Capsular Tension Ring Insertion With Dual Hooks for One-Handed Placement
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Solution Overview
Problem
Existing capsular tension ring insertion devices are difficult to use, often requiring both hands and can stress the fragile Zinn's membrane during cataract surgery, risking tears in the capsular bag.
Innovation Solution
A capsular tension ring insertion device with an external and internal hook mechanism, allowing single-handed operation, featuring a spiral insertion method that avoids stress on the capsular bag by gradually releasing the ring into the intraocular space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a capsular tension ring is inserted using traditional insertion devices, then the ring can be placed into the capsular bag, but the device requires both hands to operate and stresses the fragile Zinn's membrane, risking tears in the capsular bag
Solution Approach 1:
The insertion device is divided into separate functional components: a handle portion, a shaft portion, and a deployment mechanism with movable jaw members. This segmentation allows the device to be manipulated with one hand while the deployment process is controlled through mechanical actuation rather than manual manipulation of the entire device
Solution Approach 2:
The deployment mechanism uses spring-loaded jaw members that automatically engage with the capsular tension ring and control its expansion. The elastic element provides automatic tensioning and release, eliminating the need for continuous manual force application and reducing stress on the capsular bag during the insertion process
2Productivity
If a capsular tension ring is inserted using traditional devices, then the ring can be placed, but the insertion process places stress on the Zinn's membrane and capsular bag
Solution Approach 1:
The capsular tension ring is pre-loaded onto the insertion device in a compressed, low-profile configuration before insertion. This preliminary positioning allows the ring to be introduced into the capsular bag without stress, and only after proper placement does the ring expand to its functional shape
Solution Approach 2:
The deployment mechanism is designed to control the expansion of the capsular tension ring gradually through spring-loaded jaw members. This controlled expansion prevents sudden stress on the capsular bag and Zinn's membrane, cushioning the transition from inserted to expanded state
3Ease of operation
If a capsular tension ring is inserted using traditional devices, then the ring can be placed, but the device is difficult to maneuver for precise placement
Solution Approach 1:
The deployment mechanism transforms the insertion process from a two-handed manual manipulation task into a one-handed operation with controlled mechanical actuation. The jaw members move along the shaft portion, providing precise control in the longitudinal dimension while the handle provides ergonomic grip, effectively adding a mechanical control dimension to the operation
Data Source
AI summary
An insertion device for inserting a capsular tension ring into the intraocular space of a patient's eye during cataract surgery includes a main body and a tube extending from a first end of the main body. The device also has an external hook attached to an outside surface of the tube at a first end of the tube which is farthest away from the main body, and an internal hook attached to a push mechanism. The external hook extends beyond the first end of the tube and the internal hook is moveable with respect to the tube. When the push mechanism is in a first position, the internal hook is within the tube, and when the push mechanism is in a second position, the internal hook extends beyond the first end of the tube.