Femoral Tunnel Positioner for Arthroscopic Anterior Cruciate Ligament Reconstruction

Abstract

The invention discloses a femoral tunnel locator for arthroscopic anterior cruciate ligament reconstruction. Femoral tunnels of a patient are located according to preoperatively measured distances and angles among femoral physiological mark points and the femoral tunnels required to be constructed. The femoral tunnel locator comprises a main rod. A guide hook is arranged at the front end of the main rod, a slide rod capable of sliding along the length direction of the main rod is mounted on the main rod, and a pair of lower swing arms is movably mounted at the front end of the slide rod; the lower swing arms are movably connected with a pair of upper swing arm scales which are movably mounted on the main rod, so that a quadrilateral structure can be formed; the slide rod can move, so that the shape of the quadrilateral structure can be adjusted, and an angle can be formed between the upper swing arm scales, and the distances can be read via the upper swing arm scales. The femoral tunnel locator has the advantages that the shape and the size of the femoral tunnel locator can meet spatial requirements of an arthroscopic operative incision and a joint cavity of the patient, and the femoral tunnel locator can enter narrow spaces of the operative incision and the joint cavity of the patient while other tools cannot enter the narrow spaces; the femoral tunnels of the patient can be located according to the angles and the distances at one step, and accordingly injury to the soft tissues of the patient due to the fact that an existing instrument needs to enter the operative incision repeatedly can be prevented.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a femoral tunnel positioner used for arthroscopic reconstruction of the anterior cruciate ligament. Background technique [0002] Anterior cruciate ligament injury is relatively common in knee joint sports injuries. After the injury, joint instability, ligament laxity, secondary cartilage injury degeneration, traumatic arthritis and other knee joint diseases often occur. Therefore, reconstruction of the damaged anterior cruciate ligament to restore the stability and function of the knee joint has received more and more attention from clinicians. With the development of medical technology, arthroscopic reconstruction of the anterior cruciate ligament has become an important method for the treatment of ACL (ie, anterior cruciate ligament) injuries. However, cases of ACL reconstruction failure and revision are not uncommon, mainly due to incorrect positioning of...

AI Technical Summary

Problems solved by technology

However, it ignores the individual differences in the position of the patient's anterior cruciate ligament, so it is impossible to accurately locate the position of the tunnel, leading to the failure of the operation

With the emergence of dual-source CT technology, we can more clearly observe the imprint of the insertion point of the anterior cruciate ligament on the CT film, and we can use a physiological marker point on the femur to measure the distance and angle from this point to the imprint, Therefore, the position of the femoral tunnel of the anterior cruciate ligament can be precisely located before operation, but when creating the femoral tunnel in arthroscopic surgery, we do not have a tool or alternative technology that can complete the establishment of the tunnel based on the preoperative measurement data, so we need one that can Positioning device used in arthroscopic minimally invasive surgery and in tight spaces of the knee joint

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