Femur tunnel shifting disk type locator for anterior cruciate ligament reconstruction under arthroscope

Abstract

The invention discloses a femur tunnel shifting disk type locator for anterior cruciate ligament reconstruction under an arthroscope. A femur tunnel is located according to the distance and angle between a femur physiological mark point measured before surgery and the position of a femur tunnel which needs establishing. The locator comprises an axis hook rod, a fixing portion, an outwards-rotating shifting disk set and an inwards-rotating shifting disk set, wherein the front end of the axis hook rod is provided with a hook, the fixing portion is used for fixing the axis hook rod, and the outwards-rotating shifting disk set and the inwards-rotating shifting disk set are coaxially mounted on the axis hook rod in a sleeved mode. The inwards-rotating shifting disk set is provided with a pointer. The outwards-rotating shifting disk set is provided with a hollow drill bit guide rod. The pointer and the drill bit guide rod are both parallel to the axis hook rod. The distance between the axis of the drill bit guide rod and the axis of the axis hook rod is equal to the distance between the femur physiological mark point measured before surgery and the position of the femur tunnel which needs establishing. The hook is hooked to the physiological mark point, the inwards-rotating shifting disk set is moved axially to make the pointer point to the top line of femur fossa intercondyloidea, and the outwards-rotating shifting disk set is rotated so that the angle between the inwards-rotating shifting disk set and the outwards-rotating shifting disk set can be equal to the angle between the femur physiological mark point measured before surgery and the position of the femur tunnel which needs establishing.. The femur tunnel shifting disk type locator meets the actual demand for locating according to the angle and distance in anterior cruciate ligament reconstruction surgery, and increases the success rate of the surgery.

Description

technical field [0001] The invention belongs to the technical field of medical devices and relates to a femoral tunnel positioning device for anterior cruciate ligament reconstruction under arthroscopy. 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 the bone tunn...

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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