Multi-Channel Cannula With Adjustable Guide Plate
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Solution Overview
Problem
Minimally invasive surgical devices in prior art lack the capability for simultaneous operation of multiple channels and devices due to the large size of the endoscope occupying the entire channel, limiting the use of additional instruments during procedures.
Innovation Solution
A multi-channel working cannula design featuring a main catheter with an adjustable distance to accessory catheters, utilizing a guide plate with elongated holes and a T-shaped mounting block for secure attachment, allowing for flexible positioning and detachment of accessory catheters without interfering with the main channel's function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single guide tube is used in the expansion tube, then the structure is simple, but only one instrument can be inserted at a time and multiple devices cannot operate simultaneously
Solution Approach 1:
The single guide tube is segmented into multiple guide tubes (first guide tube, second guide tube, etc.), each capable of independently receiving different instruments. This segmentation allows multiple devices to operate simultaneously through separate channels while maintaining the overall simplicity of the expansion tube structure.
Solution Approach 2:
The guide tubes are arranged in different spatial dimensions and orientations within the expansion tube. The first guide tube extends along a first direction while the second guide tube extends along a second direction that is not parallel to the first direction, enabling multi-directional instrument access and simultaneous operation.
2Adaptability or versatility
If the endoscope is placed into the expansion tube, then observation is enabled, but the large size of the endoscope occupies the entire channel and prevents other devices from being placed
Solution Approach 1:
The working space is segmented into multiple independent guide tubes, each providing a separate channel for instrument insertion. The endoscope can occupy one guide tube while other guide tubes remain available for additional devices, effectively dividing the limited space into functional segments.
Solution Approach 2:
Multiple guide tubes are nested within the expansion tube structure, with each guide tube containing its own instrumentation channel. This nested arrangement allows the endoscope to be positioned within one guide tube while other guide tubes maintain their independent working spaces for additional devices.
3Measurement precision
If the abrasion drill is inserted along the guide tube for bone grinding, then bone grinding is enabled, but the drill is in a blind grinding state and cannot be accurately aligned with the target area
Solution Approach 1:
The guide tube and endoscope are merged into a coordinated system where the endoscope provides visual guidance along the same pathway as the abrasion drill. The guide tube serves as a common channel that first receives the endoscope for alignment verification, then receives the abrasion drill for precise bone grinding at the visually confirmed target location.
Solution Approach 2:
The endoscope is inserted and positioned along the guide tube before the abrasion drill is inserted. This preliminary action allows the surgeon to visually identify and confirm the target bone area through the endoscope, establishing accurate alignment before the actual bone grinding operation begins.
4Productivity
If the abrasion drill is removed from the guide tube and then the endoscope is inserted for observation, then observation is enabled, but the operation procedure becomes cumbersome and prolongs operation time
Solution Approach 1:
The guide tube system is designed to dynamically accommodate different instruments in sequence. The guide tube maintains a ready state that can quickly transition from holding the abrasion drill to receiving the endoscope, and vice versa. This dynamic design allows for rapid instrument exchange without cumbersome removal and reinsertion procedures, improving operational efficiency.
Data Source
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AI summary
This application provides a multi-channel working cannula and relates to the technical field of medical device. A main catheter and a plurality of accessory catheters are included, and the distance between the main catheter and the accessory catheters is adjustable; one end of the main catheter is provided with a guide plate, the guide plate is provided with a first through hole, and the main catheter is inserted into the first through hole; the guide plate is provided with at least one elongated hole, one end of the accessory catheter is provided with a mounting block, the length of the mounting block is less than that of the elongated hole, and the mounting block is inserted into the corresponding elongated hole; the mounting block is provided with a second through hole, and the accessory catheter is inserted into the second through hole; by arranging the accessory catheter on the outside of the main catheter, that is, there is no interference to the function of the original main channel; it needs only to move the mounting block along the length of the elongated hole to adjust the distance between the accessory catheter and the main catheter, preventing the devices within the main catheter from interfering with the devices in the accessory catheter; when it is needed to increase the accessory catheters, the accessory catheters can be inserted, and the accessory catheters can be removed when they are not needed, making the operation more flexible and convenient.