• Title/Summary/Keyword: Epidemiologic Studies

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Update of Sepsis: Recent Evidences about Early Goal Directed Therapy

  • Cho, Woo Hyun
    • Tuberculosis and Respiratory Diseases
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    • v.78 no.3
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    • pp.156-160
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    • 2015
  • Severe sepsis and septic shock is a life-threatening disease. It is combined with multi-organ failure. In the past decade, early goal directed therapy has been proposed as an effective treatment strategy for better outcome. Recent epidemiologic studies showed that the outcome of sepsis has been improved with the introduction of early goal directed therapy. However, it is unclear which elements of early goal directed therapy contributed to the better outcome. Recent prospective and randomized trials suggested that some elements of early goal directed therapy did not have any effect on the outcome benefit. In this paper, recent articles about early goal directed therapy will be reviewed and the effectiveness of individual elements of early goal directed therapy will be discussed.

Recent outbreaks of rabies in Gangwon-do (강원도내 광견병 발생 및 진단)

  • 신은경;신명균;한태옥
    • Korean Journal of Veterinary Service
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    • v.27 no.1
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    • pp.31-39
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    • 2004
  • This study was performed to investigate the rabies surveillance in Gangwon-do from 1997 to 2001. Of 185 laboratory submissions for rabies diagnosis, 65(35.1%) cases were determined to be infected with the rabies virus. Annual incidence of animal rabies was 10 cases in 1997, 20 cases in 1998, 16 cases in 1999, 3 cases in 2000, and 16 cases in 2001, respectively. The total number of the reported cases were increased 382% compared with that of the previous period from 1993 to 1996(7 cases). The relative contributions of infected animals in this period were as follows: cattles(24 cases), dogs(26 cases), and raccoons(15 cases). Rabies outbreak in raccoon were steadily expanded. Epidemiologic surveillance showed the rabies outbreaks spreaded to the southern area in Gangwon-do. All rabies cases were showed positive results to rabies tests such as clinical signs, histopathological findings, indirect flourescent antibody test, and mouse inoculation test. Further studies such as genetic and phylogenetic analysis of the isolates should be performed in order to figure out accurate rabies outbreak.

Exposure limits of Magnetic fields of High Voltage Transmission lines for Evaluation of Environmental Impact (고압선로 환경영향평가의 자기장 노출범위설정에 관한 연구)

  • Jeon, In-Soo
    • Journal of Environmental Impact Assessment
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    • v.13 no.5
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    • pp.243-250
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    • 2004
  • Recently, concerns about health risks exposed to electromagnetic fields have been brought in the safety of electric power lines. A number of governmental and international organizations have advised to avoid the magnetic field exposure to the schools and residential areas. Some epidemiologic studies showed that electromagnetic fields should not exceed the exposure limits of 2-3mG to the people living near high-voltage transmission lines. In this study, the principles, ranges and survey methods of the assessment for powerfrequency electromagnetic fields were reviewed from the relevant research papers and documents. The ranges of electromagnetic fields were determined from 50m to 100m and have been defined according to the properties of each electric power lines and a new methodology was suggested in this study. It would be necessary to develop and improve specific assessment methods for various high-voltage transmission lines projects.

Low Density Lipoprotein(LDL), Atherosclerosis and Antioxidants

  • Ryu, Beung-Ho
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.5 no.5
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    • pp.313-319
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    • 2000
  • A crucial and causative role in the pathogenesis of atherosclerosis is believed to be the oxidative modification of low density lipoprotein (LDL). The oxidation of LDL involves released free radical driven lipid peroxidation. Several lines of evidence support the role of oxidized LDL in atherogenesis. Epidemiologic studies have demonstrated an association between an increased intake of dietary antioxidant vitamins, such as vitamin E and vitamin C and reduced morbidity and mortality from coronary artery diseases. It is thus hypothesized that dietary antioxidants may help prevent the development and progression of atherosclerosis. The oxidation of LDL has been shown to be reduced by antioxidants, and, in animal models, improved antioxidants may offer possibilities for the prevention of atherosclerosis. The results of several on going long randomized intervention trials will provide valuahle information on the efficacy and safety of improved antioxidants in the prevention of atherosclerosis. This review a evaluates current literature involving antioxidants and vascular disease, with a particular focus on the potential mechanisms.

