Nonlinear Phaco Ultrasonic Power Control for Overheating Reduction
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Solution Overview
Problem
Current ultrasonic power delivery methods in phacoemulsification surgery are simplistic and limited, leading to inefficiencies such as overheating, time lag, turbulence, and inadequate control over power levels, which can result in suboptimal emulsification and aspiration processes.
Innovation Solution
A customizable non-linear power delivery mode is introduced, utilizing a computing system and footpedal actuation to calculate and adjust ultrasonic power levels through a non-linear algorithm, allowing for varying rates of increase and decrease in power delivery, and defining optimal power control zones for enhanced surgical precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional linear or panel power delivery modes are used, then the system is simple to operate, but the control precision over ultrasonic power levels is insufficient leading to overheating and inefficiencies
Solution Approach 1:
The patent implements dynamic power delivery by transitioning from static linear or panel modes to a non-linear custom mode where power levels continuously adapt based on real-time feedback from multiple sensors (acoustic, temperature, pressure). The system dynamically adjusts power delivery rates, increases, and decreases based on surgical conditions, resolving the contradiction between control precision and system complexity.
Solution Approach 2:
The system incorporates multiple feedback mechanisms including acoustic feedback from the surgical site, temperature feedback to prevent overheating, and pressure feedback from the footpedal. This multi-layered feedback system enables precise power control by continuously monitoring conditions and adjusting power delivery accordingly, achieving high measurement precision while managing complexity through integrated control algorithms.
2Productivity
If power is delivered in continuous bursts, then emulsification efficiency is improved, but overheating and turbulence occur reducing surgical precision
Solution Approach 1:
The system employs periodic power delivery with variable duty cycles, alternating between power bursts for emulsification and pause periods for cooling and aspiration. The non-linear custom mode optimizes the timing and duration of these periodic cycles based on real-time acoustic and temperature feedback, maintaining high emulsification efficiency while preventing overheating and fluid turbulence.
Solution Approach 2:
The system maintains continuous useful action by coordinating power delivery, aspiration, and irrigation in a continuous cycle. The non-linear custom mode ensures that emulsification power is delivered continuously when needed while seamlessly integrating aspiration phases to remove debris and cooling phases to manage temperature, eliminating idle time while preventing harmful effects.
3Adaptability or versatility
If fixed power levels are applied, then the system is easy to operate, but it cannot adapt to varying surgical needs reducing versatility
Solution Approach 1:
The non-linear custom mode implements self-service by automatically adapting power delivery to varying surgical conditions without requiring manual intervention. The system uses acoustic feedback, temperature sensors, and pressure input to autonomously adjust power levels, rates of increase, and rates of decrease, providing high adaptability while maintaining ease of operation through automated decision-making algorithms.
Solution Approach 2:
The system changes multiple parameters simultaneously including power levels, duty cycles, aspiration rates, and irrigation flow based on real-time conditions. The non-linear custom mode dynamically adjusts these parameters in coordination, allowing the system to adapt to varying surgical needs while presenting a unified simple interface through the footpedal, resolving the contradiction between versatility and ease of operation.
4Productivity
If power delivery rates are increased to reduce surgery time, then productivity improves, but turbulence and fluid usage increase creating harmful effects
Solution Approach 1:
The system dynamically adjusts power delivery rates based on real-time acoustic feedback and surgical conditions. The non-linear custom mode optimizes the rate of power increase and decrease to achieve rapid emulsification while preventing fluid turbulence by coordinating power delivery with aspiration and irrigation rates, maintaining high productivity without generating harmful effects.
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 provides advanced control over ultrasonic power delivery, reducing inefficiencies and improving surgical precision by allowing surgeons to tailor power delivery to specific surgical needs, minimizing overheating and fluid usage, and ensuring optimal emulsification and aspiration processes.
Implementation Method 1
the handpiece may be interconnected with the control console by an electric cable for powering and controlling the piezoelectric transducer that provides the emulsification
Implementation Method 2
a needle that is ultrasonically driven, in order to emulsify, i.e., to liquefy, the natural crystalline lens
Data Source
AI summary
The disclosed apparatus, system and method may include at least a phacoemulsification surgical console having a customizable non-linear custom phacoemulsification mode. The apparatus, system and method may include an ultrasonic delivery tip; a foot pedal; and 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 ultrasonic delivery tip corresponded to the received percentage foot pedal actuation; and dictating the calculated percentage actuation for the ultrasonic delivery tip actuation to the ultrasonic delivery tip.