Corrugated Membrane Actuator for Intraocular Pressure Control
Solution Overview
Problem
Conventional drainage devices for glaucoma treatment lack smart, interactive control over fluid flow, leading to increased flow resistance due to fibrosis and reduced effectiveness over time, as they rely on passive check valves with no mechanism to manage bleb over-pressurization.
Innovation Solution
The use of corrugated membrane actuators in IOP control systems that deflect in response to pressure differentials, allowing for fine-tuned control of fluid flow through a drainage device, thereby regulating intraocular pressure by modifying the size of the fluid flow channel in response to pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If flat membrane actuators are used, then the device structure is simple, but the controllability and sensitivity to pressure changes are limited
Solution Approach 1:
The patent applies corrugations (curved structures) to the membrane surface, transforming it from a flat plane to a three-dimensional corrugated structure. This curvature increases the membrane's sensitivity to pressure changes while maintaining structural simplicity, directly resolving the contradiction between device complexity and measurement precision.
Solution Approach 2:
The patent modifies the membrane's physical parameters by introducing corrugations with specific geometries (amplitude, wavelength, depth). These parameter changes enhance the membrane's mechanical sensitivity to pressure differentials, allowing for finer control and detection of pressure changes without significantly increasing overall device complexity.
2Device complexity
If passive check valves are used, then the device is simple, but the ability to control flow and manage bleb over-pressurization is lacking
Solution Approach 1:
The patent transitions from a static passive check valve to a dynamic membrane actuator that responds to pressure differentials. The corrugated membrane dynamically adjusts the flow channel size based on real-time pressure conditions, enabling active flow control and bleb pressure management while maintaining relative device simplicity.
Solution Approach 2:
The membrane actuator functions as a feedback mechanism by sensing pressure differentials across the drainage device and automatically adjusting flow resistance accordingly. This closed-loop control improves reliability by preventing bleb over-pressurization without requiring complex external control systems.
3Stability of the object's composition
If very thin or very large flat membranes are used to achieve predictable deflection, then the membrane is more compliant, but the device size increases or manufacturing becomes difficult
Solution Approach 1:
By introducing corrugations, the patent achieves predictable deflection behavior without requiring extremely thin or large membranes. The corrugated geometry provides structural stability while maintaining compliance, making the membrane easier to manufacture with standard materials and processes.
Solution Approach 2:
The patent optimizes the corrugation parameters (amplitude, wavelength, depth) to achieve the desired deflection characteristics with membranes of practical thickness and size. This parameter optimization enables predictable deflection while maintaining ease of manufacture with conventional materials and fabrication methods.
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
This approach provides greater controllability and sensitivity to pressure changes, reducing the influence of material stress and enhancing mechanical sensitivity, allowing for more precise management of intraocular pressure and minimizing the risk of bleb-related complications.
Implementation Method 1
the corrugated membrane may be configured to affect flow through the fluid flow channel from the fluid inlet to the fluid outlet by deflecting in response to pressure differentials of the reference chamber pressure and the fluid flow channel pressure acting on the opposing sides of the corrugated membrane
Implementation Method 2
The membrane actuators disclosed herein include corrugations designed to extend the linear range of the membrane in response to pressure differentials across the membrane
Data Source
AI summary
An IOP control valve is disclosed. The IOP control valve comprises a corrugated membrane and a housing including a fluid inlet and a fluid outlet. The corrugated membrane is anchored within the housing to form a reference chamber on a first side of the corrugated membrane and a fluid flow channel on a second opposing side of the membrane. The reference chamber has a reference chamber pressure representative of atmospheric pressure. The fluid flow channel can selectively increase and decrease in size to permit fluid to flow from the fluid inlet to the fluid outlet. The corrugated membrane is configured to affect flow through the fluid flow channel from the fluid inlet to the fluid outlet by deflecting in response to pressure differentials of the reference chamber pressure and the fluid flow channel pressure acting on the opposing sides of the corrugated membrane.