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Development of a force amplitude- and location-sensing device designed to improve the ligament balancing procedure in TKA.

Crottet, Denis
Bleuler, Hannes
Nolte, Lutz P
Pappas, Ion P
Published in IEEE Transactions on Biomedical Engineering. 2005, vol. 52, no. 9, p. 1609-11
Abstract To improve the ligament balancing procedure during total knee arthroplasty a force-sensing device to intraoperatively measure knee joint forces and moments has been developed. It consists of two sensitive plates, one for each condyle, a tibial base plate and a set of spaces to adapt the device thickness to the patient-specific tibiofemoral gap. Each sensitive plate is equipped with three deformable bridges instrumented with thick-film piezoresistive sensors, which allow accurate measurements of the amplitude and location of the tibiofemoral contact forces. The net varus-valgus moment is then computed to characterize the ligamentous imbalance. The developed device has a measurement range of 0-500 N and an intrinsic accuracy of 0.5% full scale. Experimental trials on a plastic knee joint model and on a cadaver specimen demonstrated the proper function of the device in situ. The results obtained indicated that the novel force-sensing device has an appropriate range of measurement and a strong potential to offer useful quantitative information and effective assistance during the ligament balancing procedure in total knee arthroplasty.
Keywords Arthroplasty, Replacement, Knee/instrumentation/methodsCadaverComputer SimulationComputer-Aided DesignEquipment DesignEquipment Failure AnalysisHumansKnee Joint/physiopathology/surgeryLigaments/physiopathology/surgeryModels, BiologicalProsthesis Fitting/instrumentation/methodsStress, MechanicalTransducers, Pressure
PMID: 16189974
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Research group Chirurgie orthopédique et traumatologique (98)
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CROTTET, Denis et al. Development of a force amplitude- and location-sensing device designed to improve the ligament balancing procedure in TKA. In: IEEE Transactions on Biomedical Engineering, 2005, vol. 52, n° 9, p. 1609-11. doi: 10.1109/TBME.2005.851504 https://archive-ouverte.unige.ch/unige:39729

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Deposited on : 2014-08-25

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