Non-linear Aspiration Control in Phacoemulsification Systems
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Solution Overview
Problem
Current surgical systems for phacoemulsification lack a precise and customizable mode for vacuum and aspiration, leading to imprecise control and safety concerns during eye surgery.
Innovation Solution
A phacoemulsification surgical console with a customizable non-linear custom aspiration mode, allowing for precise control of vacuum and aspiration levels through a computer program that calculates delivery based on user-defined parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of vacuum level is used in vacuum-based pumps, then the system is simpler to operate, but the control precision and safety are insufficient
Solution Approach 1:
The system transitions from static manual vacuum adjustment to dynamic computer-controlled adjustment. The computer program continuously monitors surgical parameters and automatically adjusts vacuum levels in real-time, enabling precise control without requiring complex manual intervention. This dynamic control system resolves the contradiction by automating the adjustment process while maintaining system simplicity through software-based control.
Solution Approach 2:
The system implements feedback control where the computer program receives real-time data about surgical conditions and adjusts vacuum levels accordingly. This closed-loop control mechanism ensures precise vacuum control by continuously monitoring and responding to changes in the surgical field, eliminating the imprecision of manual adjustment while maintaining operational simplicity through automated feedback processing.
2Adaptability or versatility
If fixed panel modes are used for aspiration control, then safety is improved through standardized settings, but the adaptability to specific surgical needs is reduced
Solution Approach 1:
The computer program serves multiple functions: it can operate in standardized panel modes for routine procedures and switch to custom aspiration modes for specialized surgical needs. This multi-functionality allows the system to adapt to various surgical scenarios without requiring separate dedicated systems, resolving the contradiction between adaptability and complexity by consolidating multiple control strategies into a single intelligent platform.
Solution Approach 2:
The system enables dynamic parameter changes within the custom aspiration mode, allowing surgeons to adjust vacuum levels, flow rates, and other parameters based on specific surgical requirements. The computer program processes these parameter changes in real-time and adjusts the aspiration pump accordingly, providing high adaptability while maintaining simple operation through a unified control interface.
3Measurement precision
If linear adjustment mode (0% to 100%) is used, then the control range is sufficient, but the precision for intermediate adjustments is inadequate
Solution Approach 1:
The system transitions from static linear adjustment to dynamic non-linear adjustment controlled by computer algorithms. The program can apply different adjustment curves and scaling factors to achieve precise intermediate values without requiring complex manual calculations. This dynamic approach maintains operational simplicity by automatically handling the complexity of precise adjustment through software-based non-linear transformation.
Solution Approach 2:
The system replaces manual mechanical adjustment with computer-based digital control. The computer program calculates and applies precise intermediate adjustment values through digital signal processing, eliminating the need for complex mechanical adjustment mechanisms. This substitution maintains ease of operation through simple digital input while achieving high precision through algorithmic control.
4Speed
If rapid adjustment is implemented for urgent surgical situations, then the response time is improved, but the risk of overshooting or instability increases
Solution Approach 1:
The system implements real-time feedback control where the computer program continuously monitors the effects of vacuum adjustments and makes corrective modifications. This closed-loop control allows rapid response to urgent surgical situations while maintaining stability through continuous monitoring and adjustment. The feedback mechanism detects overshooting conditions and automatically corrects them, resolving the contradiction between speed and reliability.
Solution Approach 2:
The system uses periodic monitoring and adjustment cycles to maintain control stability during rapid changes. The computer program checks surgical parameters at regular intervals and adjusts vacuum levels in controlled increments, preventing instability while maintaining fast response capability. This periodic action ensures that rapid adjustments are made in a controlled manner, balancing speed with reliability.
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 provides a more precise and responsive control over vacuum and aspiration, enhancing safety and efficacy during phacoemulsification procedures by allowing for tailored adjustments based on specific surgical needs.
Implementation Method 1
a venturi pump creates a lower pressure in a drainage cassette reservoir, which causes the fluid to flow from the eye into the aspiration line
Implementation Method 2
a phacoemulsification handpiece, which is typically comprised of a needle that is ultrasonically driven in order to emulsify, i.e., to liquefy, the natural crystalline lens
Data Source
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AI summary
An apparatus, system and method for providing a may include at least a phacoemulsification surgical console having a customizable non-linear custom aspiration mode. The console may include at least an aspirator; a foot pedal; and a non- transitory computing code resident on a computing memory associated with a computing processor which, when executed by the processor, causes to be executed the steps of: receiving a percentage actuation of the foot pedal; calculating, including from a non-linear algorithm, a percentage actuation for the aspirator corresponded to the received percentage foot pedal actuation; and dictating the calculated percentage aspirator actuation to the aspirator.