Controllable Discharge Device for Intraocular Pressure Management
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Solution Overview
Problem
Current glaucoma treatments primarily focus on lowering intraocular pressure (IOP) without considering the ratio of IOP to intracranial pressure (ICP), which may not effectively address mechanical loads on the optic nerve and deficits in axonal transport, leading to potential nerve damage.
Innovation Solution
An apparatus with controllable discharge devices, sensors for IOP and ICP, and a control system that adjusts the discharge based on the ratio of these pressures to maintain a normalized pressure difference, using sensors with intracranial and extracranial arrangements, and a processor to regulate the flow rate, ensuring safe pressure reduction and potential medicament delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional glaucoma treatments only lower IOP to statistical normal ranges, then the treatment is simple and based on established protocols, but it does not effectively address mechanical loads on the optic nerve and deficits in axonal transport
Solution Approach 1:
The patent implements a feedback control system where sensors continuously monitor IOP and ICP, and the control device adjusts the discharge device based on the measured pressure difference. This closed-loop feedback mechanism ensures that the pressure difference between intraocular and intracranial spaces is maintained within a target range, thereby effectively addressing mechanical loads on the optic nerve while providing reliable protection against glaucoma progression.
Solution Approach 2:
The control device performs multiple functions: it processes signals from both IOP and ICP sensors, calculates the pressure difference, compares it with target values, and controls the discharge device accordingly. This multi-functional approach integrates monitoring, calculation, comparison, and control into a single system, improving reliability without proportionally increasing complexity.
2Stability of the object's composition
If unregulated shunts with constant flow resistance are used, then the device structure is simple, but the pressure drop fluctuates over the course of the day depending on aqueous humor flow
Solution Approach 1:
The patent employs a dynamic regulation mechanism where the discharge device's flow resistance is continuously adjusted based on real-time pressure measurements. Unlike static shunts with fixed resistance, this dynamic system adapts the discharge rate to maintain a stable pressure difference between IOP and ICP, compensating for fluctuations in aqueous humor production throughout the day.
Solution Approach 2:
The control device changes the operational parameters of the discharge device (specifically flow resistance) based on measured pressure values. By dynamically adjusting the resistance parameter in response to varying aqueous humor flow conditions, the system maintains stable pressure difference despite changes in physiological conditions throughout the day.
3Reliability
If pressure is reduced further to 8-10 mmHg in normal pressure glaucoma, then the IOP is lowered to compensate for progression, but the ratio of IOP to ICP and mechanical loads on the optic nerve are not addressed
Solution Approach 1:
The feedback control system continuously monitors both IOP and ICP and adjusts the discharge device to maintain an optimal pressure difference. This ensures reliable protection against glaucoma progression by addressing the root cause (pressure difference affecting optic nerve) rather than simply lowering IOP to arbitrary target values, while keeping the treatment approach automated and manageable.
Solution Approach 2:
The system performs self-regulation by automatically adjusting the discharge rate based on real-time pressure measurements without requiring manual intervention. The control device independently processes sensor data, determines appropriate discharge rates, and controls the discharge device, making the complex treatment approach operationally simple for the patient.
Data Source
AI summary
An apparatus for influencing an intraocular pressure (IOP) of an eye with a controllable discharge device which is configured to discharge a liquid from at least one area of the eye. The apparatus includes a first sensor device which captures at least one first value that is characteristic for the IOP of the eye, and a second sensor device, which captures at least one second value that is characteristic for a pressure acting on the eye, and a control device which controls the discharge device at least at times taking account of the first characteristic value and the second characteristic value, wherein the second characteristic value is characteristic for an intracranial pressure and/or cerebrospinal pressure.