Department of Dermatology, Seoul National University College of Medicine, Seoul, South Korea
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Yoon SJ, Kim YE, Park H, Oh IH, Jo MW, Ock M, Go DS, Kim KA, Kim K. Conducting a national burden of disease study in South Korea: from past to present. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa165.264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
South Korea has been measuring its own burden of disease since the early 2000s and has developed a methodology for its calculation. Since 2012, South Korea has been carrying out disease burden research through the Research and Development Project, supported by the Ministry of Health and Welfare. Because the Korean health insurance system covers the entire population of the country, the Korean National Burden of Disease (KNBD) study is based on individual claims data. Disease prevalence, incidence, and mortality rates, which are the epidemiologic indicators used to calculate burden of disease, are based on actual data, and the incidence-based approach is used for Years Lived with disability (YLD), Years of Life Lost (YLL), and Disability Adjusted Life Year (DALY). The KNBD study is conducted for 260 diseases and injuries and subdivided into sub-national levels. Disability weights (DW) are calculated to reflect the sociocultural characteristics of a disease. For cause-specific DWs, we conducted a self-administered web-based survey for medical doctors and students. Using a ranking method, we calculated cause-specific DWs. For this reason, KNBD study results cannot be directly compared with GBD results.
The major findings of the KNBD study are as follows. In Korea, the DALY rate (per 100,000 people) steadily increased for all income levels. The higher the income, the lower the burden of disease; low-income people had a higher burden of disease than high-income people. However, thyroid cancer, refraction and accommodation disorders had a high burden of disease in the high-income group. Growth in the YLD rate was faster than in the YLL rate. In 2016 the leading causes of disease burden were diabetes mellitus, low back pain, and chronic obstructive pulmonary disease.
We will present South Korea's disease burden calculation methodology and its results and share the efforts to calculate disease burden in other countries.
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Affiliation(s)
- S J Yoon
- Korea University Graduate School of Public Health, Seoul, South Korea
- Department of Preventive Medicine, Korea University College of Medicine, Seoul, South Korea
| | - Y E Kim
- Department of Preventive Medicine, Korea University College of Medicine, Seoul, South Korea
| | - H Park
- Department of Preventive Medicine, Ewha Womans University School of Medicine, Seoul, South Korea
| | - I H Oh
- Department of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - M W Jo
- Department of Preventive Medicine, University of Ulsan College of Medicine, Seoul, South Korea
| | - M Ock
- Department of Preventive Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Seoul South Korea
| | - D S Go
- Department of Preventive Medicine, Korea University College of Medicine, Seoul, South Korea
| | - K A Kim
- Department of Public Health, Korea University Graduate School, Seoul, South Korea
| | - K Kim
- Department of Public Health, Korea University Graduate School, Seoul, South Korea
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Kim BC, Kim YE, Chang HJ, Lee SH, Youk EG, Lee DS, Lee JB, Lee EJ, Kim MJ, Sohn DK, Oh JH. Lymph node size is not a reliable criterion for predicting nodal metastasis in rectal neuroendocrine tumours. Colorectal Dis 2016; 18:O243-51. [PMID: 27166857 DOI: 10.1111/codi.13377] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 04/12/2016] [Indexed: 02/08/2023]
Abstract
AIM The study was designed to assess the correlation between lymph node (LN) size and LN metastasis in patients with rectal neuroendocrine tumours (NETs). METHOD Forty patients who underwent curative resection with lymphadenectomy for a rectal NET between January 2007 and December 2012 were included. The short and long diameters of entire nodes were microscopically measured using a slide gauge. RESULTS In all, 1052 LNs were collected from the 40 patients, with 49 (4.7%) showing evidence of metastasis. Metastasis-positive LNs had significantly greater long and short diameters (P < 0.001) than metastasis-negative LNs. Of the 49 metastatic LNs, 29 (59.2%) were ≤ 5 mm in largest diameter. In five patients, the largest metastatic LN was only 2-3 mm in diameter. In clinically node-negative (cN0) patients, 18 (51.4%) patients had metastatic LNs (pN1). CONCLUSION The size of LNs containing metastasis varied widely, with some being very small. LN size alone is therefore not a sufficient predictor of tumour metastasis in rectal NETs. Radical surgery with lymphadenectomy should be considered for patients with rectal NETs with high risk factors for LN metastasis, even those without LN enlargement.
