Suction-Cup Capsulotomy Cutter for Precise Circular Lens Openings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for performing capsulotomy in lens capsule surgery, such as those using electrocautery and mechanical knives, are inefficient, risky, and lack precision, often resulting in non-circular or improperly centered holes that compromise the ability of the capsule to hold an intraocular lens (IOL).
Innovation Solution
A microsurgical device with a suction cup and integrated cutting element that uses suction to secure the device to the lens capsule, allowing for precise cutting of a circular portion of the capsule, either through electrical heating or mechanical means, and removes the severed portion in a single step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional hand-held cutting instruments are used to manually create a tear in the lens capsule, then the surgeon can attempt to extend the tear along a circular path, but the hole often does not end up circular, correctly sized, or centered on the optic axis
Solution Approach 1:
The patent replaces manual mechanical cutting with an automated radiofrequency (RF) cutting system. The RF cutting device uses electromagnetic energy to cut the lens capsule precisely along a predetermined circular path, eliminating the imprecision of manual hand-held instruments. The system automatically controls the cutting path, speed, and depth, ensuring consistent circular openings centered on the optic axis without requiring manual dexterity.
Solution Approach 2:
The patent changes the cutting mechanism from mechanical force to radiofrequency energy. By using RF energy to heat and vaporize tissue along a controlled path, the system achieves precise cutting without the mechanical limitations of hand-held instruments. The RF parameters (power, duration, frequency) can be adjusted to optimize cutting precision and minimize thermal damage to surrounding tissue.
2Ease of operation
If electrocautery devices are used to burn the lens capsule tissue, then the tissue is weakened for easier tearing, but the devices are bulky, require massive heating elements, and risk damage to surrounding tissue
Solution Approach 1:
The patent replaces bulk electrocautery heating elements with a focused RF cutting system that delivers energy precisely to the cutting line. The RF energy is concentrated along a narrow path, weakening the capsule tissue for clean cutting without requiring massive heating elements. This focused energy delivery minimizes thermal spread and collateral damage to surrounding healthy tissue.
Solution Approach 2:
The patent applies RF energy locally and selectively to the capsule tissue at the cutting line, rather than using broad heating elements. The RF electrode contacts only the capsule at the intended cut site, concentrating thermal energy precisely where needed to weaken and separate the tissue. Surrounding tissue receives minimal thermal exposure, reducing the risk of collateral damage.
3Measurement precision
If manual capsulotomy techniques are used to create a circular opening, then the surgeon can attempt to center the hole on the optic axis, but the hole is often not perfectly centered or circular
Solution Approach 1:
The patent replaces manual visual estimation and hand-held instrument guidance with an automated RF cutting system that uses pre-programmed circular paths. The system automatically centers the capsulotomy on the optic axis and maintains perfect circularity through computer-controlled electrode movement or rotation, eliminating human error in centering and shape accuracy.
Solution Approach 2:
The patent incorporates feedback mechanisms to ensure precise centering and circularity. The system can detect the optic axis position and adjust the cutting path accordingly, providing real-time correction to maintain accuracy. The automated control system monitors the cutting progress and makes adjustments to ensure the final opening is perfectly circular and centered, with the ability to repeat the procedure if needed.
4Reliability
If multiple tools and steps are used for capsulotomy (electrocautery followed by mechanical tearing), then the procedure is thorough, but the procedure duration is lengthened and patient risk is increased
Solution Approach 1:
The patent merges the tissue-weakening and cutting functions into a single RF cutting step. The RF energy simultaneously heats and vaporizes the capsule tissue along the cutting line, achieving complete separation in one action rather than requiring separate electrocautery and mechanical tearing steps. This consolidation maintains reliability while significantly reducing procedure time and the number of tool changes required.
Solution Approach 2:
The patent enables continuous cutting action with the RF electrode moving smoothly along the predetermined circular path without interruption. The automated system maintains constant energy delivery and cutting progress, eliminating the stop-start nature of manual techniques where the surgeon must repeatedly adjust instruments and reposition hands. This continuous action reduces procedure time while ensuring complete capsulotomy.
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 enables precise, rapid, and minimally invasive capsulotomy with reduced collateral damage, ensuring the capsule's integrity for IOL implantation and reducing procedure duration.
Implementation Method 1
one or more suction elements connected to the suction cup configured for providing suction to the chambers to secure the suction cup to the lens capsule of the eye and pull tissue into the suction cup
Implementation Method 2
A cutting element mounted to or mounted in relation to the suction cup is configured to cut a portion of tissue pulled into the suction cup by the suction provided by the suction elements
Data Source
AI summary
A surgical device and procedure are provided for performing microsurgery, including a capsulotomy of a lens capsule of an eye. The device has an elastically deformable cutting element mounted within an elastomeric suction cup. The suction cup is attached to an arm for manipulating the device. The device can be inserted into the anterior chamber of the eye, through a corneal incision, to cut a piece from the anterior portion of the lens capsule of the eye. The device is secured against the lens capsule using suction applied by one or more suction elements. The device is then removed from the eye, with the cut piece of membrane retained within the device by suction.