Capsulotomy Device With Oscillating Blade for Precise Capsule Cutting
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Solution Overview
Problem
Existing capsulotomy devices for cataract surgery often require complex mechanisms to achieve smooth and continuous cuts in the lens capsule, risking unintentional tears and are inefficient in their operation.
Innovation Solution
A capsulotomy device with a tool holder featuring a circular cutting blade that oscillates rotationally through a simple mechanism, utilizing an axially extending rod to induce rotational oscillations of the blade, allowing for precise cutting of the lens capsule with fewer parts and simpler construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex mechanism is used to achieve smooth and continuous cuts in the lens capsule, then cutting precision is improved, but device complexity increases
Solution Approach 1:
The patent employs oscillating rotational movement of the cutting blade through a mechanical vibration mechanism. The blade is rotated back and forth through a controlled oscillation range (e.g., ±15 degrees) to create a sawing action that produces smooth, continuous cuts in the lens capsule. This vibration-based approach achieves high cutting precision without requiring complex multi-component mechanisms, as the oscillation itself generates the necessary cutting forces.
Solution Approach 2:
The cutting blade is designed with dynamic oscillating rotation rather than static or unidirectional rotation. The blade's rotational axis is fixed, but the blade itself oscillates dynamically within a controlled angular range. This dynamic movement allows the blade to engage and disengage periodically from the capsule tissue, creating a controlled cutting action that maintains precision while simplifying the overall device structure compared to continuous rotation mechanisms.
2Ease of manufacture
If a simple mechanism is used to reduce device complexity, then ease of manufacture is improved, but cutting precision may deteriorate
Solution Approach 1:
The oscillating blade mechanism achieves high cutting precision through a relatively simple vibrational mechanism. The blade's back-and-forth rotation within a controlled angular range (e.g., ±15 degrees) creates effective cutting action without requiring complex guidance systems or multiple blades. This simple oscillating mechanism produces smooth, continuous cuts while maintaining ease of manufacture, as the design involves minimal components and straightforward manufacturing processes.
3Productivity
If oscillating rotation of the cutting blade is implemented, then cutting efficiency is improved, but mechanism complexity increases
Solution Approach 1:
The oscillating blade mechanism improves cutting efficiency by creating a sawing action through controlled back-and-forth rotation. The blade oscillates within a specific angular range (e.g., ±15 degrees) to maximize cutting effectiveness. This vibrational mechanism achieves high productivity without requiring complex control systems, as the oscillation can be generated through simple mechanical linkages or even manual operation, thereby maintaining low mechanism complexity while maximizing cutting efficiency.
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 device provides efficient and precise cutting of the lens capsule with minimal risk of tears, utilizing a simple mechanism that reduces complexity and enhances surgical control.
Implementation Method 1
at least a portion of the tool holder is adapted in the device's operative state to reciprocate in the distal and proximal directions to urge oscillating rotation of the cutting blade
Implementation Method 2
by reciprocating axial movements of the rod, rotational oscillations of the cutting blade may be urged about a central pivot of the cutting blade
Data Source
AI summary
A capsulotomy device has a tool holder. The tool holder includes a cutting blade at its distal end and is arranged to move in a distal direction in the device to form an operative state of the device where the cutting blade projects out of a distal end of the capsulotomy device. The at least a portion of the tool holder is adapted in the device's operative state to reciprocate in the distal and proximal directions to urge rotation of the cutting blade.