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Affiliation(s)
- B C Kim
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea
| | - Y E Kim
- Department of Pathology, Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea
| | - H J Chang
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea.,Department of Pathology, Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea
| | - S H Lee
- Department of Pathology, Daehang Hospital, Seoul, Korea
| | - E G Youk
- Department of Surgery, Daehang Hospital, Seoul, Korea
| | - D-S Lee
- Department of Surgery, Daehang Hospital, Seoul, Korea
| | - J B Lee
- Department of Surgery, Daehang Hospital, Seoul, Korea
| | - E-J Lee
- Department of Surgery, Daehang Hospital, Seoul, Korea
| | - M J Kim
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea
| | - D K Sohn
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea
| | - J H Oh
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea
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Lee SJ, Lee SH, Kim YE, Cho YJ, Jeong YY, Kim HC, Lee JD, Kim JR, Hwang YS, Kim HJ, Menzies D. Risk factors for latent tuberculosis infection in close contacts of active tuberculosis patients in South Korea: a prospective cohort study. BMC Infect Dis 2014; 14:566. [PMID: 25404412 PMCID: PMC4237765 DOI: 10.1186/s12879-014-0566-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 10/16/2014] [Indexed: 11/25/2022] Open
Abstract
Background The diagnosis and treatment of latent tuberculosis infection (LTBI) have become mandatory to reduce the burden of tuberculosis worldwide. Close contacts of active TB patients are at high risk of both active and LTBI. The aim of this study is to identify the predominant risk factors of contracting LTBI, persons in close contact with TB patients were recruited. This study also aimed to compare the efficacy of the tuberculin skin test (TST) and QuantiFERON®-TB GOLD (QFT-G) to diagnose LTBI. Methods Close contacts of active pulmonary TB patients visiting a hospital in South Korea were diagnosed for LTBI using TST and/or QFT-G. The association of positive TST and/or QFT-G with the following factors was estimated: age, gender, history of Bacillius Calmette-Guerin (BCG) vaccination, history of pulmonary TB, cohabitation status, the acid-fast bacilli smear status, and presence of cough in source cases. Results Of 308 subjects, 38.0% (116/305) were TST positive and 28.6% (59/206) were QFT-G positive. TST positivity was significantly associated with male gender (OR: 1.734; 95% CI: 1.001-3.003, p =0.049), history of pulmonary TB (OR: 4.130; 95% CI: 1.441-11.835, p =0.008) and household contact (OR: 2.130; 95% CI: 1.198-3.786, p =0.01) after adjustment for confounding variables. The degree of concordance between TST and QFT-G was fair (70.4%, κ =0.392). Conclusions A prevalence of LTBI among close contacts of active pulmonary TB patients was high, and prior TB history and being a household contact were risk factors of LTBI in the study population. Electronic supplementary material The online version of this article (doi:10.1186/s12879-014-0566-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | | | | | | | - Ho Cheol Kim
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, 90 Chilam-Dong, Jinju, Gyeongnam 660-302, South Korea.
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You JW, Lee SJ, Kim YE, Cho YJ, Jeong YY, Kim HC, Lee JD, Kim JR, Hwang YS. Association between weight change and clinical outcomes in critically ill patients. J Crit Care 2013; 28:923-7. [PMID: 24075294 DOI: 10.1016/j.jcrc.2013.07.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 07/17/2013] [Accepted: 07/22/2013] [Indexed: 12/23/2022]
Abstract
PURPOSE Body weight fluctuates daily throughout a patient's stay in the intensive care unit (ICU) due to a variety of factors, including fluid balance, nutritional status, type of acute illness, and presence of comorbidities. This study investigated the association between change in body weight and clinical outcomes in critically ill patients during short-term hospitalization in the ICU. METHODS All patients admitted to the Gyeongsang National University hospital between January 2010 and December 2011 who met the inclusion criteria of age 18 or above and ICU hospitalization for at least 2 days were prospectively enrolled in this study. Body weight was measured at admission and daily thereafter using a bed scale. Univariate and multivariate linear and logistic regression analyses were performed to evaluate factors associated with mortality and the association between changes in body weight and clinical outcomes, including duration of mechanical ventilation (MV) use, length of ICU stay, and ICU mortality. RESULTS Of the 140 patients examined, 33 died during ICU hospitalization, yielding an ICU mortality rate of 23.6%. Non-survivors experienced higher rates of severe sepsis and septic shock and greater weight gain than survivors on days 2, 3, 4, 5, and 6 of ICU hospitalization (P < .05). Increase of body weight on days 2 through 7 on ICU admission was correlated with the longer stay of ICU, and increase on days 3 through 7 on ICU admission was correlated with the prolonged use of mechanical ventilation. Increase of body weight on days 3 through 5 on ICU admission was associated with ICU mortality. CONCLUSIONS Increase in body weight of critically ill patients may be correlated with duration of mechanical ventilation use and longer stay of ICU hospitalization and be associated with ICU mortality.
