Knee joint anterior cruciate ligament femoral tunnel needle withdrawal direction guiding and positioning system

Abstract

The invention discloses a knee joint anterior cruciate ligament femoral tunnel needle withdrawal direction guiding and positioning system. The system comprises an arc-shaped positioner, a rotating block piece, a spring and a fastening screw rod, the arc-shaped positioner comprises an arc-shaped part, a horizontal kirschner wire channel is formed in the position, near the end face, of one end of the arc-shaped part, a clamping part is arranged on the other end face of the arc-shaped part, a positioning channel horizontally penetrating the whole clamping part and a vertically upward fastening screw through hole are formed in the lower end face of the clamping part, the axis of the positioning channel is in accordance with that of the kirschner wire channel, the fastening screw through hole is internally provided with a thread, and a center hole is formed in the center of the rotating block piece. The knee joint anterior cruciate ligament femoral tunnel needle withdrawal direction guiding and positioning system is simple in structure, convenient to use and capable of providing accurate femoral tunnel direction to doctors.

Description

technical field [0001] The invention belongs to the field of guidance and positioning system for the exit direction guidance and positioning system of the femoral tunnel of the anterior cruciate ligament of the knee joint, and specifically relates to a guidance positioning system for the exit direction of the femoral tunnel of the anterior cruciate ligament of the knee joint. Background technique [0002] The anterior cruciate ligament of the knee joint, referred to as the anterior cruciate ligament, refers to the dense connective tissue attached to the medial surface of the femoral condyle of the knee joint. A ligament formed by the depression in front of the intercondylar crest of the tibial plateau. There are blood vessels nourishing and nerve distribution at both ends of the femoral and tibial insertions. The main function is to control the abnormal forward movement and rotation of the tibia of the knee joint, and cooperate with other static and dynamic stabilization dev...

AI Technical Summary

Problems solved by technology

;When the femoral tunnel is established, the 2.4mm guide pin can be directly seen at the needle entry point, and the length of the guide pin in the inner and outer soft tissue structures of the femur is greater than 60mm, resulting in that the outer needle exit point after the guide pin enters the bone is completely dependent on the surgeon Judging by experience, the direction of the guide pin is prone to serious deviation, resulting in an uncontrollable direction of the tunnel. It is only possible to adjust a good direction through multiple drillings of the guide pin.

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