Work

Piezoresistor-Embedded Multifunctional Magnetic Microactuators for Implantable Self-Clearing Catheter

Year: 2018

Type: article

Abstract: Indwelling catheters are used widely in medicine to treat various chronic medical conditions. However, chronic implantation of catheters often leads to a premature failure due to biofilm accumulation. Previously, we reported on the development of a self-clearing catheter by integrating polymer-based microscale magnetic actuators. The microactuator provides an active anti-biofouling mechanism to disrupt and remove adsorbed biofilm on demand using an externally applied stimulus. During an in vivo evaluation of self-clearing catheter, we realized that it is important to periodically monitor the performance of implanted microactuators. Here, we integrate gold-based piezoresistive strain-gauge on our magnetic microactuators to directly monitor the device deflection with a good sensitivity (0.035%/Deg) and linear range (±30°). With the integrated strain-gauge, we demonstrate the multi-functional capabilities of our magnetic microactuators that enable device alignment, flow-rate measurement, and obstruction detection and removal toward the development of a chronically implantable self-clearing smart catheter.

Source: IEEE Sensors Journal

DOI: 10.1109/jsen.2018.2880576

Authors: Qi Yang, Albert Lee, R. Timothy Bentley, Hyowon Lee

Institutions: Purdue University West Lafayette, Indiana University Indianapolis

Language: English

Topic: Advanced MEMS and NEMS Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Good health and well-being

Open Access status: green

Funders: Indiana Clinical and Translational Sciences Institute, National Institutes of Health, National Institute of Neurological Disorders and Stroke, National Center for Advancing Translational Sciences