CEA-Leti, a CEA microelectronics research institute, unveiled FollowKnee, a smart, integrated multi-sensor system for knee implants developed to help surgeons more accurately position the implant. The system integrates a deformation sensor, a pH sensor, a temperature sensor, and an accelerometer in a titanium tibial baseplate. The system’s pH and temperature sensors are designed to detect infection early, while the deformation sensor and accelerometer are intended to trigger an alert if they detect mechanical problems, such as loosening of the implant.

The system also features the first low-power deformation sensor in a biocompatible system with highly compact electronics powered via inductive coupling, CEA-Leti reported in a news release. 

“Accuracy is vital in knee-implant surgery,” explained Dr. Eric Stindel, an orthopedic surgeon at Brest Hospital, France, and a member of the project team, in the release. “By integrating the deformation sensor and the accelerometer, this innovative architecture gives both the surgeon and the patient peace of mind for a successful operation and follow-up.”

The technology supports rehabilitation by helping physiotherapists adapt therapy for knee-implant recipients. The solution may also be adapted for hip and shoulder replacements.

FollowKnee is a project financed by the French ANR program and involves 13 partners.