Intraocular Lens Injector With Dual Push-Twist Delivery Modes
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Solution Overview
Problem
Existing intraocular lens delivery systems lack flexibility in delivery modes, often requiring complex manipulation and multiple devices for different surgical needs, which can complicate procedures and prolong healing times.
Innovation Solution
A dual-mode delivery system for intraocular lenses that integrates both single-handed push and two-handed push and twist options, utilizing a plunger key with multiple positions to facilitate secure storage, axial sliding, and rotational advancement, allowing surgeons to choose the most suitable delivery method based on preference or circumstances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single delivery system provides multiple delivery modes (push and twist), then adaptability is improved, but device complexity increases
Solution Approach 1:
The delivery system is designed to perform multiple functions through a single integrated apparatus. The push rod can operate in two distinct modes: axial pushing for straight delivery and rotational twisting for spiral delivery. This multi-functionality allows the same device to adapt to different surgical scenarios and surgeon preferences without requiring separate delivery systems for each mode.
Solution Approach 2:
The system incorporates dynamic elements that allow it to switch between different operational states. The plunger key mechanism can be positioned in different locations along the push rod, and the connection between the plunger and push rod can be engaged or disengaged. This dynamic reconfiguration enables the system to transition between push-only mode and twist-capable mode, providing adaptability while maintaining a relatively simple base structure.
2Ease of operation
If the plunger key has multiple positions for different delivery modes, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The plunger key mechanism is designed to be self-indicating and self-configuring. When the plunger key is positioned at different locations, it automatically engages or disengages the appropriate connection features on the push rod. The system provides tactile feedback and visual cues that help the surgeon understand the current mode without requiring additional controls or complex interfaces. The mechanism essentially configures itself based on the plunger key position.
Solution Approach 2:
The plunger key mechanism is divided into distinct functional segments: the plunger key itself, the connection interface with the push rod, and the positioning features along the push rod. Each segment has a specific function, and their coordinated interaction enables mode selection. This segmentation allows the complex function of mode selection to be achieved through simple, modular components rather than a monolithic complex mechanism.
Data Source
AI summary
An apparatus for eye surgery. Some embodiments may comprise a housing, a bore through the housing, and a push rod at least partially disposed in the bore. The push rod may be operable to move between three rod positions within the bore. A plunger key may be coupled to the housing and operable to move between three key positions. In the first key position, the plunger key may prevent the push rod from moving from a first rod position. In the second key position, the plunger key may allow the push rod to slide through the bore from the first rod position to a second rod position. In the second key position, the plunger key may also allow the push rod to be rotated to advance to a third rod position. In the third key position, the plunger key may allow the push rod to slide through the bore from the second rod position to the third rod position.