Capsulotomy Tip with Suction Hydrodissection for PCO Reduction
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Solution Overview
Problem
Posterior capsule opacification (PCO) occurs after cataract surgery due to lens epithelial cell proliferation, and current treatments are costly and cause dysphotopsia, while hydrodissection is uneven and adds complications to the surgery.
Innovation Solution
A surgical device with a suction cup and cutting element performs capsulotomy, delivering pressurized fluid to evenly separate the lens from the capsule, reducing PCO and simplifying hydrodissection, and can be used with non-square edged IOLs to minimize dysphotopsia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If square-edged IOLs are used to reduce PCO, then PCO prevention is improved, but dysphotopsia increases
Solution Approach 1:
The patent applies curvature by replacing square-edged IOLs with round-edged IOLs. The rounded edges eliminate the sharp corners that cause light reflection and dysphotopsia while maintaining the IOL's ability to prevent PCO through its overall design and positioning in the capsular bag.
2Ease of operation
If manual hydrodissection is performed, then lens separation is achieved, but surgical time and complexity increase
Solution Approach 1:
The patent merges hydrodissection functionality into the capsulotomy device itself. The capsulotomy device includes both cutting elements for capsulotomy and fluid delivery capability for hydrodissection, allowing both functions to be performed with a single instrument rather than requiring separate manual steps.
Solution Approach 2:
The capsulotomy device is designed with multi-functionality, serving both to perform capsulotomy (cutting the capsule) and hydrodissection (separating the lens from the capsule using fluid). This universal design eliminates the need for separate instruments and steps, reducing surgical time and complexity.
3Ease of operation
If manual hydrodissection is used, then lens capsule separation is achieved, but fluid delivery uniformity worsens
Solution Approach 1:
The fluid delivery system is segmented into multiple outlets arranged circumferentially around the capsulotomy device. This segmentation allows fluid to be delivered uniformly at multiple points around the lens capsule simultaneously, achieving even separation without manual manipulation.
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 effectively reduces PCO occurrence and simplifies hydrodissection, minimizing surgical complications and dysphotopsia by evenly delivering fluid and using non-square edged IOLs.
Implementation Method 1
The capsulotomy tip includes a suction cup that utilizes suction for creating pressure to the cutting element and subsequently to the capsule of the eye. The suction is applied via the console, tubing, and suction cup thus securing the capsulotomy tip to the eye of the patient.
Implementation Method 2
Pressurized fluid via a fluid delivery mechanism, such as a hand held roller dispenser, is delivered to the capsulotomy tip and the suction cup. The pressurized fluid entering the suction cup and tip, causes the cup and tip to be easily removed from the eye of the patient.
Implementation Method 3
after the capsulotomy tip is secured to the lens capsule of the eye, a cutting element included in the capsulotomy tip is used to cut tissue of the eye of the patient. Pressurized fluid via a fluid delivery mechanism... is delivered to the capsulotomy tip
Data Source
AI summary
Embodiments of the invention provide hydrodissection and/or PCO prevention or reduction in a patient undergoing eye surgery. In one embodiment, the invention is a surgical device for cutting and excising a portion of tissue, for example in performing a lens capsulotomy. A capsulotomy tip is inserted into an eye through an incision in the surface of the eye. The capsulotomy tip includes a suction cup to provide suction to the lens capsule. Then suction is applied via the suction cup to secure the capsulotomy tip to the eye. In some embodiments, after the capsulotomy tip is secured to the lens capsule, a cutting element of the capsulotomy tip is used to cut a tissue of the eye. Fluid is pushed through the capsulotomy tip and the capsulotomy tip is removed from the eye. Moreover, disclosed is an intraocular lens (IOL) to be used in conjunction with the surgical device.