Currently, the most common method for detecting prosthetic implant loosening is imaging. Unfortunately, imaging methods are imprecise in detecting the early signs of implant loosening. This paper describes a new wireless inductive proximity sensor system for detecting early implant loosening. The loosening of the implant is accurately detected by analyzing the electromagnetic field generated by the passive sensors located around the implant. The sensor system was modeled and simulated using COMSOL, and then tested experimentally. The inductive proximity sensor and the metallic implant form a coupled circuit is tuned to oscillate at a designed frequency. The circuit's integrated controller measures and records specific sensor's parameters such as resistance and inductance of the sensor that are directly related to the distance between the sensor system and the implant. A prototype has been developed and the results show that the designed proximity sensor is capable of measuring the loosening of the hip implant at [Formula: see text]m resolution at distances of less than [Formula: see text], and of [Formula: see text]m resolution at a distance of [Formula: see text]. Furthermore, there is a good correlation between the simulated and experimental results.
An implantable wireless inductive sensor system designed to monitor prosthesis motion in total joint replacement surgery
Mohammadbagherpoor, H., Ierymenko, P., Hegarty-Craver, M., Carlson, J. B., Dausch, D. E., Grant, E., & Lucey, J. (2020). An implantable wireless inductive sensor system designed to monitor prosthesis motion in total joint replacement surgery. IEEE Transactions on Biomedical Engineering, 67(6), 1718-1726. [8848443]. https://doi.org/10.1109/tbme.2019.2943808
Abstract
Publications Info
To contact an RTI author, request a report, or for additional information about publications by our experts, send us your request.
Meet the Experts
View All ExpertsRecent Publications
Article
The daily association between affect and alcohol use: A meta-analysis of individual participant data
Article
Protection of forest ecosystems in the eastern United States from elevated atmospheric deposition of sulfur and nitrogen
Article
The use of patient experience feedback in rehabilitation quality improvement and codesign activities
Article