Evaluation of Piezoresistive Polymer-based Traces for Non-invasive Sensor Patch

Evaluation of Piezoresistive Polymer-based Traces for Non-invasive Sensor Patch

2018 IEEE 20th Electronics Packaging Technology Conference (EPTC)

DOI:10.1109/eptc.2018.8654338

http://dx.doi.org/10.1109/eptc.2018.8654338

Maria Ramona Ninfa Bautista Damalerio, Ruiqi Lim, Weiguo Chen, David Sze Wai Choong, Ming-Yuan Cheng

Gold , Polymers , Sensitivity , Skin , Carbon , Piezoresistance , Curing

18 March 2019

Damalerio, R. B., Lim, R., Chen, W., Choong, D. S. W., & Cheng, M.-Y. (2018). Evaluation of Piezoresistive Polymer-based Traces for Non-invasive Sensor Patch. 2018 IEEE 20th Electronics Packaging Technology Conference (EPTC), 55–58. https://doi.org/10.1109/eptc.2018.8654338

In this paper, we shall discuss the suitable alternative material to gold for creating traces or electrodes of a noninvasive flexible sensor patch that is used for detecting early extravasation during intravenous cannulation. The samples were prepared by printing 5 μm- to 10 μm-thin piezoresistive polymer-based Carbon paste on a base polymer patch, also called the adhesive film. The first samples have the traces embedded in between two base adhesive films. The sensitivity of the samples was characterized by using a pressure chamber/ jig with 4 cm hole to mimic an extravasation by bump formation when pumped with compressed dry air (CDA) that is connected to a 15 psi source. The sensitivity value obtained was 20% up to 23% at 0.16 psi. After optimization of the curing temperature of the adhesive film and piezoresistive polymer-based Carbon traces, ex-vivo test was conducted with the prototype sample placed on the cannulation site of a pork front hock. At 2 ml and 5 ml infused fluid, the sensitivity obtained is only 1.1% and 2.44%, respectively. The overall prototype dimension of all samples is 6 x 7 cm2. The second samples were prepared with narrower trace width and spacing than the first samples. Sensitivity obtained from the second sample at 0.16 psi increased to 50% up to 79%. The third samples were prepared with the same narrow trace with as the second sample, but this time the piezoresistive polymer-based traces were not embedded in two adhesive films, making the sample a single layer patch only. Sensitivity obtained at 0.16 psi increased further to 140% up to 200%. The 0.16 psi readout is based on previous data that at this pressure induced in the 4 mm hole where the adhesive film is placed over, it translates to 3mm bump height at 2ml infused volume on the skin. The results suggest a strong potential in the development of the piezoresistive polymer-based Carbon traces for flexible non-invasive sensor patch for early extravasation detection

Publisher Copyright

This research / project is supported by the Agency for Science, Technology and Research - Exploit Technologies (ETPL)
Grant Reference no. : ETPL/18-GAP003-R20H

© 2019 IEEE.  Personal use of this material is permitted.  Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

https://oar.a-star.edu.sg/communities-collections/articles/21169

978-1-5386-7668-4

Institute of Microelectronics