著者

本井 幸介 中村 心也 田中 直登 山越 憲一

出版者

Japanese Society for Medical and Biological Engineering = 日本生体医工学会

雑誌

生体医工学 = Transactions of Japanese Society for Medical and Biological Engineering : 日本エム・イー学会誌 (ISSN:1347443X)

巻号頁・発行日

vol.51, no.4, pp.268-275, 2013-08

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Recently, the freak accidents in home have been increased and they are caused by the asphyxiation, drowning, falling, fire, and toxicosis. Especially in bathroom, the accident frequently arise and thus the healthcare monitoring and the accident detection system can be useful for attainment of safe and untroubled daily life. While some monitoring systems for moving state using infrared ray and ultrasonic wave were already developed, these methods distinguish only whether or not a bather is moving. Also, detailed motion analysis using CCD camera has the problem of privacy for the practical use. From these viewpoints, we designed the monitoring system for the electrocardiogram and respiration signal using bathtub-installed electrodes, showing its usefulness for the healthcare and the drowning alarm during taking a bath. However, the range over which this method is possible is limited in the bathtub and thus the detection in washing place are impossible. To solve this drawback, we developed a new system capable of detecting the accident in the washing place together with the pulse and respiration rate using a bath mat type multipoint pressure sensor located in washing place of bathroom. From the results of the accuracy evaluation in 20 healthy subjects, it is demonstrated that the present system can accurately detect the accident [60/60, 100%] and show the good correlation between the pulse [r=0.99] and respiration [r=0.95] obtained from the system and those obtained from the conventional methods using the sensors attached to the body surface.

著者

山越 健弘 田中 直登 山越 康弘 松村 健太 ROLFE Peter 廣瀬 元 高橋 規一

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.48, no.5, pp.494-504, 2010-10-10 (Released:2011-05-27)

参考文献数

19

被引用文献数

1

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Motor racing athletes in the closed-cockpit category are always facing life-threatening situations caused by heat stroke, especially in hot weather. We report here the development of a novel infrared-radiation-type eardrum thermometer, with a built-in earphone, which can be used for continuous measurement in GT car racing. We examined the accuracy of the system for core body temperature monitoring in 10 healthy volunteers (21.8 ± 1.0 (S.D.) yrs) using a temperature controlled water bath. In addition, we assessed the usefulness of the system under real racing conditions with 2 professional drivers in the practice session of 2010 SUPER GT International Series Round 4 MALAYSIA being held at the Sepang International Circuit. To examine accuracy two thermistor probes, one inserted into the ear canal and the other beneath the tongue, were used for measurements of eardrum and sublingual temperatures respectively. An infrared eardrum thermometer was inserted into the contra-lateral ear canal. The measured temperatures were recorded at 30-s intervals. The results showed good correlation between the infrared eardrum temperature and both the direct eardrumtem temperature (r = 0.994, n = 1119, p < 0.001) and the sublingual temperature (r = 0.972, n = 1119, p < 0.001). The mean difference between these temperatures was + 0.09 °C, - 0.08 °C, and 1.96 S.D. was 0.21 °C, 0.44 °C, respectively. As for the field test, the system functioned satisfactorily during real racing conditions performed on the racing circuit. These results suggest that our new system can be used in a race setting as a reliable core temperature monitor and could help to improve safety of motor sports.

著者

本井 幸介 中村 心也 田中 直登 山越 憲一

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.51, no.4, pp.268-275, 2013-08-10 (Released:2013-12-11)

参考文献数

25

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Recently, the freak accidents in home have been increased and they are caused by the asphyxiation, drowning, falling, fire, and toxicosis. Especially in bathroom, the accident frequently arise and thus the healthcare monitoring and the accident detection system can be useful for attainment of safe and untroubled daily life. While some monitoring systems for moving state using infrared ray and ultrasonic wave were already developed, these methods distinguish only whether or not a bather is moving. Also, detailed motion analysis using CCD camera has the problem of privacy for the practical use. From these viewpoints, we designed the monitoring system for the electrocardiogram and respiration signal using bathtub-installed electrodes, showing its usefulness for the healthcare and the drowning alarm during taking a bath. However, the range over which this method is possible is limited in the bathtub and thus the detection in washing place are impossible. To solve this drawback, we developed a new system capable of detecting the accident in the washing place together with the pulse and respiration rate using a bath mat type multipoint pressure sensor located in washing place of bathroom. From the results of the accuracy evaluation in 20 healthy subjects, it is demonstrated that the present system can accurately detect the accident [60/60, 100%]and show the good correlation between the pulse [r=0.99] and respiration [r=0.95]obtained from the system and those obtained from the conventional methods using the sensors attached to the body surface.