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Department of Mechanical and Aerospace Engineering, Politecnico di Torino 10129, Italy


The development of personalized healthcare is rapidly growing thanks to the support of low-power electronics, advanced fabrication processes and secured data transmission protocols. Long-acting drug delivery systems able to sustain the release of therapeutics in a controllable manner can provide several advantages in the treatment of chronic diseases. Various systems under development control drug release from an implantable reservoir via concentration driven diffusion through nanofluidic membranes. Given the high drug concentration in the reservoir, an inward osmotic fluid transport occurs across the membrane, which counters the outward diffusion of drugs. The resulting osmotic pressure buildup may be sufficient to cause the failure of implants with associated risks to patients. Confidently assessing the osmotic pressure buildup requires testing in vivo. Here, using metal and polymer AM (additive manufacturing) processes, we designed and developed implantable drug reservoirs with embedded strain sensors to directly measure the osmotic pressure in drug delivery implants in vitro and in vivo.


Drug delivery devices, AM, design for additive manufacturing (DFAM), micro electro mechanical systems (MEMS), experimental mechanics.

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