抄録
In this study, we report on a blood pressure pulse wave device with an extension mechanism for high-accuracy measurement. This device consists of a force sensor for blood pressure and the extension mechanism with a 2-axis force sensor. The sizes of the force sensor for blood pressure and the extension mechanism are 12×12 mm^2 and 10×10 mm^2, respectively. The pushing force and the extension force of skin extension can be measured by a 2-axis force sensor of the extension mechanism. We measured blood pressure pulse wave by the prototype device, and calculate the S/N ratio of blood pressure pulse wave. When the extension force is 23 kPa and the pushing force is 8.5 kPa, S/N ratio was improved by 43% compared to without the extension mechanism. Since the heterogeneous of the subcutaneous tissue was reduced by the extension mechanism, S/N ratio of blood pressure pulse wave increases.
