Patent ID: 8956316
Filing Date: 2015-02-17
Classification: A61F

Abstract:
1. A knee orthosis for anterior cruciate ligament tears comprising an articulated framework adapted to be fixed to a thigh and lower leg, on either side of the knee, when worn, restraint straps attached to said framework, each restraint strap adapted to surround both the thigh and lower leg leaving a patellar area free and crossing and superimposing on each other on a posterior side in a vicinity of the popliteal fossa at a level of center of rotation of the knee in order to avoid an anterior part of a tibia sliding forward, each strap being held on the lower leg and thigh by a respective rigid guide of the framework, while where the straps cross in the vicinity of the popliteal fossa, the straps are held together by a non stretching sleeve, a first shortest strap of said restraint straps being on an outside, as posteriorly as possible and a last longest strap of said restraint straps being on an inside, as far forward as possible and closest to skin of the popliteal fossa, wherein the first strap is adapted to be positioned on the lower leg and relative to the center of rotation of the knee, at an equal distance (d/2) from a tibial plateau and an anterior tibial tuberosity and, on the thigh, approximately at a first distance (d) relative to the center of rotation of the knee, a posterior part of the rigid guide holding the first strap being positioned on the lower leg at an angle of approximately 65° to a tibial axis and, on the thigh, at an angle of approximately 72° to a femoral axis, and wherein a second strap of the restraint straps is adapted to be positioned on the thigh at approximately 4 times the first distance (d) of the first strap from the center of rotation of the knee and, on the lower leg, at approximately 1.5 times the first distance (d), a posterior part of the rigid guide of the second strap being positioned on the lower leg at an angle of approximately 48° to the tibial axis and on the thigh at an angle of approximately 40° to the femoral axis.