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Dynamic knee balancer with opposing adjustment mechanism

  • US 7,837,691 B2
  • Filed: 06/09/2005
  • Issued: 11/23/2010
  • Est. Priority Date: 02/06/2004
  • Status: Active Grant
First Claim
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1. A device for performing a minimally invasive procedure on a knee, the device comprising a femoral assembly engageable with a distal femur, the femoral assembly comprising:

  • a stationary femoral member removably attachable to a distal femur;

    an adjustable femoral member movably coupled with the stationary member to adjust tension in at least one ligament of or adjacent the knee, the adjustable femoral member including a medial portion and a lateral portion and at least one positioning feature that moves relative to the distal femur as the adjustable femoral member is adjusted and thus identifies at least one position on the distal femur for facilitating completion of the surgical procedure to enhance at least one of range of motion, stability or patella tracking of the knee, wherein the adjustable femoral member is configured to be movably couplable with a tibial member engaged with a proximal tibia to allow the knee to be moved through a range of motion without removing the femoral and tibial members; and

    an adjustment mechanism coupled to the femoral assembly, the mechanism including an actuator, the actuator positioned proximate the medial or the lateral portion of the adjustable femoral member, the actuator configured to adjust an opposite portion of the adjustable member to adjust tension in the at least one ligament, wherein the stationary member and the adjustable member are pivotally coupled.

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