A ligament laxity telemetry system architecture for a knee replacement prosthesis

Cyril Lahuec (1, 2) , Matthieu Arzel (1, 2) , Manuel Gouriou (3) , François Gallée (4, 5)

1 Lab-STICC_TB_CACS_IAS
2 ELEC - Département Electronique
3 ITI - Département Image et Traitement Information
4 Lab-STICC_TB_MOM_DIM
5 MO - Département Micro-Ondes

In this paper the feasability of a novel instrumented orthopeadic implant for total knee replacement is studied. The system aims at providing an indication on the balance of the lateral ligaments. The measures will be used to estimate the wear out of the polyethylene part of the prothesis and will also facilitate the patient rehab. The data will be transmitted outside the body through an RF link. Unlike other instrumented implants, the system will be self-powered. Piezo ceramics will be used both as pressure sensors and as power generators. This implies that the measurement system must be ultra low power as the available power is less than 1.8$m$W. First simulation results are given for a 0.35$µ$m CMOS process.

Mots clés: Biomedical application; Integrated circuit; Mixed-signal IC

Domaines: Electronique

Cyril Lahuec, Matthieu Arzel, Manuel Gouriou, François Gallée. A ligament laxity telemetry system architecture for a knee replacement prosthesis. 2nd International Symposium on Applied Sciences in Biomedical and Communication Technologies, Nov 2009, Bratislava, Slovakia. pp.1 - 6. ⟨hal-01801574⟩