Conformable, Stretchable Sensor To Record Bladder
Wall Stretch
Posted on 2019-01-24 - 09:13
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, Stuart; Brige, Pauline; Ravichandran, Aravind; Ramuz, Marc (2019). Conformable, Stretchable Sensor To Record Bladder
Wall Stretch. ACS Publications. Collection. https://doi.org/10.1021/acsomega.8b02609
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AUTHORS (4)
SH
Stuart Hannah
PB
Pauline Brige
AR
Aravind Ravichandran
MR
Marc Ramuz
KEYWORDS
stretchable electronicspolyurethane substratesensor displayssensor length100 cyclesbiocompatible strain sensorbiocompatible hydrogelStretchable Sensorsensor performancetreatment options50 μ mmonitoring bladder stretchRecord Bladder Wall Stretchurological conditionsresistive-based strain sensorsstretch changesvolume noninvasively