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Affiliation(s)
- Jung-Wan You
- Public Health Center, Hapcheon-gun, Gyeonsang Namdo, Korea
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Lim SJ, Lew D, Song HN, Kim YE, Lee SJ, Cho YJ, Jeong YY, Park MJ, Jeon KN, Kim HC, Lee JD, Hwang YS. Development of Acute Respiratory Failure on Initiation of Anti-Tuberculosis Medication in Patients with Pulmonary Tuberculosis: Clinical and Radiologic Features of 8 Patients and Literature Review. Korean J Crit Care Med 2013. [DOI: 10.4266/kjccm.2013.28.2.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Su Jin Lim
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Donghoon Lew
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Haa-Na Song
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - You Eun Kim
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Seung Jun Lee
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Yu Ji Cho
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Yi Yeong Jeong
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Mi Jung Park
- Department of Diagnostic Radiology, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Kyoung-Nyeo Jeon
- Department of Diagnostic Radiology, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Ho Cheol Kim
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Jong Deog Lee
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Young Sil Hwang
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
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Lee GD, Kim HC, Kim YE, Lee SJ, Cho YJ, Jeong YY, Jeon KN, Jang IS, Lee JD, Hwang YS. Value of cytologic analysis of bronchial washings in lung cancer on the basis of bronchoscopic appearance. The Clinical Respiratory Journal 2012; 7:128-34. [DOI: 10.1111/j.1752-699x.2012.00293.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Treatment for a 51-year-old man with pulmonary tuberculosis was initiated with isoniazid, rifampicin, ethambutol, and pyrazinamide, and discontinued after 3 weeks because of skin rash and itchiness. Isoniazid monotherapy was restarted after 2 weeks. Two days later, the platelet count decreased from 150 to 4×10(3)/mm(3). Despite platelet transfusion and oral corticosteroid treatment, the platelet count did not recover. However, after a 2-day administration of intravenous immunoglobulin, the platelet count recovered to 209×10(3)/mm(3). This report describes a case of isoniazid-induced thrombocytopenia that was reversed with intravenous immunoglobulin, thus highlighting the efficacy of this treatment for this rare condition.
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Affiliation(s)
- Eun Ju Lee
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Korea
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Lee SJ, Lee SH, Kim YE, Cho YJ, Jeong YY, Kim HC, Lee JD, Kim JR, Hwang YS. Systemic Corticosteroid Treatment in Severe Community-Acquired Pneumonia Requiring Mechanical Ventilation: Impact on Outcomes and Complications. Tuberc Respir Dis (Seoul) 2012. [DOI: 10.4046/trd.2012.72.2.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Seung Jun Lee
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Seung Hun Lee
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
| | - You Eun Kim
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Yu Ji Cho
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Yi Yeong Jeong
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Ho Cheol Kim
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Jong Deog Lee
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Jang Rak Kim
- Gyeongsang Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, Korea
- Department of Preventive Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Young Sil Hwang
- Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, Korea
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12
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Lee SH, Lee MJ, Lee JM, Yim SJ, Lee SJ, Kim YE, Cho YJ, Jeong YY, Kim HC, Lee JD, Kim SJ, Hwang YS. Usefulness of the BACTEC MGIT 960 System for Mycobacterial Culture and TB Ag MPT64 Immunochromatographic Assay to Identify Mycobacterium tuberculosis. Yeungnam Univ J Med 2012. [DOI: 10.12701/yujm.2012.29.2.83] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Seung Hun Lee
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Min Jeong Lee
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Jeong-Mi Lee
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Su Jin Yim
