Intravitreal Injection for Retinal Detachment Repair
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Solution Overview
Problem
Current methods for treating retinal detachment rely heavily on invasive surgical procedures and tamponade agents like gas or silicone oil, which are not suitable for all types of retinal tears and have limited success rates, especially in non-surgical procedures.
Innovation Solution
A non-invasive approach involving the injection of substances such as hyaluronic acid or hydroxypropyl methylcellulose into the vitreous cavity to slow the diffusion of water and solutes, reducing subretinal fluid accumulation and allowing the retinal pigment epithelium to reattach the retina without the need for tamponade agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If invasive surgical procedures with tamponade agents (gas or silicone oil) are used to seal retinal tears, then the success rate of retinal detachment repair is improved (80-85%), but the invasiveness and complexity of the procedure increases
Solution Approach 1:
The invention extracts and eliminates the need for tamponade agents (gas or silicone oil) from the retinal detachment repair process. Instead of sealing the retinal break with external agents, the method removes the requirement for these complex materials by using intravitreal injections to control fluid dynamics, thereby simplifying the overall treatment approach while maintaining effectiveness.
Solution Approach 2:
The invention introduces intravitreal injections as an intermediary mechanism to control subretinal fluid accumulation. Rather than directly sealing the retinal break with tamponade agents, the method uses intravitreal injections to modulate fluid dynamics as an intermediate step, allowing the retinal pigment epithelium to naturally reabsorb fluid and achieve retinal reattachment.
2Ease of operation
If non-surgical procedures with gas bubble injection are used to seal retinal tears, then the invasiveness is reduced, but the success rate decreases to 50% and strict patient positioning is required
Solution Approach 1:
The invention enables the retinal pigment epithelium to perform its natural function of subretinal fluid reabsorption without requiring external tamponade agents or strict patient positioning. By using intravitreal injections to create favorable fluid dynamics, the method allows the eye's own physiological mechanisms to achieve retinal reattachment, eliminating the need for post-procedure positioning constraints.
Solution Approach 2:
The invention changes the physical parameters of the vitreous cavity through intravitreal injections, modifying fluid dynamics and pressure characteristics to favor subretinal fluid reabsorption. This parameter modification approach replaces the need for gas bubble tamponade and strict positioning, achieving similar or better outcomes through biochemical and physical parameter control rather than mechanical sealing.
3Reliability
If tamponade agents are used to seal retinal breaks, then subretinal fluid accumulation is prevented, but the natural reattachment process by retinal pigment epithelium is bypassed
Solution Approach 1:
The invention converts the harmful effect of subretinal fluid accumulation into a beneficial process by controlling fluid dynamics to enhance the natural reabsorption function of the retinal pigment epithelium. Instead of blocking fluid flow with tamponade agents, the method uses intravitreal injections to create conditions where fluid accumulation actually stimulates and facilitates the physiological reattachment process.
Solution Approach 2:
The invention allows the retinal pigment epithelium to perform its natural function of subretinal fluid reabsorption without external intervention at the retinal break site. By using intravitreal injections to control overall fluid dynamics, the method enables the retina's own cellular mechanisms to achieve reattachment, rather than relying on externally applied sealing agents.
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 method effectively reduces subretinal fluid accumulation, facilitating retinal reattachment by altering the viscosity of the vitreous fluid, thereby outpacing fluid accumulation and enhancing the retina's natural reattachment process, potentially offering a more successful and less invasive treatment option.
Implementation Method 1
slows the diffusion of water and/or solutes through the vitreous cavity
Implementation Method 2
increasing a viscosity of the fluid in the vitreous cavity
Data Source
AI summary
A method of treating a detachment of a retina of an eye, the method including the steps of injecting a substance into a vitreous cavity of the eye, the substance slowing flow of fluid through the vitreous cavity into a subretinal space to reduce a rate of accumulation of a subretinal fluid in the subretinal space to below a rate of removal of the subretinal fluid from the subretinal space by retinal pigment epithelium; and permitting the retinal pigment epithelium to reattach the retina. The invention also includes devices for practicing the method.