Superelastic Wire Loop Capsule Polishing Device
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Solution Overview
Problem
Posterior capsule opacification (PCO) occurs after cataract surgery due to the buildup of lens epithelial cells, which can inhibit vision and dislocate intraocular lenses (IOLs), and existing methods are inadequate in effectively addressing this issue.
Innovation Solution
A capsule polishing device featuring a resistive-heating element with a superelastic wire loop that combines hyperthermia and mechanical abrasion to destroy and remove lens epithelial cells, utilizing a temperature range of 40 to 47 degrees Celsius and a roughened surface for enhanced mechanical abrasion, while maintaining contact with the capsule surface without puncturing it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods are used to address posterior capsule opacification, then lens epithelial cells remain on the capsule surface, but attempting to remove them may cause collateral damage to surrounding tissue
Solution Approach 1:
The resistive-heating element is designed to deliver localized thermal energy specifically to lens epithelial cells on the capsule surface, heating them to 40-47°C to induce hyperthermia and cell destruction while leaving surrounding healthy tissue unaffected. The element can be positioned and activated selectively to treat only the affected areas.
Solution Approach 2:
The invention controls the temperature parameter precisely within the 40-47°C range to achieve therapeutic hyperthermia that destroys lens epithelial cells without causing thermal damage to surrounding capsule tissue. This controlled parameter change enables selective cell destruction while preserving healthy structures.
2Illumination intensity
If a smooth capsule surface is maintained, then vision clarity is improved, but lens epithelial cells continue to proliferate and cause PCO
Solution Approach 1:
The device combines two therapeutic mechanisms into one integrated system: resistive heating to destroy lens epithelial cells through hyperthermia, and mechanical abrasion via the roughened surface to physically remove cellular debris and prevent regrowth. This combination addresses both vision clarity and prevention of PCO recurrence.
Solution Approach 2:
The invention replaces traditional mechanical polishing methods with a resistive-heating-based system that uses thermal energy to destroy cells, supplemented by controlled mechanical abrasion. This substitution allows for more precise control over tissue interaction and reduces the risk of unintended mechanical damage.
3Stability of the object's composition
If the capsule polishing device is made rigid for structural stability, then it maintains shape during operation, but it cannot adapt to the curved contour of the capsule bag
Solution Approach 1:
The polishing device employs a superelastic wire loop that can dynamically change its shape and flexibility. The wire can be deformed to match the capsule's contour during insertion and operation, then returns to its original shape when needed. This dynamic property allows the device to adapt to varying capsule geometries while maintaining structural integrity.
Solution Approach 2:
The device uses a flexible superelastic wire loop instead of a rigid structure. This flexible configuration allows the wire to conform to the curved surface of the capsule bag, ensuring uniform contact and effective treatment across the entire capsule surface while maintaining the necessary mechanical strength.
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
Effectively prevents PCO by destroying and removing lens epithelial cells through hyperthermia and mechanical abrasion, ensuring clear vision and stable IOL placement without collateral damage to surrounding tissue.
Implementation Method 1
a resistive-heating element including an electrically resistive, superelastic wire forming a loop... The loop may be heated to approximately 40 to 47 degrees Celsius to destroy LECs
Implementation Method 2
The loop may include a roughened surface to increase mechanical abrasion... perform active capsule polishing through a combination of hyperthermia of LECs and mechanical abrasion of the capsule surface
Data Source
AI summary
Various embodiments of a capsule polishing device include a resistive-heating element including an electrically resistive, superelastic wire forming a loop between first and second ends of the superelastic wire. The first and second ends of the loop may at least partially extend from a planar face defined by the loop, to an insulating portion. In some embodiments, the capsule polishing device may be configured to perform active capsule polishing through a combination of hyperthermia of LECs and mechanical abrasion of the capsule surface. In some embodiments, at least a side and end portion of the loop of the capsule polishing device may be shaped to follow a contour of the capsule bag. The loop may be heated to approximately 40 to 47 degrees Celsius to destroy LECs (other temperatures are also possible). In some embodiments, the loop may include a roughened surface to increase mechanical abrasion.