There is vigorous development in Healthcare terminals. It not only reduces much of medical resources, but also is more convenient for people to monitor their physical condition, so has met with a warm reception. However, all of the devices in the terminals are electronic. Some small factors have an impact on the measuring result, lead to more or less deviation even mistakes. The paper researches on the impact that physical posture acts on the precision and deduces the functional relations between postures and deviation. How to design the healthcare terminals and guide the user to measure in the comfort posture to get the more precise result is the topic of the paper. As the verification, a series of experiment based on the design from the paper is carried out. Experimental results show that 1) the user comfort can be gauged and evaluated by psycho-physiological (medical) measurement and 2) the comfort-gauged formulation works in the design methodology and 3) the design methodology is applicable in real designs.
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