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Multifunctional ferromagnetic fiber robots for navigation, sensing, and treatment in minimally invasive surgery

Zhang, Y.; Wu, X.; Vadlamani, R. A.; Lim, Y.; Kim, J.; David, K.; Gilbert, E.; Li, Y.; Wang, R.; Jiang, S.; Wang, A.; Sontheimer, H.; English, D.; Emori, S.; Davalos, R. V.; Poelzing, S.; Jia, X.

2023-01-30 bioengineering
10.1101/2023.01.27.525973 bioRxiv
Show abstract

Small-scale robots capable of remote active steering and navigation offer great potential for biomedical applications. However, the current design and manufacturing procedure impede their miniaturization and integration of various diagnostic and therapeutic functionalities. Here, we present a robotic fiber platform for integrating navigation, sensing, and therapeutic functions at a submillimeter scale. These fiber robots consist of ferromagnetic, electrical, optical, and microfluidic components, fabricated with a thermal drawing process. Under magnetic actuation, they can navigate through complex and constrained environments, such as artificial vessels and brain phantoms. Moreover, we utilize Langendorff mouse hearts model, glioblastoma microplatforms, and in vivo mouse models to demonstrate the capabilities of sensing electrophysiology signals and performing localized treatment. Additionally, we demonstrate that the fiber robots can serve as endoscopes with embedded waveguides. These fiber robots provide a versatile platform for targeted multimodal detection and treatment at hard-to-reach locations in a minimally invasive and remotely controllable manner.

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