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Seung Jun Lee
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - You Eun Kim
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Yu Ji Cho
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Yi Yeong Jeong
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Ho Cheol Kim
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Jong Deog Lee
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Sun Joo Kim
- Department of Laboratory Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Young Sil Hwang
- Department of Internal Medicine, School of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, Korea
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Lim BC, Ki CS, Cho A, Hwang H, Kim KJ, Hwang YS, Kim YE, Yun JY, Jeon BS, Lim YH, Paek SH, Chae JH. Pantothenate kinase-associated neurodegeneration in Korea: recurrent R440P mutation in PANK2 and outcome of deep brain stimulation. Eur J Neurol 2011; 19:556-61. [PMID: 22103354 DOI: 10.1111/j.1468-1331.2011.03589.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND PURPOSE The purpose of this study was to evaluate the mutation status of PANK2 among Korean patients with pantothenate kinase-associated neurodegeneration (PKAN) and to document the outcome of pallidal deep brain stimulation (DBS). METHODS Direct sequencing and deletion/duplication analysis of PANK2 were conducted in 12 patients (11 unrelated) with PKAN, diagnosed on the basis of extrapyramidal dysfunction and the 'eye-of-the-tiger sign' on brain magnetic resonance imaging (MRI). Pallidal DBS was conducted in four patients, and the outcomes were measured using the Burke-Fahn-Marsden Dystonia Rating Scale (BFMDRS). RESULTS A PANK2 mutation was identified in both alleles in all patients. The most prevalent mutation was c.1319G>C (p.R440P) in 8/22 mutated alleles (36%). An intragenic deletion ranging from exons 2 to 4 was found in one allele (1/22, 4.5%) using deletion/duplication analysis. The outcome of pallidal DBS was favorable in two patients with atypical PKAN and moderate severity of dystonia. However, two patients with typical PKAN and relatively severe symptoms showed variable responses. CONCLUSIONS The c.1319G>C (p.R440P) mutation appears to be a founder genotype among Korean patients with PKAN. Furthermore, this study provides additional data for the recent international effort to evaluate the efficacy of pallidal DBS in the treatment of patients with PKAN.
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Affiliation(s)
- B C Lim
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea.
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Ma JE, Yun EY, Kim YE, Lee GD, Cho YJ, Jeong YY, Jeon KN, Jang IS, Kim HC, Lee JD, Hwang YS. Endobronchial aspergilloma: report of 10 cases and literature review. Yonsei Med J 2011; 52:787-92. [PMID: 21786444 PMCID: PMC3159936 DOI: 10.3349/ymj.2011.52.5.787] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
PURPOSE A retrospective investigation of the clinical and radiologic features as well as the bronchoscopic appearance was carried out in patients with endobronchial aspergilloma. MATERIALS AND METHODS Ten patients with endobronchial aspergilloma diagnosed by bronchoscopy and histological examination were identified at the Gyeongsang University Hospital of Korea, from May 2003 to May 2009. RESULTS The patients included 9 men and 1 woman, and the age of the patients ranged from 36 to 76 (median, 58 years). The associated diseases or conditions were: previous pulmonary tuberculosis in 7 patients, lung cancer in 2 patients, pulmonary resection in 1 patient, and foreign body of the bronchus in 1 patient. The chest radiologic finding showed fibrotic changes as a consequence of previous tuberculosis infection in 6 patients and a mass-like lesion in 2 patients. Two patients had a co-existing fungus ball, and an endobronchial lesion was suspected in only 2 patients on the CT scan. The bronchoscopic appearance was a whitish to yellow necrotic mass causing bronchial obstruction in 7 patients, foreign body with adjacent granulation tissue and whitish necrotic tissue in 1 patient, whitish necrotic tissue at an anastomosis site in 1 patient, and a protruding mass with whitish necrotic tissue in 1 patient. CONCLUSION An endobronchial aspergilloma is a rare presentation of pulmonary aspergilosis and is usually incidentally found in immunocompetent patients with underlying lung disease. It usually appears as a necrotic mass causing bronchial obstruction on bronchoscopy and can be confirmed by biopsy.
