Phacoemulsification Needle Vibration Control via Segmented Actuators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing phacoemulsification systems face challenges in effectively controlling the vibration patterns of the phacoemulsification needle, which is crucial for efficient emulsification of the lens during cataract surgery.
Innovation Solution
A system comprising a needle, an actuator assembly with multiple actuators distributed around the needle's longitudinal axis, and a generator that produces specific driving signals to create predefined vibration patterns, allowing for precise control of the needle's vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple actuators are distributed around the needle's longitudinal axis to create predefined vibration patterns, then the precision and effectiveness of lens emulsification is improved, but the device complexity increases
Solution Approach 1:
The actuator assembly is segmented into multiple independent actuators distributed around the longitudinal axis of the needle. Each actuator can be independently controlled to produce specific vibration patterns, allowing precise control over the needle's vibration characteristics while maintaining modular simplicity in the overall design.
Solution Approach 2:
The system employs dynamic control of vibration patterns through the generator, which produces specific driving signals that vary in amplitude, frequency, and phase. This allows the vibration pattern to be dynamically adjusted during operation to optimize emulsification effectiveness for different surgical conditions without requiring multiple fixed-pattern actuators.
2Productivity
If multiple actuators with specific driving signals are used to create predefined vibration patterns, then the effectiveness of phacoemulsification is improved, but the energy consumption increases
Solution Approach 1:
The generator produces periodic driving signals with specific frequencies and amplitudes that match the resonant characteristics of the needle and lens material. This periodic action maximizes emulsification effectiveness at optimized energy levels, avoiding continuous high-energy input and reducing overall energy consumption while maintaining high productivity.
Solution Approach 2:
The system dynamically adjusts vibration parameters including frequency, amplitude, and phase relationships between actuators based on real-time surgical conditions. This allows the system to operate at optimal energy efficiency points for different stages of emulsification, reducing unnecessary energy consumption while maintaining effective lens breakdown.
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 enables improved precision and effectiveness in emulsifying the lens by allowing surgeons to apply specific vibration patterns, enhancing the quality of phacoemulsification procedures.
Implementation Method 1
at least one piezoelectric motor having a coupling surface for coupling the motor to a moveable body
Implementation Method 2
The needle is configured to be vibrated so as to emulsify a lens of an eye
Data Source
AI summary
A system includes a needle, an actuator assembly and a generator. The needle is configured to be vibrated so as to emulsify a lens of an eye. The actuator assembly, includes a first actuator, a second actuator and a third actuator, which are distributed around a longitudinal axis of the needle and are configured to vibrate along the longitudinal axis in response to a first driving signal, a second driving signal and a third driving signal, respectively. The generator is configured to generate the first driving signal, the second driving signal and the third driving signal, so as to vibrate the needle in accordance with a predefined pattern.