Surgical Tool Deflector for Offset Bone Resection
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Solution Overview
Problem
Existing surgical tool devices face challenges in aligning rotationally driven tools with the insertion path without jeopardizing delicate organs, blood vessels, or nerves, making it difficult to perform tasks like tissue removal or stabilization in bone tissue, especially in vertebrae regions.
Innovation Solution
A surgical tool device with a guiding part that can be connected axially to an endoscope, featuring a circumferential groove and a rocker-like catch for secure yet easily releasable connection, and a deflector with a laterally bent guiding surface, allowing the tool part to be offset from the axis, combined with a flexible guiding cannula and tool shaft for enhanced flexibility and alignment options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tool is aligned with the insertion path, then the insertion is simpler and more direct, but it jeopardizes delicate organs, blood vessels or nerves over the path
Solution Approach 1:
The patent introduces a deflector component that changes the spatial dimension of tool delivery. The tool shaft is delivered along a straight insertion path, then bent laterally by the deflector to achieve the final offset position. This dimensional change allows the tool to reach the work site without traversing the dangerous alignment path, resolving the contradiction between insertion simplicity and safety.
Solution Approach 2:
The tool delivery system is segmented into distinct functional components: the endoscope for visualization, the guiding part for path definition, the deflector for lateral offset, and the tool shaft for tool delivery. This segmentation allows each component to perform its specific function independently, enabling the tool to be delivered safely to an offset position without compromising delicate structures along the insertion path.
2Object-affected harmful factors
If the tool is offset from the axis to reach the work site, then delicate organs, blood vessels or nerves are protected, but the alignment and positioning becomes more difficult
Solution Approach 1:
The deflector acts as an intermediary component between the straight insertion path and the offset work site position. It receives the tool shaft along the safe insertion path and redirects it laterally to the offset position. This intermediary mechanism simplifies the alignment process by providing a built-in guidance structure that automatically positions the tool correctly without requiring complex manual alignment maneuvers.
Solution Approach 2:
The guiding part and deflector are pre-positioned within the endoscope before tool insertion. This preliminary arrangement establishes the offset path in advance, so that when the tool shaft is inserted, it automatically follows the pre-defined safe path to the work site. This eliminates the need for difficult real-time alignment adjustments during the procedure.
3Measurement precision
If a rigid connection is used between endoscope and guiding part, then alignment precision is improved, but flexibility for insertion and removal is reduced
Solution Approach 1:
The connection between the endoscope and guiding part employs a dynamic locking mechanism rather than a permanently rigid or permanently flexible connection. The guiding part can be locked in place to provide rigid alignment precision during the procedure, but can also be released for easy insertion and removal. This dynamic characteristic resolves the contradiction by allowing the system to switch between rigid and flexible states as needed.
Solution Approach 2:
The connection parameters between endoscope and guiding part are made changeable. The locking mechanism allows the connection stiffness to be adjusted between locked (rigid for precision) and unlocked (flexible for insertion/removal) states. This parameter change capability enables the system to optimize performance for different operational phases without compromising either alignment precision or operational flexibility.
Data Source
AI summary
When processing bone tissue, the work site is often out of alignment with the insertion path of a tool device. A tool device (1) is provided with an endoscope (2), through the working channel (2.1) of which a guiding part (3) and a tool part (5) guided in this can be moved with their distal ends to a distal working area. The tool part (5) has a tool shaft (5.1) with a rotating tool (5.3). In the tool device there is a secure connection between the endoscope and the guiding part, during the task, and, this connection can be established in a simple manner prior to the beginning of the task and it can also be released again in a simple manner after the task ends. The guiding part (3) is able to be connected rigidly with the endoscope (2) axially.