Capsulotomy Device Beveled Sleeve and Notched Loop
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current capsulotomy devices face challenges in minimizing capsular tears and ensuring predictable motion within the eye during cataract surgery, particularly when performing posterior capsulotomy, as they lack optimal geometry and can lead to complications like radial tears and vitreous intrusion.
Innovation Solution
A capsulotomy device featuring a tubular insertion sleeve with beveled and notched distal ends, a resistive heating element with a superelastic loop, and an insulating portion, allowing for precise and controlled capsularhexis with reduced risk of tears and improved motion predictability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional capsulotomy device is used, then the device can perform capsulotomy, but it may cause capsular tears and radial tears extending into the posterior capsule
Solution Approach 1:
The patent changes the geometric parameters of the loop and its deployment characteristics. The loop is designed with specific dimensions and deployment speed control to ensure it creates a controlled hexis rather than uncontrolled tears, thereby maintaining capsular integrity while performing capsulotomy.
Solution Approach 2:
The patent employs dynamic deployment of the loop where the loop expands progressively rather than instantaneously. This controlled dynamic expansion allows the capsule to yield gradually, preventing sudden tears and maintaining reliability during the capsulotomy procedure.
2Productivity
If the capsule is opened with numerous small capsular tears, then capsulotomy is achieved, but small tags may lead to radial capsular tears extending into the posterior capsule
Solution Approach 1:
The patent optimizes the loop geometry parameters including its size, shape, and deployment characteristics to create a controlled hexis with smooth edges rather than numerous small tears. This parameter optimization ensures productive capsulotomy completion while maintaining capsular stability by preventing tag formation.
3Adaptability or versatility
If current capsulotomy devices are used for posterior capsulotomy, then the procedure can be performed, but the device geometry is not optimal for posterior capsulotomy
Solution Approach 1:
The patent designs a loop device with universal geometric characteristics that can effectively perform both anterior and posterior capsulotomy. The loop's dimensions, shape, and deployment mechanism are optimized to be adaptable to different capsule locations, providing versatile functionality while maintaining geometric precision for both procedures.
4Ease of operation
If a loop is deployed in the eye, then capsulotomy can be performed, but the motion of the loop is not predictable
Solution Approach 1:
The patent employs controlled dynamic deployment where the loop expands in a predictable manner within the eye. The deployment mechanism and loop design ensure predictable motion characteristics, allowing the surgeon to control the loop's behavior while maintaining ease of operation during capsulotomy.
Solution Approach 2:
The patent designs the loop with symmetric geometric properties that create equipotential deployment characteristics, ensuring predictable and uniform expansion in all directions. This geometric optimization provides reliable motion predictability while maintaining ease of operation during the procedure.
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 minimizes capsular tears and ensures predictable loop motion, enhancing the safety and efficacy of cataract removal and intraocular lens placement by providing optimal geometry for both anterior and posterior capsulotomy procedures.
Implementation Method 1
the heating element is a resistive heating element
Implementation Method 2
the resistive heating element is formed of a nickel titanium alloy
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3E
AI summary
The present disclosure provides a capsulotomy device having a unique insertion sleeve configuration comprising beveling and two notches at the distal end of the insertion sleeve. The unique configuration assures that the motion the capsulotomy loop comprising the heating element goes through during deployment from and retraction into the insertion sleeve is minimized and predictable.