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The Clinical and Epidemiological Studies of Epidermophyton floccosum Infections(1998~2007) (최근 10년간 Epidermophyton floccosum의 감염 상태(1998-2007))

  • Bang, Young-Jun;Kim, Ssang-Young
    • Korean Journal of Clinical Laboratory Science
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    • v.41 no.2
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    • pp.57-61
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    • 2009
  • Epidermophyton floccosum was known to be a frequently isolated dermatophyte agent of dermatophytosis in Korea, which regularly responsible for a small percentage of tinea cruris, tinea pedis, tinea corporis and onychomycosis. The purpose of this study was to investigate epidemiologic aspects of E. floccosum isolated in 71 patients from January 1998 to December 2007. The incidence of E. floccosum. was 0.07% out of a total of 107,026 dermatophytosis. The ratio of male to female patients was 6.9:1. Involved tinea were tinea cruris 44 (62.0%), tinea pedis 20 (28.2%), tinea corporis 2 (2.8%), tinea manus 2 (2.8%), tinea unguium 2 (2.8%), tinea faciale 1 (1.4%).

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Reality of Kawasaki disease epidemiology

  • Kim, Gi Beom
    • Clinical and Experimental Pediatrics
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    • v.62 no.8
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    • pp.292-296
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    • 2019
  • Epidemiologic studies of Kawasaki disease (KD) have shown a new pattern or change of its occurrence suggestive of its pathophysiology or risk factors from the first patient with KD reported in 1961. The incidence of KD in Northeast Asian countries including Japan, South Korea, China, and Taiwan is 10-30 times higher than that in the United States and Europe. Knowing the true epidemiology of KD in each country and the availability of publications of KD epidemiology also could benefit general health care providers and general population. This would enable the early detection and treatment of KD, ultimately reducing the incidence of coronary artery complications and mortality. Therefore, efforts to investigate the true epidemiology of KD should be continued in every country using a questionnaire survey, National Health Insurance system data, or combined methods depending on each country's medical environment to ensure high-quality care of patients with KD.

Long Term Proton Pump Inhibitor Use and Gastric Cancer (장기간 양성자펌프억제제의 사용과 위암)

  • Seung In Seo
    • Journal of Digestive Cancer Research
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    • v.10 no.1
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    • pp.9-15
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    • 2022
  • Proton pump inhibitors (PPIs), a potent gastric acid inhibitor, are widely used in gastric acid-related diseases such as gastroesophageal reflux disease and peptic ulcer, and are known as the most frequently used drugs worldwide. However, as the frequency of use increases, the number of cases of long-term PPI therapy without clear indications is increasing. Recently, there have been concerns about the risk of gastric cancer in patients with long-term PPI users. Potential mechanisms for the association between PPI and gastric cancer include enterochromaffin-like cell proliferation due to hypergastrinemia caused by gastric acid suppression, progression of atrophic gastritis, and corpus-predominant type through interaction with Helicobacter pylori (H. pylori) infection. Several epidemiologic studies showed controversial results on the issue, and it is difficult to prove a causal relationship between PPI and gastric cancer. Nevertheless, long-term PPI should be administered cautiously based on individual risk-benefit profile, specifically among those with history of H. pylori infection, in high-risk region of gastric cancer.

