Cannula with instrument locking mechanism

WO2025255408A1PCT designated stage Publication Date: 2025-12-11ARTHREX INC
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Patent Information

Application Number
PCT/US2025/032550
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-06
Filing Date
2025-06-05
Publication Date
2025-12-11

AI Technical Summary

Technical Problem

Existing arthroscopic and endoscopic surgical procedures face ergonomic challenges due to the reliance on the 'five finger technique' to maintain the relative depth and orientation of surgical instruments within cannulas, leading to hand and wrist fatigue and potential slippage.

Method used

A cannula with a locking mechanism that selectively secures the relative depth and orientation of surgical instruments, featuring a retainer that transitions between locked and unlocked orientations, utilizing biasing members to maintain or release the position and orientation, allowing for ergonomic relief and secure fixation.

Benefits of technology

The cannula improves ergonomics by allowing surgeons to operate instruments without manual hand support, maintaining instrument position and orientation, reducing fatigue, and preventing unintentional slippage during procedures.

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Abstract

Disclosed herein are components, systems, and methods to secure and maintain the relative position and orientation of surgical instruments, such as an endoscope and a cannula. A retainer of the cannula includes a locked orientation in which the cannula is secured to the endoscope and prevents translational and rotational movement of the endoscope relative to the cannula. The retainer transitions from a locked orientation to an unlocked orientation in which the endoscope is freely movable relative to the cannula.
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Citation Information

Patent Citations

  • Tilting tang cannula depth limiter

    US20210338283A1

  • Locking cannula for endoscopic surgery

    US5456673A