Counter-rotating Tissue Cutter Eliminates Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tissue removal devices require additional instruments for gripping and stabilizing tissue during cutting, leading to complex, time-consuming, and potentially damaging procedures due to tissue deformation and self-rotation issues.
Innovation Solution
A device with two cutting elements that rotate in counter-rotation, eliminating the need for additional gripping instruments by canceling out forces and moments acting on the tissue, allowing for precise and gentle removal without deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single hollow-cylindrical cutting device is rotated to cut out tissue cylinders, then the cutting function is achieved, but the tissue is deformed or made to rotate of its own accord, requiring additional gripping instruments
Solution Approach 1:
The single cutting device is divided into two separate cutting devices (inner cutter and outer cutter), each with its own cutting element. This segmentation allows the cutting function to be distributed across multiple components, eliminating the need for additional gripping instruments while reducing overall device complexity
Solution Approach 2:
The inner cutting device is received coaxially by the outer cutting device, with the inner cutter positioned inside the outer cutter. This nested configuration allows both cutting devices to work simultaneously without requiring separate gripping instruments, simplifying the overall device structure while maintaining the cutting function
2Productivity
If a single cutting device is used to punch out tissue cylinders, then the cutting function is achieved, but additional gripping instruments are required to deform or fix the tissue, making the procedure time-consuming
Solution Approach 1:
The cutting function is segmented into two separate cutting devices working in coordination. The inner cutter and outer cutter each perform cutting actions that together eliminate the need for tissue deformation by gripping instruments, reducing procedure time while maintaining ease of handling
Solution Approach 2:
The functions of multiple cutting devices are merged into a single integrated apparatus where the inner and outer cutters work together. This combination achieves the tissue cutting function without requiring additional gripping instruments, improving productivity while keeping the device easy to handle
3Reliability
If a hollow-cylindrical base body is rotated to cut out tissue cylinders, then the cutting action is achieved, but the tissue undergoes deformation or self-rotation, reducing patient safety
Solution Approach 1:
The single rotating cutting device is segmented into two separate cutting devices (inner and outer cutters) that work in coordination. This segmentation eliminates the harmful effect of tissue deformation and self-rotation while maintaining reliable cutting action, thereby improving patient safety
Solution Approach 2:
The inner cutter and outer cutter are positioned and operated to counterbalance each other's mechanical effects on the tissue. This counterbalancing arrangement prevents tissue deformation and self-rotation, eliminating harmful factors while ensuring reliable cutting and improving patient safety
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C~3F
AI summary
The invention relates to an apparatus for cutting out and removing tissue cylinders from a tissue located within a cavity of the body or a joint and/or in or on a wall section thereof. Said apparatus comprises at least two, especially two cutting devices (12, 12'), each of which has a hollow cylindrical base (14, 14'), a distal opening (18, 18') at a distal end (16, 16') of the base (14, 14'), and a cutting element (20, 20') that surrounds the distal opening (18, 18'). The at least two cutting devices (12, 12') are disposed inside each other and can be rotated relative to one another. The apparatus further comprises at least one driving device (22) for rotating the respective base (14, 14') of the at least two cutting devices (12, 12') about the longitudinal axis (24, 24') of the base (14, 14'). The invention also relates to the use of said apparatus.