Device for Measuring Tibio-Femoral Force Amplitudes and Force Locations in Total Knee Arthroplasty
AssigneeSynthes USA, LLC
InventorsDenis Crottet, Ion Petros Pappas, Thomas Maeder, Caroline Jacq, Hannes Bleuler
Life of this patent
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Abstract
A probe used during a total knee arthroplasty for measuring forces and locations of their points of application and thereby moments includes two load sensitive plates t to be inserted in one joint-compartment of a knee joint each and each being provided with a top surface and a bottom surface. At least two load sensors may be situated on the top surfaces and/or the bottom surface of each load sensitive plate.
Claims21
1-16. (canceled)
A probe used during a total knee arthroplasty for measuring force amplitudes and force locations, comprising:
- first and second load sensitive plates connected to each other, each for insertion into a joint-compartment of a knee joint and each having a top surface and a bottom surface, wherein at least one of the first and second load sensitive plates measures the force amplitudes and force locations along two perpendicular axes, one of the axes being in a medio-lateral direction, and another of the axes being in a antero-posterior direction.
A probe used during a total knee arthroplasty for measuring force amplitudes and force locations, comprising:
- first and second load sensitive plates separated from one another at a gap between adjoining side walls thereof, the first and second plates being adapted for insertion into a joint-compartment of a knee joint, wherein each of the first and second load sensitive plates includes at least two load sensors, the at least two load sensors including at least two piezoresistive sensors arranged as a Wheatstone bridge.
Dependencies are inferred from the claim text.