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Knee ligament testing device and method of use

  • US 4,969,471 A
  • Filed: 01/09/1989
  • Issued: 11/13/1990
  • Est. Priority Date: 01/09/1989
  • Status: Expired due to Fees
First Claim
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1. A device for measuring displacement of the tibia with respect to the patella in response to an applied force on the tibia which comprises:

  • an elongated first reference arm having a distal end and a proximal end;

    a second reference arm having a distal end pivotally engaged to said distal end of said first reference arm, a proximal end, and means attached to said proximal end for stationarily resting said proximal end on the patella;

    a shaft fixedly attached to said proximal end of said first reference arm and oriented substantially perpendicular to the longitudinal axis of said first reference arm;

    a mount slidingly engaged with said shaft;

    a paddle attached to said mount, said paddle comprising means for resting said paddle on the tibia;

    means for generating a first signal proportional to the angled relationship between said first reference arm and said second reference arm; and

    means for generating a second signal indicative of the position of said mount relative to said first reference arm.

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