Dual-Incision Intraocular Device for Complete Trabecular Meshwork Removal
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Solution Overview
Problem
Existing surgical procedures for treating glaucoma, such as goniotomy, often fail to completely remove the trabecular meshwork (TM) without leaving behind leaflets that can scar and raise intraocular pressure, and require expensive equipment and a steep learning curve.
Innovation Solution
A dual-blade device designed to conform to the Schlemm's canal anatomy, using a ramp to elevate and precisely cut the TM with two lateral blades, minimizing tissue damage and allowing for complete removal without ablation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional goniotomy procedures are used, then the procedure can be performed with existing equipment, but the trabecular meshwork is not completely removed and leaflets remain that can scar and raise intraocular pressure
Solution Approach 1:
The device divides the cutting function into two separate lateral blades (first lateral blade and second lateral blade) that work together to make precise incisions on opposite sides of the trabecular meshwork. This segmentation allows for complete removal of the meshwork by cutting it into manageable sections that can be fully extracted, rather than leaving residual leaflets behind.
Solution Approach 2:
The ramp structure serves as an intermediary element that elevates the trabecular meshwork between the first and second lateral blades. This intermediary mechanism positions the tissue optimally for cutting, enabling complete removal while simplifying the surgical procedure by providing a built-in tissue manipulation feature.
2Reliability
If ablation techniques are used to remove trabecular meshwork, then complete removal can be achieved, but significant trauma is caused to adjacent tissues
Solution Approach 1:
The device replaces thermal or chemical ablation mechanisms with a purely mechanical cutting system. The two lateral blades make precise mechanical incisions through the trabecular meshwork, allowing complete removal via cutting rather than ablation. This mechanical approach minimizes collateral thermal damage to adjacent tissues while achieving complete meshwork removal.
3Manufacturing precision
If expensive specialized equipment is used for glaucoma surgery, then precise tissue removal can be achieved, but the equipment cost is high and learning curve is steep
Solution Approach 1:
The device integrates multiple functions into a single instrument: the shaft provides structural support and access, the ramp elevates and positions the trabecular meshwork, and the two lateral blades perform precise cutting. This multi-functionality achieves precision tissue removal with a single device rather than requiring multiple specialized instruments, reducing overall equipment complexity and cost.
Solution Approach 2:
The device design allows for cost-effective manufacturing using simple materials such as stainless steel or titanium for the shaft and blades. The straightforward construction with basic geometric features (cylindrical shaft, inclined ramp, sharp blades) enables production of affordable surgical instruments that can be disposed of after single use, eliminating the need for expensive reusable equipment with complex maintenance requirements.
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 achieves precise and complete removal of TM, reducing intraocular pressure effectively and minimizing trauma to adjacent tissues, suitable for use in underserved areas with lower equipment costs and easier adoption.
Implementation Method 1
a ramp from said insertion blade tip back towards the posterior end the beveled platform
Data Source
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AI summary
An ophthalmic device and methods of its use can be applied for treatment of various conditions including eye diseases, such as glaucoma, using minimally invasive surgical techniques. The ophthalmic device can be used to cut the trabecular meshwork (TM) in the eye. The device tip provides entry into the Schlemm's canal and ramped portions elevate the TM under tension and guide it to lateral blades. An entire strip of TM can be removed without leaving TM leaflets behind and without causing collateral damage to adjacent tissues.