Phacoemulsification Handpiece Mode Switching via Vacuum Feedback
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Solution Overview
Problem
Current ocular surgical instrument systems lack automated or semi-automated capabilities to switch between longitudinal and transversal modes during phacoemulsification procedures, requiring surgeons to manually change modes, which can reduce efficiency and increase the risk of complications such as heat introduction and particle repulsion.
Innovation Solution
A method and apparatus for controlling an ultrasonically driven handpiece that dynamically adjusts operational parameters based on sensed ocular surgical parameters, allowing for automatic or semi-automatic switching between tip displacement modes, such as longitudinal and transversal modes, using a sensing device and controller connected to the handpiece, and enabling mode switching based on conditions like vacuum pressure or user input via a foot pedal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual mode switching is used between longitudinal and transversal modes, then the surgeon has control over operation modes, but surgical efficiency is reduced and the risk of complications increases
Solution Approach 1:
The system automatically switches between longitudinal and transversal cutting modes based on real-time vacuum sensor feedback without requiring manual surgeon intervention. The controller monitors vacuum levels and autonomously adjusts handpiece operation mode, allowing the system to serve itself and eliminating the inefficiency of manual mode switching during surgery.
Solution Approach 2:
The system employs a feedback mechanism where vacuum sensors continuously monitor surgical conditions and transmit data to the controller. Based on this real-time feedback, the controller automatically adjusts between cutting modes, creating a closed-loop control system that responds dynamically to surgical conditions without manual input.
2Reliability
If manual mode switching is required during surgery, then the surgeon can adjust operational parameters, but the procedure time increases and complications such as heat introduction and particle repulsion may occur
Solution Approach 1:
The automatic mode switching system ensures continuous optimal cutting action by seamlessly transitioning between longitudinal and transversal modes based on real-time vacuum feedback. This eliminates interruptions and delays associated with manual mode switching, maintaining continuous effective cutting throughout the surgical procedure and reducing overall procedure time.
Solution Approach 2:
The system dynamically adjusts between different cutting modes in real-time based on changing surgical conditions detected by vacuum sensors. This dynamic adaptation allows the system to respond instantly to varying tissue densities and cutting resistance, maintaining optimal performance throughout the procedure without manual intervention.
3Ease of operation
If a single cutting mode is used throughout the procedure, then the system is simpler to operate, but cutting efficiency is reduced under varying surgical conditions
Solution Approach 1:
The cutting procedure is segmented into different operational phases, with the system automatically selecting between longitudinal and transversal cutting modes based on real-time vacuum feedback. This segmentation allows each cutting mode to be optimized for specific surgical conditions, improving overall cutting efficiency while maintaining operational simplicity through automated mode selection.
Solution Approach 2:
The system changes operational parameters, specifically the cutting mode, based on real-time vacuum level detection. By automatically adjusting this critical parameter in response to changing surgical conditions, the system maintains high cutting efficiency throughout the procedure without requiring complex manual parameter adjustments from the surgeon.
4Productivity
If automated mode switching is implemented, then surgical efficiency is improved, but device complexity increases
Solution Approach 1:
The controller is designed to perform multiple functions: it manages both longitudinal and transversal cutting modes, processes vacuum sensor data, and automatically adjusts operational parameters. This multi-functionality consolidates what could be separate complex systems into a single integrated control unit, improving surgical efficiency while managing device complexity through functional integration.
Solution Approach 2:
The system replaces manual mechanical mode switching with an automated electronic control system that uses vacuum sensor feedback. This substitution eliminates the need for physical mode switching mechanisms and manual surgeon actions, achieving higher surgical efficiency through electronic automation while keeping the overall device complexity manageable through sensor-based control.
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 solution enhances surgical efficiency by allowing for real-time adjustments in tip displacement modes, reducing the need for manual mode switching, minimizing heat introduction, and improving followability of the phaco tip, thereby enhancing the safety and effectiveness of the surgical procedure.
Implementation Method 1
measuring an ocular surgical related parameter
Implementation Method 2
ultrasonically driven handpiece
Data Source
AI summary
A method and system for use in an ocular surgical procedure is provided. The design includes a handpiece having an ultrasonically vibrating tip operational within a plurality of operating modes including a first operating mode and a sensing device, such as a vacuum pressure sensor. A controller is connected to the handpiece and sensing device and is configured to receive data from the sensing device and adjust at least one operational parameter (time/duty cycle of operation, power during operation) associated with the first operating mode and adjust at least one parameter associated with another operating mode based on the data received from the sensing device. Operational modes may include multiple longitudinal or non-longitudinal modes (torsional, transversal, etc.) or combinations of longitudinal and/or non-longitudinal modes.