US Patent No. 9,538,953

DEVICE AND METHOD FOR DETERMINING FORCE OF A KNEE JOINT


Patent No. 9,538,953
Issue Date January 10, 2017
Title Device And Method For Determining Force Of A Knee Joint
Inventorship Jason T. Sherman, Warsaw, IN (US)
Michael J. Rock, Leeds (GB)
Marc E. Ruhling, Goshen, IN (US)
Assignee DEPUY IRELAND UNLIMITED COMPANY, Cork (IE)

Claim of US Patent No. 9,538,953

1. A joint distractor for distracting a patient's knee joint, the joint distractor comprising: a cradle extending in a longitudinal
direction, the cradle being configured to receive and secure a sensor module;
a first distractor component including a first body movably coupled to a first side of the cradle and a first tibial paddle
and a first femoral paddle that extend from the first body the longitudinal direction, the first tibial paddle being configured
to contact a tibial paddle of the sensor module when the sensor module is positioned in the cradle and the first femoral paddle
being configured to contact a distal end of a femur of a patient when the joint distractor is positioned in the patient's
knee joint between the patient's tibia and femur; the first femoral paddle being movable with respect to the first tibial
paddle to define a first displacement between the patient's tibia and femur; and

a second distractor component including a second body movably coupled to a second side of the cradle and a second tibial paddle
and a second femoral paddle that extend from the second body the longitudinal direction, the second tibial paddle being configured
to contact the tibial paddle of the sensor module when the sensor module is positioned in the cradle and the second femoral
paddle being configured to contact the distal end of the femur of the patient when the joint distractor is positioned in the
patient's knee joint between the patient's tibia and femur, the second femoral paddle being movable with respect to the second
tibial paddle to define a second displacement between the patient's tibia and femur;

wherein the first distractor component and the second distractor component are movable with respect to the cradle in the longitudinal
direction to permit selectively extending one of the distractor components beyond the other distractor component in the longitudinal
direction.