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Affiliation(s)
- Jeong Eun Ma
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Eun Young Yun
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - You Eun Kim
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Gi Dong Lee
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Yu Ji Cho
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Yi Yeong Jeong
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Kyoung-Nyeo Jeon
- Department of Diagnostic Radiology, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - In Seok Jang
- Department of Thoracic Surgery, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Ho Cheol Kim
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Jong Deok Lee
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Young Sil Hwang
- Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
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Yun EY, Kim HS, Kim YE, Kang MK, Ma JE, Lee GD, Cho YJ, Kim HC, Lee JD, Hwang YS, Jeong YY. A case of anaphylaxis after the ingestion of yacon. Allergy Asthma Immunol Res 2010; 2:149-52. [PMID: 20358031 PMCID: PMC2846740 DOI: 10.4168/aair.2010.2.2.149] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 12/30/2009] [Indexed: 12/04/2022]
Abstract
Anaphylaxis is a potentially life-threatening systemic allergic reaction, often with an explosive onset; the symptoms range from mild flushing to upper respiratory obstruction, with or without vascular collapse. Foods are common offending allergens and remain the leading cause of outpatient anaphylaxis in most surveys. Yacon (Smallanthus sonchifolius) is a plant native to the Andes region, where its root is cultivated and consumed mainly as food. Unlike most edible roots, yacon contains large amounts of ructooligosaccharides. Traditionally, yacon tubers have been used as a source of natural sweetener and syrup for people suffering from various disorders. We report the case of a 55-year-old woman who developed syncope and generalized urticaria after ingesting yacon roots. The patient had positive skin prick and intradermal tests to yacon extract. An open food challenge test was performed to confirm food anaphylaxis and was positive 10 minutes after the consumption of yacon roots. To our knowledge, this is the first reported case of anaphylaxis after the ingestion of yacon roots.
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Affiliation(s)
- Eun Young Yun
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Hyun Sik Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - You Eun Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Min Kyu Kang
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jeong Eun Ma
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Gi Dong Lee
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Yu Ji Cho
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Ho Cheol Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jong Deok Lee
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Young Sil Hwang
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Yi Yeong Jeong
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
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Yun EY, Cho SH, Go SI, Baek JH, Kim YE, Ma JE, Lee GD, Cho YJ, Jeong YY, Kim HC, Lee JD, Kim SJ, Hwang YS. Usefulness of Real-time PCR to DetectMycobacterium tuberculosisand Nontuberculous Mycobacteria. Tuberc Respir Dis (Seoul) 2010. [DOI: 10.4046/trd.2010.69.4.250] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Eun Young Yun
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Su Hee Cho
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Se Il Go
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jong Ha Baek
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - You Eun Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jeong Eun Ma
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Gi Dong Lee
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Yu Ji Cho
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Yi Yeong Jeong
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Ho Cheol Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Jong Deok Lee
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
| | - Sun-Joo Kim
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
- Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Young Sil Hwang
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
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Park SK, Joo JS, Kim DH, Kim YE, Kang D, Yoo KY. Association of serum lipids and glucose with the risk of colorectal adenomatous polyp in men: a case-control study in Korea. J Korean Med Sci 2000; 15:690-5. [PMID: 11194196 PMCID: PMC3054711 DOI: 10.3346/jkms.2000.15.6.690] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Previous studies on life style for colorectal cancer risk suggest that serum lipids and glucose might be related to adenomatous polyps as well as to colorectal carcinogenesis. This case-control study was conducted to investigate the associations between serum lipids, blood glucose, and other factors and the risk of colorectal adenomatous polyp. Male cases with colorectal adenomatous polyp, histologically confirmed by colonoscopy (n=134), and the same number of male controls matched by age for men were selected in hospitals in Seoul, Korea between January 1997 and October 1998. Serum lipids and glucose levels were tested after the subjects had fasted for at least 12 hr. Conditional logistic regression showed that there was a significant trend of increasing adenomatous polyp risk with the rise in serum cholesterol level (Ptrend=0.07). Increasing trend for the risk with triglyceride was also seen (Ptrend=0.01). HDL-cholesterol and LDL-cholesterol had increasing trends for the risk, which were not significant. In particular, it was noted that higher fasting blood glucose level reduced the adenomatous polyp risk for men (Ptrend=0.001). This study concluded that both serum cholesterol and triglyceride were positively related to the increased risk for colorectal adenomatous polyp in Korea. Findings on an inverse relationship between serum glucose and the risk should be pursued in further studies.
