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( Shinsuke Mikami ),( Takafumi Sugihiro ),( Satoshi Mouri ),( Yusuke Ueda ),( Hitoshi Susawa ),( Kengo Kobayashi ),( Haruki Tanaka ),( Kouichi Tanaka ),( Yukihito Higashi ),( Yasuki Kihara ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: Foot ulcers are costly complication among diabetes patients. These patients have an increased risk of amputation and increased mortality rate. Early recognition of the high-risk foot and sufficient care will save legs and improve patients` quality of life. Figures of incidence of foot ulcers varies and there are only limited information in relation the change of incidence over time. The aim of this study was to estimate 5-year risk for diabetic foot ulcer (DFU), lower extremity amputation (LEA) and all cause of death. Methods: Retrospective cohort study including all subjects with diabetes enrolled in our diabetic outpatient clinic from beginning 2008 until middle 2014. Data were collected from clinical records. Results: 528 subjects with mean age of 61.3 (±13.8), 57.4% were male. The mean of HbA1c in diabetic patients at baseline were 8.1% +/- 1.9%. Cumulative incidence was 1.3% for DFU, 0.18% for LEA and 4.7% for all-cause of death. The prevalence of cardiovascular and cerebrovascular conditions, pneumonia were 2.3%, 1.9%, 2.3%, respectively. Cause of deaths was cancer (64%), pneumonia (20%), cardiovascular death (4%). Conclusions: Several factors may explain the incidence in diabetes-related LEAs. Diabetes prevention strategies and controlling risk factors are important in people with type 1 and 2 diabetes.
Saito, Kimiaki,Mikami, Satoshi,Andoh, Masaki,Matsuda, Norihiro,Kinase, Sakae,Tsuda, Shuichi,Sato, Tetsuro,Seki, Akiyuki,Sanada, Yukihisa,Wainwright-Murakami, Haruko,Yoshimura, Kazuya,Takemiya, Hiroshi The Korean Association for Radiation Protection 2019 방사선방어학회지 Vol.44 No.4
Massive environmental monitoring has been conducted continuously since the Fukushima Daiichi Nuclear Power accident in March of 2011 by different monitoring methods that have different features together with migration studies of radiocesium in diverse environments. These results have clarified the characteristics of radiological environments and their temporal change around the Fukushima site. At three months after the accident, multiple radionuclides including radiostrontium and plutonium were detected in many locations; and it was confirmed that radiocesium was most important from the viewpoint of long-term exposure. Radiation levels around the Fukushima site have decreased greatly over time. The decreasing trend was found to change variously according to local conditions. The air dose rates in environments related to human living have decreased faster than expected from radioactive decay by a factor of 2-3 on average; those in pure forest have decreased more closely to physical decay. The main causes of air dose rate reduction were judged to be radioactive decay, movement of radiocesium in vertical and horizontal directions, and decontamination. Land-use categories and human activities have significantly affected the reduction tendency. Difference in the air dose rate reduction trends can be explained qualitatively according to the knowledge obtained in radiocesium migration studies; whereas, the quantitative explanation for individual sites is an important future challenge. The ecological half-lives of air dose rates have been evaluated by several researchers, and a short-term half-life within 1 year was commonly observed in the studies. An empirical model for predicting air dose rate distribution was developed based on statistical analysis of an extensive car-borne survey dataset, which enabled the prediction with confidence intervals. Different types of contamination maps were integrated to better quantify the spatial data. The obtained data were used for extended studies such as for identifying the main reactor that caused the contamination of arbitrary regions and developing standard procedures for environmental measurement and sampling. Annual external exposure doses for residents who intended to return to their homes were estimated as within a few millisieverts. Different forms of environmental data and knowledge have been provided for wide spectrum of people. Diverse aspects of lessons learned from the Fukushima accident, including practical ones, must be passed on to future generations.
Radiation Distribution Around Fukushima Daiichi Nuclear Power Station Decade After the Accident
Yukihisa Sanada,Miyuki Sasaki,Hiroshi Kurikami,Fumiya Nagao,Satoshi Mikami 한국방사성폐기물학회 2023 방사성폐기물학회지 Vol.21 No.1
During the decades after the Fukushima Daiichi Nuclear Power Station (FDNPS) accident, ambient dose rates have markedly decreased when compared to those at the early state of the accident. Government projects have been continuously conducted by surveying the ambient dose rate and radiocesium distributions. Airborne surveys using crewed helicopters and unmanned aerial vehicles (UAVs) are the best methods for obtaining an overall picture of the distribution. However, ground-based surveys are required for accurate measurements near the population. The differences between these methods include the knowledge of the post depositional behavior of radionuclides in land use. The survey results form the basis for policy decisions such as lifting evacuation zones, decontamination, and other countermeasures. These surveys contain crucial findings regarding post-accident responses. This paper reviews the survey methods of government projects and current situation around the FDNPS. The visualization methods and databases of ambient dose rates are also reviewed to provide information to the population.