Cross-Blade Surgical Scissors for Circular Lens Capsule Incision
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Solution Overview
Problem
Conventional surgical scissors for incising the anterior capsule of a lens have a straight shape, making it difficult to form a circular incision, which can lead to uneven contraction of the lens capsule and deformation or misalignment of the artificial lens.
Innovation Solution
Surgical scissors with a first and second lever arranged in a crossing direction, featuring a first and second cutting part that incise the anterior capsule in a direction perpendicular to the entry direction, facilitated by a rotation shaft connecting the levers, allowing for a circular incision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If straight-type incision scissors are used, then the structure is simple and easy to manufacture, but it is difficult to form a circular incision and achieve uniform contraction of the lens capsule
Solution Approach 1:
The cutting edge of the surgical scissors is designed with a curved shape instead of a straight line, allowing the incision to follow a circular path. The curved cutting edge enables the surgeon to create a circular incision in the anterior capsule, which is essential for uniform contraction and proper positioning of the artificial lens.
2Manufacturing precision
If straight cut is made with conventional scissors, then the incision process is simple, but the opening position shifts and the artificial lens becomes deformed
Solution Approach 1:
The curved cutting edge guides the incision along a precise circular path, ensuring that the opening is accurately positioned at the center of the anterior capsule. This curved geometry prevents deviation from the intended incision path, maintaining high positional accuracy while remaining relatively easy to operate.
3Stability of the object's composition
If additional incision is made to form circular shape, then uniform contraction of lens capsule is achieved, but the incision process becomes more complex and time-consuming
Solution Approach 1:
The curved cutting edge allows the surgeon to create a circular incision in a single continuous motion, achieving uniform contraction of the lens capsule without requiring multiple separate incision steps. This design efficiency reduces the time required while ensuring stable and uniform capsule contraction.
Data Source
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AI summary
Surgical scissors for incising anterior capsule of lens include first and second levers extending in front-rear direction and rotation shaft rotatably connecting first and second levers to each other. First lever includes: first handle formed at rear portion with reference to rotation shaft; first blade having first non-cutting part formed at front portion with reference to rotation shaft and extending forward, and first cutting part protruding in one side direction crossing front-rear direction and up-down direction from front end of first non-cutting part. Second lever includes: second handle formed at rear portion with reference to rotation shaft and capable of being spaced downward from first handle; second blade having second non-cutting part formed at front portion with reference to rotation shaft and extending forward, and second cutting part protruding in one side direction from front end of second non-cutting part to be in contact with first cutting part.