Ophthalmic Fluid Pump Partition Sensing for Stable Intraocular Pressure
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Solution Overview
Problem
Existing ophthalmic surgical systems face challenges in accurately detecting the deflection position of partition elements in fluid pumps, leading to inaccuracies in regulating intraocular pressure during procedures like phacoemulsification, due to component fluctuations and tolerances.
Innovation Solution
Incorporating a plate element made of electrically conductive or ferromagnetic material into the partition element, which is detected using a magnetic field by a sensor unit in the panel, allowing for contactless determination of the deflection position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a partition element is used to separate pump chamber and drive chamber in fluid pumps, then the pump structure becomes simpler and more reliable, but the detection of deflection position becomes inaccurate due to component fluctuations and tolerances
Solution Approach 1:
A plate element made of electrically conductive or ferromagnetic material is introduced as an intermediary between the partition element and the detection system. This plate element serves as a mediator that can be detected by magnetic field sensors, allowing accurate position detection without directly measuring the partition element itself. The plate element translates the mechanical deflection of the partition into a detectable magnetic signal.
Solution Approach 2:
The mechanical detection system is replaced with a magnetic field-based detection system. Instead of using mechanical contacts or optical systems that are sensitive to component tolerances, the invention uses magnetic field sensors to detect the position of the plate element, providing more accurate and stable measurements of the partition element's deflection position.
2Reliability
If contactless detection method is used for partition element position, then sterility is maintained and reliability improves, but the complexity of the detection system increases
Solution Approach 1:
The plate element acts as a magnetic intermediary that enables contactless detection. By attaching this ferromagnetic or electrically conductive plate to the partition element, the system can detect position through magnetic field changes without physical contact, maintaining sterility while enabling reliable measurement.
Solution Approach 2:
The detection system exploits changes in magnetic field parameters (field strength, flux density) caused by the movement of the plate element. By monitoring these magnetic parameter changes, the system can determine the deflection position of the partition element contactlessly, improving reliability without requiring complex mechanical or optical systems.
3Measurement precision
If plate element made of electrically conductive or ferromagnetic material is incorporated into partition element, then contactless detection accuracy improves, but manufacturing complexity increases
Solution Approach 1:
The plate element is merged with the partition element by integrating it into the partition structure. This combination ensures that the plate element moves together with the partition element, maintaining accurate position correlation while simplifying the overall manufacturing process through integrated construction.
Solution Approach 2:
The partition element is constructed as a composite structure incorporating the plate element made of electrically conductive or ferromagnetic material. This composite design allows the partition to maintain its primary separation function while the embedded plate provides the necessary magnetic properties for accurate contactless detection.
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
Enables precise control of fluid pumps, maintaining consistent intraocular pressure and ensuring sterility by contactless detection of the partition element position, facilitating reliable and efficient surgical procedures.
Implementation Method 1
the sensor unit is configured to use a magnetic field to detect a deflection position of the plate element
Implementation Method 2
the partition element has at least one plate element made of an at least electrically conductive or at least ferromagnetic material
Data Source
AI summary
A cartridge for a panel of an ophthalmic surgical system for treating an eye is configured for insertion in a cartridge accommodation region of the panel and has at least one fluid pump for conveying a treatment fluid, the fluid pump has a pump chamber and a drive chamber separated from the pump chamber with a partition element that is at least regionally deflectable, wherein a drive fluid is feedable to the drive chamber and the treatment fluid is feedable to the pump chamber. The partition element has at least one plate element made of an at least electrically conductive or at least ferromagnetic material, said plate element also being deflected in the case of a deflection of at least one region of the partition element. Further, a panel and an ophthalmic surgical system are provided.