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Affiliation(s)
- S K Park
- Department of Preventive Medicine, Dongguk University College of Medicine, Kyungju, Korea
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Abstract
STUDY DESIGN A three-dimensional nonlinear poroelastic finite-element model of a vertebra disc was used to analyze the biomechanical effects of impact loading on the spinal segment. OBJECTIVES To predict changes in biomechanical parameters such as intradiscal pressure, dynamic stiffness, stresses in the endplate region, and the shock-absorbing mechanism of the spine under different impact duration/loading rates, and to investigate the relation between the rate of loading and the fracture potential of the vertebral body. SUMMARY OF BACKGROUND DATA It is not practical to discern the role of impact duration using experimental protocols. Analytical studies are better suited to this purpose. However, previous poroelastic finite-element models of the motion segments have dealt mostly with creep phenomena. METHODS A three-dimensional, L3-L4 motion-segment, finite-element model was modified to incorporate the poroelastic properties of the disc, endplate, and cancellous core, and thus simulate the shock-absorbing phenomena. The results were analyzed under variable impact durations for a constant maximum compressive impact load of 3 kN. RESULTS For a shorter impact duration and a given F(max), relatively high cancellous core pressure was generated as compared with a case of long impact duration, although the amount of impulse was increased. In contrast, relatively constant pore pressures were generated in the nucleus regardless of the impact duration. The changes in spinal segment stiffness as a function of impact duration indicated that for a shorter duration of impact, high dynamic stiffness increases the stability of the spinal segment against the impact load. However, the corresponding increase in stresses within the vertebral body and endplate may produce fractures. CONCLUSIONS The finite-element technique was used to address the role of impact duration in producing trauma to the spinal motion segment. Within the limitations of the model, the results suggest that fractures are likely to occur under shorter impact duration conditions. Depending on the strength of the region, a fracture may be initiated in the endplate region or the posterior wall of the cortical shell. The nucleus pressure is independent of the impact duration and depends only on the magnitude of the impact force.
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Affiliation(s)
- C K Lee
- Department of Orthopedic Surgery, College of Medicine, Seoul National University Hospital, Seoul, Korea
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Abstract
This study investigates variations in survival following surgery for colo-rectal cancer in the Wessex region (part of southern England), using 5147 cases diagnosed between 1 September 1991 and 31 August 1995. Survival curve estimation by life tables and Cox's proportional hazards model were used to examine geographical variation in cancer survival, with a specific focus on distance between place of residence and treatment centre, and district of treatment. We also consider whether area deprivation has an impact on survival. In seeking to answer these questions we control for possible confounders, including: age, gender, site of tumour, stage of disease at operation, hospital size and surgery type (whether elective or non-elective). District of treatment, distance and deprivation all show a relationship to outcome using survival curves, but when adjusting for other covariates using the Cox model, and considering deaths from all causes, only district of treatment was a very significant covariate (p < 0.0001). Distance, deprivation, and gender were only weakly significant (p < 0.10). Considering only deaths related to operation (within 30 days) district of treatment remained significant, but while distance had some effect on outcome, deprivation and gender ceased to be significant covariates. There is some evidence that those who live furthest from centres of treatment have the worst outcomes but the 'geography of survival' manifests itself more through where patients are treated than through area (deprivation) effects or relative location. The results have important policy implications, as they show variations among treatment centres having controlled for potentially confounding factors.
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Affiliation(s)
- Y E Kim
- Department of Geography, Lancaster University, UK
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20
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Kim YE, Zubarev AL. Excited halo nuclear state and long range interaction in nuclear reactions. Phys Rev C Nucl Phys 1996; 54:1805-1810. [PMID: 9971528 DOI: 10.1103/physrevc.54.1805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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21
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Beebe LE, Kim YE, Amin S, Riggs CW, Kovatch RM, Anderson LM. Comparison of transplacental and neonatal initiation of mouse lung and liver tumors by N-nitrosodimethylamine (NDMA) and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and promotability by a polychlorinated biphenyls mixture (Aroclor 1254). Carcinogenesis 1993; 14:1545-8. [PMID: 8353839 DOI: 10.1093/carcin/14.8.1545] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
We have previously shown a positive tumor-promoting effect of a single dose of Aroclor 1254 on lung and liver tumors initiated neonatally in the mouse by N-nitrosodimethylamine (NDMA). In this study, we have confirmed and extended this observation with NDMA and the tobacco-specific nitrosamine, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) given either transplacentally or postnatally, followed by a single dose of Aroclor 1254 on day 56. This polychlorinated biphenyl (PCB) mixture was an effective promoter of both lung and liver tumors; however, there were specific initiator and sex-related differences in this response. Aroclor administration significantly increased the incidence of lung tumors initiated transplacentally by NDMA or NNK in male mice. Neither nitrosamine initiated tumors transplacentally in females, but lung tumors initiated with NNK and liver tumors caused by NDMA in neonatal females were promoted by PCBs. Both liver and lung tumors initiated neonatally by NDMA in male animals, but not NNK-initiated tumors, were promoted by PCBs. These data confirm that PCBs are able to promote both NDMA- and NNK-initiated tumors, but with chemical-, sex- and age-dependent difference; this suggests influences of both quantitative and qualitative factors in susceptibility to tumor promotion.
