Transparent Wearable Sensor for Early Extravasation Detection

• Main Authors: Hsuan-Chin Lu, Ying-Chih Liao
• Format: Article
• Language: English
• Published: MDPI AG 2020-12-01
• Series: Proceedings
• Subjects: wearable sensor; electrical contact resistance; extravasation detection
• Online Access: https://www.mdpi.com/2504-3900/56/1/8

In this work, we present a wearable sensor patch for the early detection of extravasation by using a simple, direct printing process. Interdigitated electrodes are printed on a flexible film, which can be attached to skin. The electrodes are integrated with a top electrode to form a flexible pressure-sensing device utilizing an electrical contact resistance (ECR) variation mechanism. The detector possesses good sensitivity and a low detection limit for pressure variation. By adjusting the printing parameters, sensors of millimeter size can be fabricated and allow the potential for multiple detection points in a large area. In addition, by using silver nanowire inks, the sensor becomes nearly transparent to prevent patients’ panic. The possibility and feasibility of this device for early extravasation detection is also evaluated.