A clinical case study of Irritable bowel syndrome patient with chronic diarrhea (만성설사를 주소로 한 과민성 대장증후군 환자의 치험례)

  • Kim, Kyung-sok;Lee, Sang-yong;Kim, Jae-hoon;Kwon, Do-ick
    • Journal of Sasang Constitutional Medicine
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    • v.13 no.3
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    • pp.134-139
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    • 2001
  • The irritable bowel syndrome(IBS) is the most common gastrointestinal disorder in clinical practice and is characterized by abdominal pain associated with a chronic disturbance of defecation. It is important to discriminate IBS from organic bowel disease. Based on clinical and epidemiologic studies, specific symptom criteria for IBS have been developed. The subject is a 29 year old man who has abdominal pain, chronic diarrhea, general weakness, dizziness, insomnia and has been diagnosed as irritable bowel syndrome. We classified this as Shaoyangin Mangyin(少陽人 亡陰證) and prescribed Hyeongbangjiwhangtang(荊防地黃湯) in accordance with the principle of pyoeumganggi(表陰降氣). In the result, we had the improvement of his symptoms.

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Obesity and Risk of Bladder Cancer: A Meta-analysis of Cohort Studies

  • Qin, Qi;Xu, Xin;Wang, Xiao;Zheng, Xiang-Yi
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.5
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    • pp.3117-3121
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    • 2013
  • Objective: Previous epidemiologic studies demonstrated that obesity might associated with the risk of bladder cancer. However, many of the actual association findings remained conflicting. To better clarify and provide a comprehensive summary of the correlation between obesity and bladder cancer risk, we conducted a meta-analysis to summarize results of studies on the issue. Stratified analyses were also performed on potential variables and characteristics. Methods: Studies were identified by searching in PubMed and Wanfang databases, covering all the papers published from their inception to March 10, 2013. Summary relative risks (SRRs) with their corresponding 95% confidence intervals (CIs) were calculated by either random-effect or fixed-effect models. Results: A total of 11 cohort studies were included in our meta-analysis, which showed that obesity was associated with an increased risk for bladder cancer in all subjects (RR=1.10, 95% CI=1.06-1.16; p=0.215 for heterogeneity; $I^2$=24.0%). Among the 9 studies that controlled for cigarette smoking, the pooled RR was 1.09 (95% CI 1.01-1.17; p=0.131 for heterogeneity; $I^2$=35.9%). No significant publication bias was detected (p = 0.244 for Egger's regression asymmetry test). Conclusions: Our results support the conclusion that obesity is associated with the increased risk of bladder cancer. Further research is needed to generate a better understanding of the correlation and to provide more convincing evidence for clinical intervention in the prevention of bladder cancer.

The Concepts of Nanotoxicology and Risk Assessment of the Nanoparticles (나노 독성의 개념 및 나노입자에 대한 위해성 평가의 필요성)

  • Maeng, Seung-Hee;Yu, Il-Je
    • Toxicological Research
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    • v.21 no.2
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    • pp.87-98
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    • 2005
  • Human exposure to nano-sized particles (NSP) has increased over the last century with anthropogenic sources, and the rapid development of nanotechnology becomes an another source of such exposure. Information regarding the safety of nanotechnology and its product, nanoparticles, is urgently needed when assuming exposure through inhalation, oral intake, and penetration across skin is ever increasing as growing nanotechnology rapidly. The recent advancement of biokinetic studies with NSP and newer epidemiologic and toxicologic studies with ultrafine particles can be the basis for the nanotoxicology. Some concepts of nanotoxicology can be known from the results of these results. Specific small size of NSP, when inhaled, facilitates deposition by difusional mechanism in all regions of the respiratory tract and uptake into cells, ranscytosis across epithelial and endothelial cells into the blood and lymph circulation to reach target sites. Translocation along axons and dendrites of neuron makes an access to CNS and ganglia. These biokinetics are dependent on NSP surface chemistry. Risk assessments of NSP include appropriate and relevant doses/concentration selections, the increase effects in the organism and the benefits of possible desirable effects. An interdisciplinary team approach is desirable for nanotoxicology research and an appropriate risk assessment.