著者

Abe Toshikazu Akiyama Shigeki Hatori Osamu

出版者

Elsevier

雑誌

Linear algebra and its applications (ISSN:00243795)

巻号頁・発行日

vol.439, no.1, pp.174-188, 2013-07

被引用文献数

9

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In this paper we describe all isometries on the special orthogonal group. As an application we give a form of spectrally multiplicative map on the special orthogonal group.

著者

Abe Toshikazu Ishimatsu Shinichi Tokuda Yasuharu

出版者

Public Library of Science

雑誌

PLoS ONE (ISSN:19326203)

巻号頁・発行日

vol.8, no.3, pp.e59738, 2013-03

被引用文献数

3

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IntroductionFew studies are available on the clinical characteristics of patients using emergency medical transports in Japan. In this study, we aimed to investigate reasons for emergency medical transports and their relation to clinical severity.MethodsWe conducted a 3-year population-based observational study of patients transported by ambulance to emergency departments (ED) in the capital of Japan, Tokyo, which has a population of about 13 million. Demographic data, reasons for transport, and the severity of initial assessment at ED were recorded. Logistic regression was used to determine the odds of the clinical severity of each reason for transport.ResultsThe number of emergency medical transports in the three-year study period was 1,832,637. Mean age was 53±26. Males were 976,142 (53%). Overall, 92% of all transported patients were in a mild or moderate medical state and patients with the 17 most frequent reasons for transport occupied 82% (1,506,017) of all transports. Pain was the most frequent reason for transport, followed by traffic accident. Considering all the patients and their reasons for transport, patients whose reason was pain or a traffic accident (29% of all patients) were in a relatively mild state compared with patients with other reasons for transport. Patients in an altered mental state in the prehospital setting (6.8% of all patients) were in a more severe medical state than other patients.ConclusionsIn Tokyo, Japan, 92% of transported patients were in a mild or moderate medical state. In particular, most patients from traffic accidents were in a mild state, even though traffic accidents were the second most frequent reason for transport. Patients in an altered mental state were most likely to be in a severe medical state.