Fully implantable wireless batteryless vascular electronics with printed soft sensors for multiplex sensing of hemodynamics

• Authors: Robert Herbert, Georgia Institute of Technology; Hyo-Ryoung Lim, Pukyong National University; Bruno Rigo, Georgia Institute of Technology; Woon-Hong Yeo, Emory University
• Journal Title: Science of Advanced Materials
• Volume: Volume 8, Number 19
• Publisher: American Scientific Publishers | 2022-05-11
• Type of Work: Article | Final Publisher PDF
• Publisher DOI: http://doi.org/10.1126/sciadv.abm1175
• Subjects: Engineering, Biomedical
• Keywords: multiplex sensing; hemodynamics

Abstract

The continuous monitoring of hemodynamics attainable with wireless implantable devices would improve the treatment of vascular diseases. However, demanding requirements of size, wireless operation, and compatibility with endovascular procedures have limited the development of vascular electronics. Here, we report an implantable, wireless vascular electronic system, consisting of a multimaterial inductive stent and printed soft sensors capable of real-time monitoring of arterial pressure, pulse rate, and flow without batteries or circuits. Developments in stent design achieve an enhanced wireless platform while matching conventional stent mechanics. The fully printed pressure sensors demonstrate fast response times, high durability, and sensing at small bending radii. The device is monitored via inductive coupling at communication distances notably larger than prior vascular sensors. The wireless electronic system is validated in artery models, while minimally invasive catheter implantation is demonstrated in an in vivo rabbit study. Overall, the vascular system offers an adaptable framework for comprehensive monitoring of hemodynamics.