Glaucoma Drainage Implant Shunt for Controlled Fluid Release
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Solution Overview
Problem
Current glaucoma drainage implants face challenges in uniformly and repeatably releasing fluid during the initial post-operative period, leading to variable intraocular pressure due to the formation of a tissue capsule and the need for manual or inconsistent methods to create holes or slits for fluid drainage.
Innovation Solution
A glaucoma drainage assembly that includes a shunt with a small, hollow stainless steel tube and a pointed end for penetration into the implant tube, creating a controlled fluid flow channel from the anterior chamber of the eye to the subconjunctival space, allowing for consistent regulation of intraocular pressure until the tissue capsule forms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual or inconsistent methods are used to create holes or slits for fluid drainage, then fluid release can be achieved, but uniformity and repeatability of fluid release are poor
Solution Approach 1:
The shunt is pre-formed with a specific diameter and geometry before implantation. The pointed end is pre-configured to facilitate penetration into the tube wall, eliminating the need for manual hole creation and ensuring consistent fluid release characteristics from the beginning of the post-operative period.
Solution Approach 2:
The shunt provides a controlled, consistent aperture diameter (e.g., 40-50 microns) that maintains uniform fluid flow characteristics. This standardized parameter replaces variable manual methods, ensuring repeatable fluid release rates throughout the initial post-operative period until capsule formation.
2Reliability
If a closure is placed to preclude fluid flow during capsule formation, then proper capsule development is promoted, but fluid release is blocked during the initial post-operative period
Solution Approach 1:
The fluid release function is segmented into two phases: (1) initial phase with shunt-only flow through the tube wall aperture, and (2) later phase with closure engagement providing controlled flow through the closure mechanism. This segmentation allows each component to serve its specific function at the appropriate time.
Solution Approach 2:
The shunt acts as an intermediary structure that provides initial fluid release through the tube wall, bridging the period before the closure is ready to take over. It mediates between the need for initial drainage and the eventual need for closure-controlled flow, ensuring continuous but regulated fluid release.
3Adaptability or versatility
If the shunt has a small diameter aperture for controlled flow, then fluid release is regulated, but the shunt is difficult to insert through the tube wall
Solution Approach 1:
The shunt exhibits asymmetric geometry with a pointed end and a larger external diameter. The pointed end facilitates easy penetration into the tube wall, while the main body provides the small aperture for controlled fluid flow. This asymmetric design resolves the contradiction between insertion ease and flow control.
Solution Approach 2:
Instead of attempting to insert a small-diameter shunt through a small aperture (which would be difficult), the design inverts the approach: the shunt is inserted through the tube wall with its pointed end leading, and the small aperture is formed as part of the shunt structure itself, not as the insertion path.
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 solution enables consistent and controlled fluid release from the drainage implant tube, reducing variability in intraocular pressure and promoting a healthy pressure range by providing a uniform flow rate until the tissue capsule is fully developed.
Implementation Method 1
the shunt is configured to at least partially define a fluid flow channel from the lumen of the drainage implant to the subconjunctival space, external to the tube
Implementation Method 2
The shunt may include a pointed leading edge, where the shunt may be configured to penetrate the drainage implant tube in response to the pointed leading edge being pressed into the drainage implant tube
Data Source
AI summary
Provided herein is a glaucoma drainage implant assembly. The assembly may include a drainage implant tube defining a lumen there through defining a fluid channel between an anterior chamber of an eye and a region outside of the sclera of the eye; a closure disposed at a position outside the anterior chamber of the eye, the closure configured to preclude fluid flow from the anterior chamber of the eye to the region outside of the sclera of the eye; and a shunt received within the drainage implant tube, between the end of the drainage implant tube in the anterior chamber of the eye and the closure, where the shunt is configured to permit fluid flow from the anterior chamber of the eye, through the drainage implant tube, and out of the drainage implant tube external to the sclera of the eye through the shunt.