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Published August 8, 2018 | Accepted Version + Supplemental Material
Journal Article Open

Flexible-Device Injector with a Microflap Array for Subcutaneously Implanting Flexible Medical Electronics


Implantable electronics in soft and flexible forms can reduce undesired outcomes such as irritations and chronic damages to surrounding biological tissues due to the improved mechanical compatibility with soft tissues. However, the same mechanical flexibility also makes it difficult to insert such implants through the skin because of reduced stiffness. In this paper, a flexible‐device injector that enables the subcutaneous implantation of flexible medical electronics is reported. The injector consists of a customized blade at the tip and a microflap array which holds the flexible implant while the injector penetrates through soft tissues. The microflap array eliminates the need of additional materials such as adhesives that require an extended period to release a flexible medical electronic implant from an injector inside the skin. The mechanical properties of the injection system during the insertion process are experimentally characterized, and the injection of a flexible optical pulse sensor and electrocardiogram sensor is successfully demonstrated in vivo in live pig animal models to establish the practical feasibility of the concept.

Additional Information

© 2018 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. Manuscript received: 19 April 2018. Manuscript revised: 30 May 2018. Version of Record online: 25 June 2018. Issue Online: 08 August 2018. Funding Information: National Research Foundation of Korea. Grant Number: 2016R1A2B4012854. GIST‐Caltech Research Collaboration.

Attached Files

Accepted Version - nihms-1784489.pdf

Supplemental Material - adhm201800419-sup-0001-s1.mp4

Supplemental Material - adhm201800419-sup-0001-s1.pdf


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August 21, 2023
October 18, 2023