Design, construction and validation of an electrical impedance probe with contact force and temperature sensors suitable for in-vivo measurements
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- dc.contributor.author Ruiz-Vargas, Albert
- dc.contributor.author Ivorra Cano, Antoni, 1974-
- dc.contributor.author Arkwright, John W.
- dc.date.accessioned 2021-03-15T08:14:11Z
- dc.date.available 2021-03-15T08:14:11Z
- dc.date.issued 2018
- dc.description.abstract Bioimpedance spectroscopy measurements can be used for tissue characterization. These measurements can be performed in soft tissues by direct contact of a non-invasive probe consisting of two or four electrodes. The amount of force applied by users can be quite different, and the measurements can vary as a result. To compensate for this, we have built an electrical impedance probe (diameter 3.2 mm) with fibre optic contact-force and temperature sensors built in it. The different sensors of the probe were tested individually. The errors in magnitude and phase angle of the probe are <0.9% and <4°, respectively, for a 0.9% NaCl solution. The linear dynamic range of the force sensor was from 0 to 100 grams. An ex-vivo experiment on a section of proximal colon from a guinea-pig was performed. Twenty bioimpedance measurements were taken in a frequency range of 5 kHz to 1 MHz, while simultaneously recording the force applied. For an increase in contact pressure applied to tissue from 0 to 15.4 kPa, the maximum change in resistivity was 33% at 5 kHz and the minimum was 6.6% at 142 kHz. The probe is small enough to be introduced via the instrument port of an endoscope.
- dc.description.sponsorship Mr. A. Ruiz-Vargas acknowledges Ms. Lauren Keightley and Dr. Reizal Mohd Rosli for their help with the experiment; Mr. Jon Lockwood from OneTemp Pty Ltd for supplying the authors with a 10 cm of platinum wire. The PEEK parts for the tip sensor were fabricated at the South Australian node of the Australian National Fabrication Facility under the National Collaborative Research Infrastructure Strategy.
- dc.format.mimetype application/pdf
- dc.identifier.citation Ruiz-Vargas A, Ivorra A, Arkwright JW. Design, construction and validation of an electrical impedance probe with contact force and temperature sensors suitable for in-vivo measurements. Sci Rep. 2018 Oct 4; 8(14818). DOI: 10.1038/s41598-018-33221-4
- dc.identifier.doi http://dx.doi.org/10.1038/s41598-018-33221-4
- dc.identifier.issn 2045-2322
- dc.identifier.uri http://hdl.handle.net/10230/46765
- dc.language.iso eng
- dc.publisher Nature Research
- dc.relation.ispartof Sci Rep. 2018 Oct 4; 8(14818): [11p.]
- dc.rights © The Author(s) 2018. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- dc.rights.accessRights info:eu-repo/semantics/openAccess
- dc.rights.uri http://creativecommons.org/licenses/by/4.0/
- dc.subject.keyword Bioimpedance Measurement
- dc.subject.keyword Fibre Bragg Gratings
- dc.subject.keyword Electrical Impedance Probe
- dc.subject.keyword Contact Force Sensor
- dc.subject.keyword Polyether Ether Ketone
- dc.title Design, construction and validation of an electrical impedance probe with contact force and temperature sensors suitable for in-vivo measurements
- dc.type info:eu-repo/semantics/article
- dc.type.version info:eu-repo/semantics/publishedVersion