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Affiliation(s)
- L E Beebe
- Laboratory of Comparative Carcinogenesis, Frederick Cancer Research and Development Center (FCRDC), MD 21702
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Abstract
Nonlinear three-dimensional finite element models of a ligamentous two motion segments spine specimen (L3-L4-L5) were developed to investigate the effects of disc degeneration, simulated at the L4-L5 level, on the biomechanical behavior of the adjacent intact L3-L4 motion segment. The disc degeneration was simulated by removing the hydrostatic capabilities of the nucleus and making the L4-L5 disc stiffer than a normal disc. The results of the degenerated model were compared with the predictions for a model in which the L4-L5 disc was left intact. The loads on the facets decreased, and intradiscal pressure in the intact L3-L4 disc increased as a result of disc degeneration compared with the intact model. The predicted increase in the intradiscal pressure and the associated increase in the disc bulge in the posterior region over time may trigger the degenerative process at the L3-L4 motion segment. This is in accordance with the Wolff's law; living tissue responds to chronic changes in stresses and strains. The limitations of the present two motion segments model and the potentials of multisegmental models are discussed.
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Affiliation(s)
- Y E Kim
- Department of Mechanical Engineering, Dankook University, Seoul, Korea
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Abstract
A three-dimensional finite element model of an intact ligamentous lumbar motion segment (L3-4) was used to predict stresses in the pars interarticularis regions of the modeled vertebral bodies. The changes in stresses following disk excision, as compared to the intact model, also were computed. The predicted results show an increase in stresses in the posterior bony elements following disk excision. In some patients over a long period of time this increase in stresses, in association with other clinical factors, may lead to bony hypertrophy of the structures that surround the nerve roots. Ultimately, over a long period of time the increase in pressure on the entrapped nerve root may induce recurrent pain and other complications reported in the literature.
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Affiliation(s)
- V K Goel
- Department of Biomedical Engineering, University of Iowa, Iowa City 52242
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Affiliation(s)
- Y E Kim
- Department of Biomedical Engineering, University of Iowa, Iowa City 52242
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Goel VK, Clark CR, Harris KG, Kim YE, Schulte KR. Evaluation of effectiveness of a facet wiring technique: an in vitro biomechanical investigation. Ann Biomed Eng 1989; 17:115-26. [PMID: 2729680 DOI: 10.1007/bf02368022] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The effects of facet wiring procedure commonly used for stabilizing cervical spines after laminectomy or bilateral facet dislocation on the motion behavior of whole cervical spines are investigated using a Selspot II system. A fresh human ligamentous intact specimen was potted at T1/T2 vertebra and clinically relevant loads applied to the topmost vertebra (C2) of the specimen. The resulting three rotational components of each of the five vertebral bodies (C3-C7) were recorded. Specimen was injured to mimic total laminectomies at C5 and C6 vertebral levels and tested again. The injured specimen was stabilized, using a facet wiring construct, across C4-C7 segment before testing for the final time. The injured specimens, compared to the intact specimens, demonstrated an increase in flexion-extension of about 10%. Facet wiring imparted stability to the cervical spine by stiffening segments up to roughly four times intact values.
