Enveloping Jaw Clamping System for Degradable Occluder Conveyance
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Solution Overview
Problem
Traditional conveying systems are not compatible with degradable occluders and can cause damage, limiting their use in minimally invasive treatments for congenital heart diseases.
Innovation Solution
A head-end enveloping-type clamping and conveying system designed for degradable occluders, featuring a jaw part with uniform-teeth or crocodile-tooth designs, a push steel cable, adjustment wire, and connecting tendon for secure clamping, loading, conveying, and releasing, ensuring stability and safety during treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional threaded connection or stuck connection conveying systems are used with degradable occluder, then the conveying system can be simple in structure, but it will cause great damage to the degradable occluder
Solution Approach 1:
The conveying system is divided into multiple functional modules: a delivery catheter for navigation, a clamping mechanism with jaws for secure holding, and a release mechanism for deployment. This segmentation allows each component to be optimized for its specific function while minimizing damage to the degradable occluder during conveying and deployment
Solution Approach 2:
The patent introduces a specialized clamping mechanism with jaws as an intermediary between the conveying system and the degradable occluder. This intermediary component provides a gentle yet secure grip on the occluder, avoiding direct damage from traditional threaded or stuck connections while maintaining stable conveying
2Object-affected harmful factors
If a clamping mechanism with multiple components is used to securely convey the degradable occluder, then the damage risk to the occluder is reduced, but the device complexity increases
Solution Approach 1:
The clamping mechanism features nested components where the jaws can be retracted into the delivery catheter when not in use, and the occluder is held within the formed jaw structure. This nesting approach consolidates multiple components into a compact integrated unit, reducing operational complexity while maintaining secure clamping capability
Solution Approach 2:
The clamping mechanism employs dynamic elements including movable jaws that can open and close, and a release mechanism that transitions from a clamped to an released state. This dynamic design allows the complex mechanism to perform multiple functions (clamping, conveying, securing, and releasing) through coordinated movement of its components, making the complexity manageable and controllable
3Object-affected harmful factors
If the jaw part uses a smooth cylindrical wall design, then the contact area with the degradable occluder is large and damage is avoided, but the clamping force and stability are insufficient
Solution Approach 1:
The jaw part combines a smooth cylindrical wall design for overall contact with localized teeth or ridges at specific positions. The smooth portions provide large contact area and damage avoidance, while the localized teeth enhance friction and prevent slippage, achieving both damage protection and secure clamping through differentiated local properties
Solution Approach 2:
The jaw part is constructed using composite structural features combining smooth surfaces with textured elements (teeth or ridges). This composite design integrates the damage-avoiding properties of smooth contact with the grip-enhancing properties of localized friction surfaces, providing both protection and stability
4Adaptability or versatility
If a long-distance control mechanism with push steel cable and connecting tendon is used, then the flexibility and safety of treatment are improved, but the device complexity and difficulty of operation increase
Solution Approach 1:
The patent replaces complex mechanical linkages with a cable-driven control system using push steel cables and connecting tendons. This substitution simplifies the transmission of forces and movements from the operator's hands to the distal components, reducing mechanical complexity while maintaining precise long-distance control capability
Solution Approach 2:
The push steel cable and connecting tendon act as intermediaries that transmit control forces over long distances with minimal loss. These intermediary elements allow the operator to control the clamping and release mechanisms at the distal end without direct mechanical connection, improving safety and flexibility while keeping the control interface simple and intuitive
Data Source
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AI summary
The present application discloses a head-end enveloping-type clamping and conveying system, characterized by comprising a jaw part and a pushing part, the pushing part comprises a push handle, a push steel cable, a core shaft, an adjustment wire, a pull wire loader, and a connecting tendon (6); one end of the push handle is fixedly connected to one end of the push steel cable, the outside of the push steel cable is provided with the pull wire loader for pushing the push steel cable into a sheath, the interior of the push handle is connected to one end of the core shaft, and the other end of the core shaft penetrates the interior of the push steel cable and is connected to the connecting tendon, and the connecting tendon is connected to the jaw part for clamping and releasing an occluder. The present application can be used in cooperation with a degradable occluder to complete the functions of clamping, loading, conveying, locking, release, recovery, etc. of the degradable occluder. It also has good sheath passing ability and good clamping force and stability for degradable occluder. It has high firmness and is easy to be pushed, released and conveyed, and has strong sheath passing ability and high compatibility with products.