Vitreous Body Cutter With Adjustable Protrusion
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Solution Overview
Problem
Existing vitreous body cutters with small pipe diameters face difficulties in moving the opening position widely within the eyeball due to rigidity issues, restricting the range of vitreous body suction and leading to potential residual vitreous body remnants.
Innovation Solution
A unified vitreous body cutter and cannula system with a sliding power output section and adjustable protrusion length, allowing for wide movement of the opening and enhanced suction range, even with thin pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the pipe diameter is reduced to minimize invasiveness, then the rigidity of the pipe deteriorates, making it difficult to move the opening position widely within the eyeball
Solution Approach 1:
The pipe is designed with a dynamic structure that allows it to bend at predetermined positions. This enables the thin pipe to adapt its shape and reach wider areas within the eyeball, overcoming the rigidity limitation while maintaining a small diameter for minimal invasiveness.
Solution Approach 2:
The pipe is divided into multiple sections with predetermined bendable positions. This segmentation allows the pipe to flex and change its configuration, enabling the opening to be positioned at multiple locations within the eyeball despite the pipe's thin diameter.
2Weight of moving object
If the pipe diameter is reduced, then the invasiveness is minimized, but the range of suction for vitreous bodies is restricted
Solution Approach 1:
The dynamic bending capability of the pipe allows the opening to access a broader volume within the eyeball. By flexing to predetermined positions, the thin pipe compensates for its limited diameter, maintaining an adequate suction range while minimizing invasiveness.
3Weight of moving object
If the pipe is made thin for minimal invasiveness, then the rigidity is reduced, requiring eyeball movement for operation
Solution Approach 1:
The pipe incorporates predetermined bendable positions that provide built-in flexibility. This dynamic structure allows the thin pipe to adapt its shape independently, reducing the need for eyeball movement while maintaining operational versatility and minimal invasiveness.
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
There is provided a vitreous body cutter that allows wide movement of an opening position at the end part of a pipe even when the pipe is thin and that allows suction of vitreous bodies etc. in a wide range. The vitreous body cutter (10) includes: a pipe (20) having an opening (21) on the side of an end part; a cutter (30), which slides along the inner surface of the pipe (20); a power output section (25), which is connected to the pipe (20) and slides the cutter (30); and an outer case (40), through which the pipe (20) passes, and which includes the power output section (25) inside; and further includes a joint (41) for connecting the outer case (40) to a cannula (50) attached to an eyeball (60). The protrusion length of the pipe (20) from the outer case (40) can be changed.