An intramedullary nail with adjustable curvature

By designing a universal ball joint structure and traction linkage components, the spatial curvature adjustment and shape locking of the intramedullary nail are achieved, solving the problem of adapting the existing intramedullary nail to irregular bones, simplifying the operation process, and improving fixation stability and safety.

CN122398435APending Publication Date: 2026-07-17TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
Filing Date
2026-06-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing intramedullary nails cannot achieve 360° spatial curvature adjustment, making it difficult to adapt to the physiological curvature of irregular bones. Furthermore, the adjustment and locking operations are cumbersome, increasing the difficulty of surgery and the risk of complications.

Method used

An adjustable-curvature intramedullary nail is used, and the spatial curvature adjustment and shape locking of the intramedullary nail are achieved through a universal ball joint structure and traction linkage component. The shape locking component and the traction linkage component are integrated to form a linkage, simplifying the operation process.

Benefits of technology

It achieves precise fit between the intramedullary nail and irregular bone, reduces fracture reduction deviation and postoperative complication risk, simplifies surgical procedures, and improves fixation stability and safety.

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Abstract

本发明涉及医疗器械技术领域,具体涉及一种曲度可调的髓内钉,包括中空的主钉体、分别设于主钉体两端的锚定部与固定座,主钉体安装有若干节曲度调节单元、牵引联动组件和形态锁定组件;曲度调节单元同轴套设于主钉体外侧,相邻曲度调节单元之间安装有万向球铰接结构,主钉体内部开设有与牵引联动组件适配的轴向穿线通道,牵引联动组件穿设于轴向穿线通道内,且牵引联动组件的两端分别与锚定部和固定座传动连接;形态锁定组件集成于主钉体与曲度调节单元的铰接界面处,且形态锁定组件与牵引联动组件形成联动触发关系。本发明实现髓内钉的空间曲度精准调节与调节后形态的刚性锁定。
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