THE DEVICE FOR DETECTING AND FOLLOWING UP A COMPLETE OR PARTIAL ANTERIOR CRUCIATE LIGAMENT INJURY BY MEANS OF COMPARING THE TWO LIMBS
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Abstract
The aim of the invention is to make improvements to the “GNRB®” device for detecting and following up an ACL injury, one improvement comprising a system for positioning the knee at a flexion of 20° to 90°, characterized by two separate seat portions which are pivotable relative to one another (300 and 400) and by a system for measuring the angle of the pivotal movement, and another improvement comprising a foot-supporting assembly (200), characterized by two portions, one of which is movable relative to the other on a shaft of a rotation sensor (204). The device according to the invention enables the seat of the ACL injury to be identified in the event of a partial tear (PL bundle or AM bundle) and enables the rotational instability of the knee to be measured during the translational movement of the tibia relative to the femur.
14 Citations
21 Claims
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1-9. -9. (canceled)
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10. A device for detecting and following up a lesion of the anterior cruciate ligament (ACL) of the knee including rupture, partial tear, lesion of one of the two LCA bundles, the PL (posterolateral) or the AM (anteromedial) or of the ligamentoplasties of the ACL of the knee, by measuring an anterior translation of the tibia relative to the femur with different knee flexions, and by measuring the automatic rotation of the knee induced by this anterior translational movement of the tibia relative to the femur, wherein it comprises a measuring device, with a support for the lower limb to which the limb of the patient is fastened at knee and ankle level, comprising a thrust means for the posterosuperior face of the calf and a tibia displacement sensor to be positioned on the anterosuperior face of the tibia, on the ATT (anterior tibial tuberosity), fastened onto an examination table incorporating means for positioning the knee with 0°
- to 90°
flexion enabling the measuring device to measure the condition of the lesions of the posterolateral and anteromedial bundles of the ACL, also comprising measuring means, positioned at the level of the lower segment of the limb being tested, for measuring the automatic rotation of the knee induced by the anterior translational movement of the tibia relative to the femur provoked by the measuring device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- to 90°
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19. The method for detecting and following up a lesion of the anterior cruciate ligament (ACL) of the knee of a lower limb of a patient, including rupture, partial tear, lesion of one of the two LCA bundles, the PL (posterolateral) or the AM (anteromedial) or of the ligamentoplasties of the ACL of the knee, by measuring an anterior translation of the tibia relative to the femur with different knee flexions, and by measuring the automatic rotation of the knee induced by this anterior translational movement of the tibia relative to the femur, wherein it comprises the steps of:
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fastening with a support the lower limb of the patient having a calf, at knee and ankle level, thrusting the posterosuperior face of the calf, measuring by a measuring device a tibia displacement with a sensor positioned on the anterosuperior face of the tibia, on the ATT (anterior tibial tuberosity), positioning the knee of the patient with a flexion at an angle comprised between 0° and
90°
, and measuring the condition of the lesions of the posterolateral and anteromedial bundles of the ACL at such angle by measuring via means positioned at the level of the lower segment of the limb being tested, the automatic rotation of the knee induced by the anterior translational movement of the tibia relative to the femur provoked by the thrusting of the calf. - View Dependent Claims (20, 21)
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Specification