Thermal-Pneumatic Diaphragm Pump for Intraocular Pressure Regulation
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Solution Overview
Problem
Current glaucoma treatment methods, such as drainage devices, face inefficiencies in regulating intraocular pressure (IOP) due to limitations in fluid drainage mechanisms, leading to potential irreversible damage from elevated IOP.
Innovation Solution
A system utilizing a heating chamber with a flexible diaphragm and resistive heating element to create a pumping action, which regulates fluid drainage through an intraocular implant by adjusting pressure differentials, employing check valves to control fluid flow directionally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional drainage devices are used to treat glaucoma, then fluid drainage is provided, but the response time is slow and IOP regulation is inefficient
Solution Approach 1:
The patent replaces traditional passive mechanical drainage mechanisms with an active thermal-pneumatic pumping system. A heating element heats a gas in a sealed chamber, causing thermal expansion that actuates a diaphragm to pump fluid, providing rapid and controllable IOP regulation response.
Solution Approach 2:
The system changes the physical state of the gas in the sealed chamber by varying temperature through the heating element. This parameter change (temperature) directly controls the pumping action through thermal expansion and contraction, enabling dynamic and responsive IOP management.
2Measurement precision
If passive drainage mechanisms are used, then device complexity is reduced, but fluid flow control precision deteriorates
Solution Approach 1:
The device is segmented into distinct functional chambers: a sealed pneumatic chamber for actuation and a fluid chamber for drainage. This segmentation allows independent optimization of each function while maintaining overall system precision and controllable complexity.
Solution Approach 2:
A diaphragm serves as an intermediary between the pneumatic actuation chamber and the fluid drainage chamber. It translates thermal-pneumatic pressure changes into precise fluid flow control without direct mechanical connection, enhancing control precision while isolating complex mechanisms.
3Productivity
If active pumping mechanisms are implemented, then IOP regulation responsiveness is improved, but device complexity increases
Solution Approach 1:
The heating element serves multiple functions: it acts as the primary actuator for fluid pumping through thermal expansion, and can potentially serve as a sensor or communication interface component. This multi-functionality reduces overall device complexity while maintaining high responsiveness.
Solution Approach 2:
The system exploits the phase behavior of gas (thermal expansion and contraction) in response to heating and cooling cycles. This natural physical phenomenon provides the pumping action without requiring complex mechanical actuators, motors, or valves, thereby improving responsiveness while limiting complexity growth.
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 system effectively adjusts IOP by actively pumping fluid out of the eye, offering quicker response times and improved responsiveness compared to traditional methods, thereby reducing the risk of vision loss from elevated IOP.
Implementation Method 1
A heating element is arranged and disposed to introduce heat in the heating chamber
Implementation Method 2
a heating chamber comprising a material expandable when heated
Implementation Method 3
A flexible diaphragm separates the heating chamber from the flow passage, and is moveable between a first position and a second position to change a volume of one of the pump chamber and flow passages in response to a temperature change in the heating chamber
Data Source
AI summary
Systems and methods for treating an ocular condition includes a heating chamber comprising a material expandable when heated and comprising a flow passage having an inlet and an outlet. A heating element is arranged and disposed to introduce heat in the heating chamber. A flexible diaphragm separates the heating chamber from the flow passage, and is moveable between a first position and a second position to change a volume of one of the pump chamber and flow passages in response to a temperature change in the heating chamber.