Capsulotomy Loop Deployment for Precise Circular Lens Incisions
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Solution Overview
Problem
Existing capsulorhexis devices struggle to make precise, circular incisions in the crystalline lens capsule due to limitations in size control, circularity, and ease of use, often requiring multiple insertions and risking damage to surrounding tissues.
Innovation Solution
A capsulorhexis device with an elastic and conductive loop, a moving member, and a nozzle-type insertion guide, allowing the loop to be stored without deformation, unfold for incision, and maintain a circular shape, featuring guide channels to prevent torsional deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional needle-based incision tool is used to scrape off the front surface of the crystalline lens capsule, then the incision can be made, but it requires multiple insertions and movements, making it difficult to achieve constant size and circularity, and increasing the risk of damage to surrounding tissues
Solution Approach 1:
The patent replaces the conventional mechanical needle-based scraping method with an ultrasonic vibration-based incision system. The incision loop vibrates at ultrasonic frequencies to cut the crystalline lens capsule, eliminating the need for manual scraping movements. This substitution provides precise control over incision geometry while reducing operational complexity and time.
Solution Approach 2:
The patent changes the operational parameters from manual mechanical scraping to controlled ultrasonic vibration with specific frequency and amplitude. The ultrasonic parameters allow the incision loop to cut through the capsule precisely without requiring multiple insertions, achieving constant size and circularity while reducing operation time and complexity.
2Productivity
If multiple scraping movements are performed to remove the front surface of the crystalline lens capsule, then the incision can be completed, but the surgery time increases and the quality depends greatly on operator skill
Solution Approach 1:
The patent replaces skill-dependent manual scraping with an automated ultrasonic vibration system. The consistent ultrasonic parameters ensure reliable and consistent incision quality regardless of operator skill level, while the single-insertion design significantly reduces surgery time compared to multiple scraping movements.
3Ease of operation
If a bent connecting part is used in the insertion sleeve and loop structure, then insertion through the corneal incision site is facilitated, but the loop cannot be stored without deformation and is difficult to control during insertion
Solution Approach 1:
The patent divides the insertion system into separate functional components: a straight insertion sleeve for stable storage and control, and a loop structure that is deployed after insertion. The incision loop is stored in an unfolded state within the insertion sleeve, maintaining its shape stability, and is then inserted as a unit through the corneal incision site without requiring pre-bending.
Solution Approach 2:
The patent prepares the incision loop in its final circular shape before insertion by storing it in the insertion sleeve in an unfolded state. This preliminary preparation ensures the loop maintains its shape stability during storage and insertion, eliminating the need for post-insertion shaping while facilitating easy insertion through the corneal site.
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 ensures safe, convenient, and high-quality circular incisions in the crystalline lens capsule, reducing operation time and preventing tissue damage.
Implementation Method 1
a loop (110) having elasticity and conductivity
Implementation Method 2
a loop (110) having elasticity and conductivity
Data Source
AI summary
A capsulorhexis device is inserted into an incision site of a cornea to make an incision in an anterior capsule surrounding a crystalline lens. The capsulorhexis device includes a loop having elasticity and conductivity; a moving member having one end fixed and coupled to the loop; an insertion guide configured so that, while the incision is being made in the crystalline lens capsule, a front end thereof is inserted into the incision site of the cornea; and a housing having one end coupled to a rear end of the insertion guide, wherein the loop is housed in the housing and, to make the incision in the crystalline lens capsule, slides in the housing together with the moving member to pass through the insertion guide and be deployed into an anterior chamber of the eye.