Conformable, stretchable sensor to record bladder wall stretch

Hannah, Stuart and Brige, Pauline and Ravichandran, Aravind and Ramuz, Marc (2019) Conformable, stretchable sensor to record bladder wall stretch. ACS Omega, 4 (1). 1907–1915. ISSN 2470-1343

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    Abstract

    A soft, conformable, biocompatible strain sensor based on ultra-thin stretchable electronics is reported. The sensor comprises gold thin films patterned on a 50 μm thick polyurethane substrate to produce resistive-based strain sensors for monitoring bladder stretch. The sensor responds linearly as a function of strain from 0 to 50%, with an increasing sensitivity as a function of sensor length. The sensor displays good stability with very little hysteresis when it is subjected to cycling between 0 and a maximum strain of 50%, with the largest deviation between 0 and 50% strain of ∼19% after 100 cycles attributed to the sensor with the longest length (6 mm) because it physically stretches by a greater distance than sensors with a shorter length. “Breaking” tests on the sensor reveal that shorter sensors can withstand higher maximum strains than longer sensors. A biocompatible hydrogel adhesive is used to attach sensors in vitro to the outside wall of a pig’s bladder, and sensor performance is studied with respect to repeated bladder filling and emptying to investigate stretch changes. By monitoring bladder stretch and thus volume noninvasively, the sensor provides a route for developing new treatment options for various urological conditions.

    Author(s):Hannah, Stuart ORCID logoORCID: https://orcid.org/0000-0001-5620-9899, Brige, Pauline, Ravichandran, Aravind and Ramuz, Marc
    Item type:Article
    ID code:66804
    Notes:This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
    Keywords:biosensors, electrochemistry, hydrogels, mechanical properties, ployurethanes, thin films, Bioengineering, Biomedical Engineering
    Subjects:Technology > Engineering (General). Civil engineering (General) > Bioengineering
    Department:Faculty of Engineering > Biomedical Engineering
    Depositing user: Pure Administrator
    Date deposited:04 Feb 2019 16:24
    Last modified:11 Jan 2020 05:13
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/66804
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