Toshikazu Shiga

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Because almost all nations have come into aging society, it has been much more important to provide systems approach on health care than ever. There are many studies on human body from the view points of diseases however health has not been clearly defined. It would be difficult to clarify the notion of health because of various concepts of values and some(More)
This report describes an electrocardiograph (ECG) processor for use with a wearable healthcare system. It comprises an analog front end, a 12-bit ADC, a robust Instantaneous Heart Rate (IHR) monitor, a 32-bit Cortex-M0 core, and 64 Kbyte Ferroelectric Random Access Memory (FeRAM). The IHR monitor uses a short-term autocorrelation (STAC) algorithm to improve(More)
The method of bioelectrical impedance-based visceral fat estimation is in advance of other methods such as X-ray CT or MRI from the point views of cost and safety. However, it requires complex and diversity signal analysis and modeling to realize its high estimation accuracy. In response to this requirement, complication of feature attributes and(More)
The article proposes the new notion of Systems Health Care which is systems approach for more effective and efficient health care. Recent developments of sensor, information, and communication technology have been realizing powerful and evidence-based solution using low invasive and continuous measurements of life style habits and vital signs. The measured(More)
BACKGROUND Reducing the urinary sodium-to-potassium ratio is important for reducing both blood pressure and risk of cardiovascular disease. Among free-living Japanese individuals, we carried out a randomized trial to clarify the effect of lifestyle modification for lowering urinary sodium-to-potassium ratio using a self-monitoring device. METHODS This was(More)
The importance of measuring vital signs and life style activities in ordinary life besides in medical field has been realized more and more. This is because the affect of life style disease in super aging society has been strongly associated with long term nursing care. Additionally, sensing and information technology has been developed for realizing ease(More)
To prevent lifestyle diseases, wearable bio-signal monitoring systems for daily life monitoring have attracted attention. Wearable systems have strict size and weight constraints, which impose significant limitations of the battery capacity and the signal-to-noise ratio of bio-signals. This report describes an electrocardiograph (ECG) processor for use with(More)
The aim of this study was to examine the effects of the sitting posture on the lower limb venous flow and to explore the beneficial effects of neuromuscular electrical stimulation (NMES) and an ottoman-type seat on the venous flow. Healthy adult volunteers without a history of lower limb surgery or thromboembolism were recruited, and the flow velocity,(More)
Lifestyle diseases are strongly associated with lifestyle disease and the serious case of cardiovascular events which are main causes of long term nursing care. They would have strong impacts on the coming super aging society. In response to the problems to be solved, the notion technology of Systems Health Care and its technology have been proposed and(More)