Fabrication of a Textile-Based Wearable Blood Leakage Sensor Using Screen-Offset Printing

Author： Nomura Ken-ichi Horii Yoshinori Kanazawa Shusuke Kusaka Yasuyuki Ushijima Hirobumi

Publisher： MDPI

E-ISSN： 1424-8220|18|1|240-240

ISSN： 1424-8220

Source： Sensors, Vol.18, Iss.1, 2018-01, pp. : 240-240

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Abstract

We fabricate a wearable blood leakage sensor on a cotton textile by combining two newly developed techniques. First, we employ a screen-offset printing technique that avoids blurring, short circuiting between adjacent conductive patterns, and electrode fracturing to form an interdigitated electrode structure for the sensor on a textile. Furthermore, we develop a scheme to distinguish blood from other substances by utilizing the specific dielectric dispersion of blood observed in the sub-megahertz frequency range. The sensor can detect blood volumes as low as 15 μL, which is significantly lower than those of commercially available products (which can detect approximately 1 mL of blood) and comparable to a recently reported value of approximately 10 μL. In this study, we merge two technologies to develop a more practical skin-friendly sensor that can be applied for safe, stress-free blood leakage monitoring during hemodialysis.