Ulna tunnel positioner

By designing an adjustable ulnar bone tunnel locator, the problem of inaccurate positioning in existing technologies has been solved, achieving precise positioning of the bone tunnel and improving surgical efficiency.

CN224441404UActive Publication Date: 2026-07-03薛剑 +1
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Patent Information

Application Number
CN202520562497.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-27
Publication Date
2026-07-03
Estimated Expiration
2035-03-27

AI Technical Summary

Technical Problem

The existing ulnar positioning device has a fixed hand support hook, which makes it difficult to adjust to the optimal position in the narrow gap of the wrist joint, resulting in inaccurate bone tunnel positioning and increasing surgical error.

Method used

An ulnar bone tunnel locator was designed, comprising a guide body, a positioning body, and a locking fastener. Through the combination of a sliding rod and a positioning hook, the position of the positioning hook can be flexibly adjusted according to the anatomical structure of different patients, ensuring that the positioning hook hooks onto specific anatomical landmarks on the ulna and is fixed by the locking fastener, providing accurate bone tunnel positioning.

Benefits of technology

It improves the accuracy of bone tunnel positioning, reduces surgical errors, adapts to individual differences, and ensures the accuracy of drilling and surgical efficiency.

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Abstract

The ulna tunnel positioner comprises a guide body, a positioning body and a locking piece, the guide body comprises a holding rod, a first guide block and a second guide block, the first guide block is arranged at one end of the holding rod, a first guide hole is formed in the first guide block, the second guide block is arranged in the middle of the holding rod, a second guide hole is formed in the second guide block, and the locking piece is arranged on the positioning body. The positioning body comprises a sliding rod and a positioning hook, the positioning hook is arranged at one end of the sliding rod, the sliding rod penetrates through the first guide hole so that the end, away from the sliding rod, of the positioning hook can be located on the extension line of the axis of the second guide hole, and the locking piece is in threaded connection with the end, close to the first guide hole, of the holding rod and used for abutting against the sliding rod. Thus, the sliding rod can slide in the first guide hole, the position of the positioning hook can be flexibly adjusted according to ulna anatomical structures of different patients, the positioning accuracy is improved, individual differences are adapted, the bone tunnel positioning accuracy can be improved, and operation errors caused by inaccurate positioning are reduced.
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