Knot-Based Tension Thread Implant Delivery Device
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Solution Overview
Problem
Current medical implant delivery devices lack an efficient mechanism for folding and unfolding implants using tension threads, and existing solutions often require complex mechanisms or devices that may fail or require precise tolerances.
Innovation Solution
A medical implant delivery device utilizing a tension thread system with a knot configuration that can be released by pulling a string, allowing for safe and temporary connection and easy removal of the threads from the implant, and incorporating a self-balancing design for independent tension thread actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex mechanisms are used for folding and unfolding implants, then the implant can be deployed, but the device complexity increases and reliability decreases due to more potential failure points
Solution Approach 1:
The implant delivery system is segmented into distinct functional components: the implant itself, tension threads for folding/unfolding, a releasing string for knot manipulation, and a delivery catheter. This segmentation allows each component to perform its specific function independently, reducing overall system complexity while maintaining reliability.
Solution Approach 2:
The knot mechanism is designed to be self-operating through the releasing string. By pulling the releasing string, the surgeon directly manipulates the knot to transition between secured and released states without requiring additional actuating mechanisms, motors, or complex control systems. This self-service approach minimizes device complexity while ensuring reliable operation.
2Reliability
If precise tolerance mechanisms are used for thread connection, then the implant can be securely held, but the manufacturing precision requirements increase and device complexity increases
Solution Approach 1:
The mechanical connection between the tension threads and implant is replaced with a knot-based system. Instead of requiring precisely engineered interfaces, slots, or clamps with tight tolerances, the knot provides a secure mechanical interlock through friction and geometry. This substitution dramatically reduces manufacturing precision requirements while maintaining reliable connection.
Solution Approach 2:
The knot acts as an intermediary element between the tension threads and the implant. Rather than directly connecting threads to the implant with precision-machined interfaces, the knot serves as a flexible mediator that secures the threads through tying, accommodating variations in thread diameter and implant surface geometry without requiring tight tolerances.
3Ease of operation
If traditional cutting methods are used to remove threads, then thread removal is possible, but the device complexity increases and the procedure becomes more time-consuming
Solution Approach 1:
Instead of using cutting mechanisms to remove threads, the system inverts the approach by designing the knot to be untied and threads to be pulled out through the same opening they were inserted through. This inversion eliminates the need for cutting tools, reducing device complexity and procedural time while maintaining complete thread removal capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables safe, efficient folding and unfolding of implants with minimal device failure risk, MRI compatibility, and easy thread removal without cutting, providing a compact and reliable mechanism for implant deployment.
Implementation Method 1
The knot is configured such that it can be released or opened upon pulling the releasing string
Data Source
AI summary
The present invention relates to an implant delivery device (100) for folding or unfolding at least one medical implant (300) by using at least one tension thread (11, 11'), wherein the implant delivery device (100) includes a shaft (1) including a reception area for receiving the implant (300), a tensioning device for altering a shape of the foldable and/or unfoldable implant (300) by the tension thread (11, 11'), and a knot (207) for tying at least one section of at least one of the tension threads (11, 11'). The present invention further relates to a method.