Tissue Extraction Device with Asymmetric Sealing
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Solution Overview
Problem
Existing tissue removal devices are complex, uncompact, and unstable, requiring additional instruments for tissue extraction, leading to complex handling, increased patient risk, and trauma during surgical procedures.
Innovation Solution
A device with a hollow-cylindrical base body and a cutting element surrounded by a serrated edge, featuring a sealing system with a circular peripheral ridge and recess for improved centering and sealing, allowing for single-instrument operation and reduced trauma during tissue extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional tissue removal devices are used with separate gripping instruments, then tissue cylinders can be cut out and removed, but the device structure becomes complex and handling becomes extremely complex
Solution Approach 1:
The patent combines the cutting device and gripping instrument into a single integrated device. The hollow-cylindrical base body with cutting element at the distal end and closure element at the proximal end eliminates the need for separate gripping instruments, directly resolving the contradiction by merging multiple functions into one device structure.
Solution Approach 2:
The device performs multiple functions: cutting out tissue cylinders, holding them, and removing them through the trocar sleeve, all with a single device. The base body, cutting element, and closure element work together to provide multi-functionality, reducing handling complexity while maintaining comprehensive tissue removal capability.
2Reliability
If traditional devices are pulled out through the trocar sleeve to remove tissue, then tissue extraction is achieved, but patient safety deteriorates due to increased trauma risk
Solution Approach 1:
By integrating the gripping function into the base body structure itself, the device eliminates the need to pull separate gripping instruments through the trocar sleeve, thereby reducing tissue trauma and improving patient safety while maintaining effective tissue extraction capability.
3Productivity
If traditional devices require constant insertion and withdrawal through the trocar sleeve, then tissue removal is achieved, but time consumption increases
Solution Approach 1:
The integrated design allows the device to remain in place through the trocar sleeve while performing all cutting and gripping functions, eliminating repeated insertion and withdrawal cycles. This significantly reduces surgical time while maintaining effective tissue removal productivity.
4Device complexity
If simple sealing devices are used, then device compactness is improved, but sealing effectiveness deteriorates
Solution Approach 1:
The sealing device incorporates an asymmetric design with a circular peripheral ridge on one sealing element and a corresponding circular peripheral recess on the other sealing element. This asymmetric geometry provides superior centering and sealing effectiveness while maintaining a compact overall structure, resolving the contradiction between simplicity and effectiveness.
Data Source
Figure 1A~1C
Figure 2
Figure 3A~3D
AI summary
The invention relates to a device for cutting out and removing cylinders of tissue from a tissue, which is located inside a body or joint cavity and/or in or on a wall region thereof, comprising a cutting device (12) with a hollow-cylindrical base body (14), a distal opening (18) on a distal end (16) of the base body (14), and a cutting element (20) surrounding the distal opening (18), further an actuating device (22) for rotating the base body (14) about the longitudinal axis (24) thereof on a proximal end (26), and/or on a region (28) facing the proximal end (26), of the base body (14), and a sealing device (30) for closing and opening a proximal opening (32) on the proximal end (26) of the body (14), and the use thereof.