Conformable, stretchable sensor to record bladder wall stretch

Stuart Hannah, Pauline Brige, Aravind Ravichandran, Marc Ramuz

Research output: Contribution to journalArticle

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.
LanguageEnglish
Pages1907–1915
Number of pages9
JournalACS Omega
Volume4
Issue number1
DOIs
Publication statusPublished - 24 Jan 2019

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Sensors
Polyurethanes
Monitoring
Hydrogel
Hydrogels
Gold
Hysteresis
Adhesives
Electronic equipment
Thin films
Substrates

Keywords

  • biosensors
  • electrochemistry
  • hydrogels
  • mechanical properties
  • ployurethanes
  • thin films

Cite this

Hannah, Stuart ; Brige, Pauline ; Ravichandran, Aravind ; Ramuz, Marc. / Conformable, stretchable sensor to record bladder wall stretch. In: ACS Omega. 2019 ; Vol. 4, No. 1. pp. 1907–1915.
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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.",
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Hannah, S, Brige, P, Ravichandran, A & Ramuz, M 2019, 'Conformable, stretchable sensor to record bladder wall stretch' ACS Omega, vol. 4, no. 1, pp. 1907–1915. https://doi.org/10.1021/acsomega.8b02609

Conformable, stretchable sensor to record bladder wall stretch. / Hannah, Stuart; Brige, Pauline; Ravichandran, Aravind; Ramuz, Marc.

In: ACS Omega, Vol. 4, No. 1, 24.01.2019, p. 1907–1915.

Research output: Contribution to journalArticle

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