Glaucoma Implant With Capacitive Sensor And Microvalve
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Solution Overview
Problem
Current glaucoma drainage implants face challenges with size, biocompatibility, and the lack of integrated valves that effectively monitor and respond to intraocular pressure changes, particularly in addressing fibrosis progression and other complications that affect sensor accuracy.
Innovation Solution
A glaucoma drainage implant system with a pressure sensor and microvalve, featuring a battery-free capacitive sensor and external reading unit that provides on-demand IOP measurement and alerts for medical intervention, utilizing a quasi-bistable microvalve and conductive polymeric materials for biocompatibility, and RF energy transmission for data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensor is integrated into the glaucoma drainage implant, then intraocular pressure monitoring capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the pressure sensor, microvalve, and drainage functions into a single integrated implantable device. The sensor and valve are merged into one unit that can be implanted together, reducing the number of separate components and simplifying the overall system architecture while maintaining advanced monitoring capabilities.
Solution Approach 2:
The implantable device performs multiple functions simultaneously: it monitors intraocular pressure via the sensor, regulates fluid flow through the microvalve, and drains aqueous humor. This multi-functionality reduces the need for separate devices and reduces overall system complexity despite the advanced capabilities.
2Adaptability or versatility
If a microvalve is integrated into the implant, then response to pressure changes is improved, but device complexity increases
Solution Approach 1:
The microvalve is integrated with the pressure sensor within the same implantable housing, creating a unified system where the valve responds directly to sensor readings. This integration reduces the need for external control mechanisms and simplifies the system architecture.
Solution Approach 2:
The microvalve is designed to respond automatically to pressure changes detected by the integrated sensor, creating a self-regulating system. The device monitors and adjusts fluid flow without requiring external intervention or complex control systems, reducing overall device complexity while maintaining adaptability.
3Ease of operation
If wireless monitoring capability is added, then patient monitoring convenience is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical or wired monitoring systems with wireless communication technology. The implantable sensor transmits pressure data wirelessly to external receivers, eliminating the need for physical connections or mechanical interfaces and reducing device complexity while improving patient convenience.
Solution Approach 2:
The system uses wireless signals as an intermediary to transfer data between the implantable sensor and external monitoring devices. This intermediary communication method simplifies the connection between components while maintaining monitoring convenience for patients.
4Object-affected harmful factors
If the implant size is reduced for better biocompatibility, then biocompatibility is improved, but sensor accuracy may deteriorate
Solution Approach 1:
The patent employs thin-film technologies for the sensor membranes and implantable components. These thin films maintain sensor functionality and measurement accuracy while reducing overall device size and improving biocompatibility by minimizing the foreign body response.
Solution Approach 2:
The sensor design utilizes changes in physical parameters such as capacitance or resistance in response to pressure changes, allowing for accurate measurements in a compact form factor. By optimizing the electrical parameters of the sensor, accuracy is maintained despite reduced physical dimensions.
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 system effectively reduces intraocular pressure by draining aqueous humor and provides accurate, real-time monitoring and alerts, enhancing treatment guidance for glaucoma patients while ensuring biocompatibility and flexibility.
Implementation Method 1
The working principle of these passive LC sensors is typically based on detecting variations of concomitant resonance frequencies, where the quantity to be measured waves out the capacitive or inductive elements of the sensor. This could occur, for example, through mechanical deflection of electrodes.
Implementation Method 2
This could occur, for example, through mechanical deflection of electrodes.
Implementation Method 3
The implant includes a flat coil to energize the sensor and the microvalve
Data Source
AI summary
Glaucoma drainage implant system with intracular pressure sensor and microvalve, and external reading unit, including: (1) an ocular implant device including a main body attached to a cannula communicating through a microchannel passing therethrough with a sensor microchamber; the microchamber is in fluid communication with a microvalve regulating outlet passage of ocular liquid, the microvalve being covered by a plate in the main body, the implant device has also a flat coil energizing the sensor, microvalve and regulation microchip; and (2) an external reading unit receiving signals from the PIO sensor and displaying IOP pressure; the UEL includes an antenna and a main unit; where the antenna feeds by bursts of RF radio frequency energy to the implant sensor and when the sensor is energized, it returns a signal with information from the IOP, this signal being received by the antenna and sent to the main unit for processing.