Phacoemulsification Vacuum Control for Anterior Chamber Stability
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Solution Overview
Problem
Current phacoemulsification systems lack effective methods for managing intraocular pressure (IOP) during surgery, particularly in managing occlusions and post occlusion surges, which can lead to uncontrolled changes in anterior chamber stability and increased risk of eye collapse.
Innovation Solution
A surgical console with a vacuum system that provides adjustable vacuum pressure settings, including a first and second pressure threshold, alerts the user to excessive vacuum pressure, and automatically reduces pressure to prevent occlusion-related surges, utilizing in-line pressure sensors for real-time monitoring and algorithm-driven adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vacuum pressure is increased to improve aspiration of emulsified lens material, then productivity is improved, but the risk of occlusion and post-occlusion surge increases which worsens reliability
Solution Approach 1:
The system continuously monitors vacuum pressure through pressure sensors and provides real-time feedback to the control module. When the vacuum pressure approaches the occlusion threshold, the system automatically reduces the vacuum pressure to prevent occlusion, thereby maintaining anterior chamber stability while allowing high productivity during normal operation.
Solution Approach 2:
The vacuum pressure is made dynamically adjustable rather than fixed. The control module automatically modifies the vacuum pressure level based on real-time monitoring data, transitioning between high pressure (for productivity) and low pressure (for safety) states, thus resolving the contradiction between aspiration efficiency and occlusion prevention.
2Reliability
If vacuum pressure is continuously monitored to detect occlusion, then reliability is improved, but device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The pressure sensor serves multiple functions: it monitors vacuum pressure levels, detects occlusion events by comparing pressure against thresholds, and provides data for automatic vacuum pressure adjustment. This multi-functionality reduces the need for separate detection systems, thereby limiting the increase in device complexity while maintaining high reliability.
Solution Approach 2:
The system performs self-diagnosis and self-correction by automatically detecting occlusion through pressure monitoring and autonomously adjusting vacuum pressure without requiring external intervention. This self-service capability enhances reliability while minimizing the need for complex external control systems.
3Stability of the object's composition
If automatic vacuum pressure reduction is implemented to prevent occlusion, then anterior chamber stability is improved, but ease of operation decreases due to reduced manual control
Solution Approach 1:
The automatic control system does not completely replace manual control but intervenes partially only when necessary (when occlusion risk is detected). During normal operation, the surgeon maintains full manual control, and the automatic system activates only to prevent harmful conditions, thus preserving ease of operation while ensuring stability when needed.
Solution Approach 2:
Instead of requiring the surgeon to manually detect and respond to occlusion conditions, the system inverts the control paradigm by having the machine automatically monitor and adjust parameters. This inversion enhances stability while maintaining ease of operation because the automatic system handles only safety-critical adjustments rather than all control functions.
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 fluidics control during phacoemulsification surgery, improving anterior chamber stability and reducing the risk of occlusion-related complications by providing precise IOP management and occlusion detection.
Implementation Method 1
a vacuum system capable of providing vacuum pressure between a minimum pressure and a maximum pressure
Implementation Method 2
providing a vacuum pressure between a minimum pressure and a maximum pressure
Implementation Method 3
utilizing in-line pressure sensors for real-time monitoring
Data Source
AI summary
The present invention provides a system for managing occlusions during phacoemulsification surgery. More specifically, the present invention provides a user of a surgical console an alert when a partial or full occlusion of a surgical tool causes the vacuum pressure to become greater than a predetermined pressure threshold setting and automatically reduces the vacuum pressure when the predetermined pressure threshold setting is exceeded.