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A long\u2010term implantable device that can attach onto an organ, sense its movement, and deliver current to modify the organ function would be useful in many therapeutic applications. The bladder, for example, can suffer from incomplete contractions that result in urinary retention with patients requiring catheterization. Those affected may benefit from a combination of a strain sensor and electrical stimulator to better control bladder emptying. The materials and design of such a device made from thin layer carbon nanotube (CNT) and Ecoflex 00\u201350 are described and demonstrate its function with in vivo feline bladders. During bench\u2010top characterization, the resistive and capacitive sensors exhibit stability throughout 5000 stretching cycles under physiology conditions. In vivo measurements with piezoresistive devices show a high correlation between sensor resistance and volume. Stimulation driven from platinum\u2010silicone composite electrodes successfully induce bladder contraction. A method for reliable connection and packaging of medical grade wire to the CNT device is also presented. This work is an important step toward the translation of low\u2010durometer elastomers, stretchable CNT percolation, and platinum\u2010silicone composite, which are ideal for large\u2010strain bioelectric applications to sense or modulate dynamic organ states.<\/jats:p>","DOI":"10.1002\/adhm.201900477","type":"journal-article","created":{"date-parts":[[2019,9,26]],"date-time":"2019-09-26T02:58:05Z","timestamp":1569466685000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Ultracompliant Carbon Nanotube Direct Bladder Device"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3688-2346","authenticated-orcid":false,"given":"Dongxiao","family":"Yan","sequence":"first","affiliation":[{"name":"Department of Electrical and Engineering and Computer Science University of Michigan  Ann Arbor MI 48109 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tim 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