Curved Eye Needle Insertion With Spherical Stabilizing Contact
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Solution Overview
Problem
Existing needle insertion devices for electroporation in the eye cause eye rotation due to the impact of the needle hitting the surface, requiring bulky clamps and additional operators for stabilization.
Innovation Solution
A device with a support base and curved needles that compress the eye during insertion, using a spherical contact surface and a rim to stabilize the eye, allowing single-operator insertion without rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If needles are inserted tangentially to the eye surface, then insertion precision is improved, but eye rotation occurs due to impact force
Solution Approach 1:
The device applies preliminary compression force to the eye surface before needle insertion to counteract the harmful impact force. The compression element presses against the eye surface in advance, creating a stabilizing force that prevents rotation when the needle tip impacts the surface during tangential insertion.
Solution Approach 2:
The compression element is positioned and activated before the needle insertion process begins. By pre-compressing the eye surface, the device prepares the tissue to receive the needle impact without rotating, thereby enabling precise tangential insertion without the harmful side effect of eye rotation.
2Stability of the object's composition
If clamps are used to maintain the eye, then eye stability is improved, but device complexity and operator requirements increase
Solution Approach 1:
The device merges the stabilization function with the needle insertion mechanism by integrating a compression element directly into the insertion device. This eliminates the need for separate clamps and reduces the number of components required, while still achieving effective eye stabilization during the procedure.
Solution Approach 2:
The compression element serves multiple functions: it stabilizes the eye during insertion, applies controlled compression force to prevent rotation, and works in conjunction with the needle guidance mechanism. This multi-functionality replaces the need for separate stabilization devices like clamps.
3Stability of the object's composition
If clamps are used to maintain the eye, then eye stability is improved, but ease of operation deteriorates due to requiring extra operators
Solution Approach 1:
The device combines stabilization and insertion operations into a single integrated system that can be operated by one person. The compression element and needle insertion mechanism work together as a unified device, eliminating the need for multiple operators to manage separate stabilization and insertion tasks.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device stabilizes the eye during needle insertion, enabling precise and stable positioning with a single operator, reducing the risk of eye rotation and facilitating efficient electroporation.
Implementation Method 1
the first and second needles compress the virtual sphere toward the median radial plane of the rim when they reach the first and second intermediate piercing positions
Data Source
Figure 1
Figure 2~3
Figure 4~5b
AI summary
The present invention relates to a device comprising: - a support (4) comprising a support base (10) defining - a spherical base contact surface (18), extending along a virtual sphere (S) and - a circular rim (20) extending in a rim plane (P20); - a first and a second needle (8a;8b) mobile on the support between extracted and inserted positions in which the first and second needles are outside and maximally inserted in said virtual sphere, respectively, via first and second intermediate piercing positions in which, respectively, the first and second needles extend along first and second insertion axis (Δ8a;Δ8b) and their tips are located on first and second insertion points (M8a;M8b) belonging respectively to first and second hemispheres of the virtual sphere separated by a "median radial plane of the rim", an angle (θ) between the median radial plane and any insertion axis being between 70° and 110°.