A positioning device for medial patellofemoral ligament reconstruction surgery

By designing a positioning device for patellofemoral ligament reconstruction surgery, using a gear transmission system for fixed and mobile components to accurately locate the specific position of the proximal end of the patella, the problem of inaccurate positioning in the prior art is solved, reducing the risk of surgery and improving surgical efficiency.

CN118948374BActive Publication Date: 2025-08-26AFFILIATED HUSN HOSPITAL OF FUDAN UNIV +1
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Patent Information

Application Number
CN202411159738.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-22
Publication Date
2025-08-26
Estimated Expiration
2044-08-22

AI Technical Summary

Technical Problem

The lack of positioning equipment in the prior art that can accurately locate the proximal third and half of the patella simultaneously, resulting in inaccurate positioning of bone tunnels in patellofemoral ligament reconstruction surgery, increasing surgical risks and complications.

Method used

A positioning device for medial patellofemoral ligament reconstruction surgery is designed, including a fixing component and a movable component. The two ends of the patella are clamped by the fixed end positioning claw and the movable end positioning claw. The first positioning arm and the second positioning arm are moved in a preset direction using a gear transmission system to accurately locate one-third and one-half positions of the proximal end of the patella.

Benefits of technology

It improves the accuracy of bone tunnel establishment, reduces surgical risks, and improves doctors' surgical experience and work efficiency.

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Abstract

The present invention provides a positioning device for medial patellofemoral ligament reconstruction surgery, which relates to the technical field of patellar dislocation treatment. It includes a fixed component and a movable component that moves along a first direction relative to the fixed component, the fixed component is provided with a fixed end positioning claw, and the movable component is provided with a movable end positioning claw, the fixed end positioning claw and the movable end positioning claw are arranged relative to each other and are configured to be clamped at both ends of the patella; the movable component also includes a first positioning arm and a second positioning arm that are transmission-connected to the fixed component and can move along the first direction, and the first positioning arm and the second positioning arm are both provided with positioning holes; wherein, the first positioning arm and the second positioning arm are configured to follow the movable component to move along the first direction, and to position the proximal preset position of the patella through the positioning hole. It can accurately locate the preset position of the proximal end of the patella, ensure the accuracy of the subsequent establishment of the bone tunnel, improve the doctor's surgical experience, improve the doctor's work efficiency, and reduce surgical risks.
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