Adjustable Glaucoma Drainage Valve for Precise IOP Control
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Solution Overview
Problem
Existing glaucoma treatments struggle to effectively manage intraocular pressure (IOP) by adjusting the drainage flow rate of aqueous humor, and there is a need for a device that allows patients to self-monitor IOP and prevent unwanted fluctuations.
Innovation Solution
A drainage device with adjustable valves and shunts that control aqueous humor outflow, featuring a mechanism to self-adjust drainage based on IOP and include a valve to prevent backflow, allowing patients to check IOP directly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fixed drainage devices are used for glaucoma management, then the device structure is simple, but the drainage flow rate cannot be adjusted and IOP control precision is poor
Solution Approach 1:
The patent implements adjustable drainage flow rate through a mechanism that allows the valve opening area to be dynamically changed. The valve assembly can be adjusted to different positions, changing the effective opening area and thus the drainage flow rate, enabling precise IOP control while maintaining reasonable device structure.
Solution Approach 2:
The patent changes the parameter of valve opening area to control drainage flow rate. By adjusting the valve position and opening area, the system achieves different drainage rates to match varying IOP requirements, improving IOP control precision without excessive complexity.
2Reliability
If drainage flow rate is increased to manage glaucoma, then IOP reduction is achieved, but backflow of aqueous humor occurs and hypotony develops
Solution Approach 1:
The patent incorporates a feedback mechanism where the valve responds to pressure differences between intraocular and extraocular spaces. The valve opening area is adjusted based on IOP conditions, automatically reducing drainage when IOP is low to prevent hypotony and backflow, while maintaining adequate drainage when IOP is high.
Solution Approach 2:
The system dynamically changes the valve opening area parameter in response to pressure conditions. When IOP decreases, the valve automatically reduces opening area or closes to prevent backflow and hypotony. When IOP is elevated, the valve increases opening area to enhance drainage, thus maintaining IOP stability.
3Measurement precision
If adjustable valves are added to control drainage, then IOP control precision improves, but device complexity increases
Solution Approach 1:
The patent divides the valve mechanism into separable components including the valve body, adjustable elements, and sealing structures. This segmentation allows for precise control of drainage flow rate through independent adjustment of valve opening area while keeping the overall device structure manageable and not excessively complex.
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 precisely regulates IOP by adjusting drainage flow rates and enables patient self-monitoring, preventing hypotony by ensuring controlled fluid outflow.
Implementation Method 1
The valve-cover piece is connected to a spring that applies force on one side of the valve-cover piece and pushes it against the tube-surface-valve opening in order to seal it
Implementation Method 2
The sliding-seal piece is used with both second and third part of Rakan glaucoma device, However the second part could be in a different design without using sliding-seal piece and without being connected to third part of Rakan glaucoma device
Implementation Method 3
The difference between the two pressures/forces—on the opposing sides determines the direction and the amount of movement of the indicator-valve-seal piece
Data Source
AI summary
The present invention is a device that is used for glaucoma management by using an adjustable drainage device. And this device has an indicator to help patient checking the intraocular pressure hence seeking medical advice immediately as needed.