insertion device

CN114945336BActive Publication Date: 2026-07-03SMITH & NEPHEW INC +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SMITH & NEPHEW INC
Filing Date
2021-02-16
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In current arthroscopic and endoscopic surgeries, cannulas are difficult to use while maintaining a fluid seal and allowing instruments to move freely in and out. Rigid cannulas may also restrict instrument mobility and increase the risk of injury to patients.

Method used

A sleeve is designed, comprising an elongated body, a radially movable flange, and an actuator. The flange is moved by the longitudinal force of the actuator to adjust the configuration of the sleeve, ensuring smooth passage of the instrument and maintaining a fluid seal within the joint space.

Benefits of technology

It enables free movement of instruments and fluid sealing, improves surgical visualization, reduces fluid expansion loss, and lowers the risk of patient complications.

✦ Generated by Eureka AI based on patent content.

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    Figure CN114945336B_ABST
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Abstract

A cannula for passing a surgical instrument through tissue. In some cases, the cannula may include a flexible distal flange between a radial configuration and a longitudinal configuration. In some cases, the cannula may also include an actuator configured to move the distal flange between the radial and longitudinal configurations. In some cases, the cannula may include a valve disposed within the lumen of the cannula and a cap configured to secure the valve to the cannula. The valve may include a body member having a base and first and second opposing walls extending from the base. In some cases, the valve has an arcuate notch in its lower surface configured to engage around an instrument shaft inserted therethrough. In some cases, the cannula includes a slit extending along its entire length to allow lateral insertion and / or removal of the instrument shaft.
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