Surgical Bur Liquid Flow Generation for Clearer Tissue Removal
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Solution Overview
Problem
Existing surgical burs obstruct the surgeon's view during tissue removal due to cut tissue floating in perfusion fluid, leading to reduced safety, accuracy, and speed of the operation.
Innovation Solution
A surgical bur with a liquid flow generation part, such as a spiral protrusion on its shaft, generates a flow in perfusion fluid to clear the view by removing tissue fragments and ensuring continuous perfusion fluid supply around the cutting area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perfusion fluid is supplied around the removal target position, then tissue removal function is maintained, but the surgeon's view is obstructed by floating cut tissue
Solution Approach 1:
The shaft is segmented into functional zones: an upper portion for tissue removal and a lower liquid flow generation portion for fluid circulation. This segmentation allows independent optimization of cutting performance and fluid management, resolving the contradiction between maintaining tissue removal function and ensuring clear surgical view.
Solution Approach 2:
The shaft is designed with multi-functionality: it serves both as a structural support for the cutting part and as a liquid flow generation device through its convex/concave portions. This integrated design eliminates the need for separate fluid management components, maintaining tissue removal function while simultaneously clearing the surgical field of floating tissue.
2Loss of information
If continuous perfusion fluid supply is increased to clear tissue fragments, then surgeon's view improves, but fluid management complexity increases
Solution Approach 1:
The surgical bur itself generates the liquid flow through its convex and concave portions on the shaft, eliminating the need for external pumps or complex fluid management systems. The rotation of the bur automatically creates fluid circulation that clears tissue fragments, improving surgeon's view without increasing device complexity.
Solution Approach 2:
The convex and concave portions on the shaft function as hydrodynamic elements that generate fluid flow through their geometric shape during rotation. This passive hydraulic approach replaces active pumping systems, achieving effective fluid management while minimizing device complexity.
3Productivity
If surgical bur rotates at high speed for efficient tissue removal, then productivity increases, but heat generation and tissue damage increase
Solution Approach 1:
The convex and concave portions on the shaft create continuous liquid flow during rotation, ensuring constant cooling of the cutting part and surrounding tissue. This continuous fluid circulation maintains high rotational speeds for efficient tissue removal while simultaneously preventing excessive heat generation and tissue damage.
Solution Approach 2:
The liquid flow generated by the shaft's convex and concave portions acts as an intermediary between the high-speed rotating cutting part and the surrounding tissue. This fluid mediator transfers heat away from the cutting zone, enabling high-speed operation while protecting surrounding tissue from thermal damage.
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 solution maintains a clear view around the cutting position, enhancing surgical safety, accuracy, and speed by continuously replacing perfusion fluid with new fluid, reducing heat buildup and minimizing tissue damage.
Implementation Method 1
the shaft is formed on the outer peripheral surface on the cutting part side in the axial direction and includes a liquid flow generation part having at least one of a convex part projecting outward in the radial direction or a concave part recessed inward in the radial direction
Implementation Method 2
the perfusion fluid device supplies perfusion fluid towards the cutting part and the liquid flow generation part of the surgical bur
Data Source
AI summary
A surgical bur includes a bar-shaped shaft and a cutting part provided at one axial end of the shaft, which rotates around the axis of the shaft. The shaft is formed on the outer peripheral surface on the cutting part side in the axial direction and includes a liquid flow generation part having at least one of a convex part projecting outward in the radial direction or a concave part recessed inward in the radial direction.