Cannula Holder With Segmented Claw Portions For Secure Ophthalmic Attachment
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Solution Overview
Problem
The existing cannula holders face challenges in securely attaching and easily removing the cannula from the holder during ophthalmic operations without detaching it from the eyeball.
Innovation Solution
A cannula holder with claw portions on its front end that press the cannula from multiple directions, combined with a depression for easy removal and a resin cap with a slit for the piercing needle, allowing secure attachment and easy detachment using tweezers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cannula is secured firmly to the holder, then stable attachment during piercing is achieved, but the cannula may detach from the eyeball when removing the holder
Solution Approach 1:
The holder is divided into multiple claw portions (first claw portion and second claw portion) that independently engage with different parts of the cannula. This segmentation allows distributed securing force during piercing while enabling selective release during removal, resolving the contradiction between stable attachment and easy removal.
Solution Approach 2:
The claw portions are designed to be movable relative to the holder body, allowing them to dynamically adjust their gripping force. During piercing, the claws maintain firm engagement for stability; during removal, the claws can be actuated to release the cannula, preventing detachment from the eyeball while enabling holder removal.
2Measurement precision
If the cannula is attached to the holder for piercing, then secure positioning is achieved, but the cannula needs to be removed after piercing
Solution Approach 1:
The claw portions act as intermediary elements between the holder and the cannula. They provide secure positioning during piercing through precise engagement, while also serving as the interface for easy removal by actuating the claws to release the cannula, thus mediating between positioning accuracy and removal ease.
3Reliability
If the cannula is held securely during piercing, then stable operation is achieved, but the cannula must be easily removable after use
Solution Approach 1:
The holder employs multiple segmented claw portions that can independently engage and release the cannula. This segmentation enables reliable secureholding during piercing operations while allowing convenient removal by actuating the release mechanism, resolving the contradiction between piercing stability and removal convenience.
Data Source
AI summary
A cannula holder capable of securing a cannula to the holder at the time of piercing work, and easily removing the cannula from the holder using tweezers or the like. The cannula holder, to which a piercing needle for piercing an eyeball and a cannula are attached when attaching the cannula used in ophthalmic operations to the eyeball, includes claw portions that are formed on a front end of the cannula holder and which press sides of the cannula either at positions where said claw portions face each other or from multiple directions. A depression may be provided in a side of the front end of the cannula holder, allowing visibility of a part of a back end of the cannula from the depression.