Electromechanical Phaco Valve Design for Faster Response
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Solution Overview
Problem
Phacoemulsification valves in cataract surgery are slow-acting, leading to potential hazards due to unstable intraocular pressure and vacuum surges during the procedure.
Innovation Solution
Design of fast-acting electromechanical valves with fluid communication links, such as slots or bores, to facilitate piston movement within a cylinder, reducing valve response time and preventing vacuum formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional valves are used in phacoemulsification systems, then the structure is simple and reliable, but the valve response time is slow leading to unstable intraocular pressure and vacuum surges
Solution Approach 1:
The valve is segmented into distinct functional components: a piston dividing the cylinder into first and second cavities, fluid communication links (slots/bores) for pressure equalization, and an electromechanical actuation mechanism. This segmentation allows each component to perform its specific function efficiently, enabling fast response while maintaining manufacturing feasibility.
Solution Approach 2:
The invention uses hydraulic principles by introducing fluid communication links (slots or bores) between the first and second cavities. These links allow fluid to flow and equalize pressure during piston movement, preventing vacuum formation and enabling faster, more controlled valve operation without increasing overall structural complexity.
2Reliability
If fast-acting electromechanical valves are designed with fluid communication links, then valve response time is reduced and vacuum formation is prevented, but the device complexity increases
Solution Approach 1:
Fluid communication links (slots or bores) act as intermediaries between the first and second cavities. These links mediate pressure equalization during piston movement, preventing vacuum formation and ensuring stable intraocular pressure. The intermediary structure adds minimal complexity while significantly improving reliability.
Solution Approach 2:
The fluid communication links provide automatic feedback pressure equalization. As the piston moves and creates pressure differential, fluid automatically flows through the slots/bores to equalize pressure, preventing vacuum formation without requiring external control systems. This passive feedback mechanism enhances reliability without proportionally increasing complexity.
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 enhances safety and efficacy of phacoemulsification procedures by minimizing risks from vacuum surges and maintaining stable intraocular pressure.
Implementation Method 1
a piston inside the cylinder, wherein the piston divides the cylinder volume into a first cavity that is in fluid communication with the fluid channel, and a second, closed, cavity, and wherein the piston is configured to move inside the cylinder so as to regulate the flow of the fluid
Implementation Method 2
one or more fluid communication links, which are formed between the first and second cavities, and configured to allow the fluid to flow between the first and second cavities during motion of the piston
Implementation Method 3
The electromechanical mechanism is configured to move the piston. In an embodiment, the electromechanical mechanism includes an electromagnet, and wherein the piston is magnetically-actuated
Data Source
Figure 1
Figure 2A~2D
Figure 3A~3D
AI summary
A phacoemulsification apparatus includes a phacoemulsification probe, an electromechanical valve, and an electromechanical mechanism. The probe having a fluid channel for exchanging fluid with a patient's eye. The electromechanical valve is coupled with the fluid channel and is configured to regulate a fluid flow through the fluid channel. The valve including a cylinder, a piston inside the cylinder, wherein the piston divides the cylinder into a first cavity that is in fluid communication with the fluid channel, and a second cavity, and one or more fluid communication links, which are formed between the first and second cavities. The piston is configured to move inside the cylinder to regulate the flow of the fluid, and the one or more fluid communication links are configured to allow the fluid to flow between the first and second cavities during motion of the piston. The electromechanical mechanism is configured to move the piston.