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Affiliation(s)
- V K Goel
- Department of Biomedical Engineering, University of Iowa, Iowa City 52242
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Kim KT, Kim YE, Klepacki DJ, Brandenburg RA, Harper EP, Machleidt R. Charge form factors and root mean square radii of 3He and 3H with the new Bonn potential. Phys Rev C Nucl Phys 1988; 38:2366-2376. [PMID: 9955062 DOI: 10.1103/physrevc.38.2366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
Three-dimensional nonlinear finite element models of the intact L4-5 one motion segment/two-vertebrae and L3-5 two motion segments/three-vertebrae were developed using computed tomography (CT) films. The finite element mesh of the L4-5 motion segment model was modified to simulate bilateral decompression surgery. The mesh was further altered to achieve stabilization, using an interbody bone graft and a set of Steffee plates and screws. The model behavior of the intact specimen in all loading modes and of the stabilized model in compression, flexion, and extension modes were studied. The stresses in the cancellous bone region were found to decrease. The interbody bone graft, due to an overall decrease in stresses in the bone below the screw, transmits about 80% of the axial load as compared with 96% transmitted by an intact disc in an intact model. Thus, the use of a fixation device induces a stress shielding effect in the vertebral body. The results indicate that although the bone graft transmits lesser loads than the intact disc, it is active in transmitting loads. The presence of low stresses in the cancellous bone region and high localized stresses in the cortical pedicle region surrounding the screw, compared with the intact case, suggests that the screws are likely to become loose over time. The use of an interbody bone graft alone or in combination with any existing fixation device also induces higher stresses at the adjacent levels. This may be responsible for the adverse iatrogenic effects seen clinically.
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Affiliation(s)
- V K Goel
- Department of Biomedical Engineering, University of Iowa, Iowa City
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Klepacki DJ, Kim YE, Brandenburg RA. Trinucleon asymptotic normalization constants with the new Bonn potential. Phys Rev C Nucl Phys 1988; 38:998-1002. [PMID: 9954895 DOI: 10.1103/physrevc.38.998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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30
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Brandenburg RA, Chulick GS, Kim YE, Klepacki DJ, Machleidt R, Picklesimer A, Thaler RM. Nuclear charge symmetry breaking and the 3H. Phys Rev C Nucl Phys 1988; 37:781-785. [PMID: 9954498 DOI: 10.1103/physrevc.37.781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Kim KT, Kim YE, Landau RH. Microscopic optical-potential analysis of charge-symmetry violation in pi +/- elastic scattering from 3H and 3He 3He. Phys Rev C Nucl Phys 1987; 36:2155-2158. [PMID: 9954334 DOI: 10.1103/physrevc.36.2155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
A linear optimization model was formulated using a semi-experimental protocol to estimate the forces in the spinal elements of a lumbar motion segment subjected to an extension or lateral bending moment with and without a 120 N compressive preload. A morphometer was used to acquire the three-dimensional locations of the disk center, facet centers and ligament origin and insertion sites with the specimen in a "neutral" position. The relative motion of the superior vertebra, under the loading conditions tested, was monitored using a Selspot II system. These data allowed the formulation of the static equilibrium equations for the superior vertebra at each of the loading conditions mentioned above. A linear optimization technique was used, along with a suitable cost function, to find an optimum solution for the set of equations and imposed constraints. Results showed that for 6.9 Nm of extension moment, each facet carried a load of 52 N, with the disk carrying an axial tensile load of 104 N. At the 6.9 Nm extension moment coupled with 120 N preload, each facet carried a load of 77.2 N and the disk an axial tensile load of 37 N. In right lateral bending, with and without preload, the load was distributed among the right facet, the disk, the left ligamentum flavum and the left capsular ligament. At the 6.9 Nm load step without preload the right facet carried an axial load of 127.01 N with the disk carrying an axial compressive load of 7.8 N. Ligament forces for this step for the left ligamentum flavum and capsular ligament, respectively, were 61.03 N and 65.14 N. The addition of 120 N of preload reduced the load on the right facet to 83.5 N. The compressive load in the disk increased to 107.5 N. The corresponding ligament forces were 43.2 N (left ligamentum flavum) and 50.7 N (left capsular ligament).
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Affiliation(s)
- V K Goel
- Department of Biomedical Engineering, University of Iowa, Iowa City 52242
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Kim YE. Apparent anomalously short mean free paths observed in relativistic heavy-ion collisions. Phys Rev Lett 1986; 57:2508-2511. [PMID: 10033785 DOI: 10.1103/physrevlett.57.2508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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35
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Orlowski M, Kim YE. On-shell equivalent transformations for eliminating energy dependence from coupled channel equations with nonlocal linearly energy-dependent potentials. Phys Rev C Nucl Phys 1986; 34:1571-1579. [PMID: 9953625 DOI: 10.1103/physrevc.34.1571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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36
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Orlowski M, Kim YE. Charge independence breaking and the triton binding energy. Phys Rev C Nucl Phys 1985; 32:1376-1379. [PMID: 9952980 DOI: 10.1103/physrevc.32.1376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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38
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