GNRB (Prod 160215)






About GNRB (Prod 160215)

A revolution in instrumental techniques for the measurement of knee joint laxity. The GNRB is a device that measures the sagittal translation of the tibia at 20° of flexion to reproduce the Lachman position. The leg rests on a thermoformed shell that can be adapted to the length of each patient’s leg; the foot is held at a rotation of 0°. An electric pressure pad exerts several levels of pressure on the calf, at the examiner’s discretion beteween 0 and 300N. Surface electrodes applied to the posterior surface of the thigh ensure that there is no hamstring muscle activity for the knee being tested (feedback effect). A motion sensor (precise to 0.1 mm) records the anterior drawer shift of the anterior tuberosity of the tibia in relation to the femur. The drawer shift for each pressure level chosen and the shift / pressure curve are recorded on a connected PC. Each patient has his own file in which laxity measurements are recorded, as are the specific testing conditions: the tightening force on the thigh, the level of pressure exerted and the results (shift / pressure curves, extension, stiffness). The system is controlled by a microcalculator that ensures the consistency and precision of the measurements. Comparison tests are performed on each knee while the patient lies on a standard examining table.
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