Implantable Cuff Integral Closure Mechanism
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Solution Overview
Problem
Existing implantable cuffs face issues with suture-based closure mechanisms, which can lead to tissue growth, inflammation, cuff failure, and complications due to suture breakdown, requiring specialized tools and skills for implantation and removal, and are costly for healthcare systems.
Innovation Solution
An implantable cuff with a biocompatible and durable closure mechanism that uses a semi-flexible hinge and interdigitating closing components with built-in locking units, allowing for easy opening and closing without specialized tools, minimizing tissue growth and cuff re-opening, and ensuring a smooth, continuous surface for tissue interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sutures are used to close the cuff, then the cuff can be sealed, but tissue growth may occur around the suture material and connective tissue may grow inside the cuff
Solution Approach 1:
The patent removes the suture material entirely from the cuff closure system. Instead of using separate suture threads to tie the cuff, the cuff is designed with an integral closure mechanism where the cuff material itself forms the sealing structure through interdigitating edges with friction surfaces, eliminating the harmful foreign body (suture) that causes tissue growth and inflammation.
Solution Approach 2:
The closure function is merged into the cuff structure itself. The cuff includes closing components with friction surfaces that are integral to the cuff body, allowing the cuff to seal itself without external suture material. This integration eliminates the need for separate suture elements that cause adverse tissue reactions.
2Reliability
If the number of closing sutures is increased to improve cuff sealing, then sealing reliability improves, but the complexity of implantation increases and more opportunities for tissue growth and complications arise
Solution Approach 1:
The patent extracts the multiple suture elements and simplifies the closure system to a single integrated mechanism. Instead of requiring multiple separate suture passes and knots, the cuff uses interdigitating closing components with friction surfaces that engage in a single simplified action, dramatically reducing procedural complexity while maintaining sealing reliability.
Solution Approach 2:
The patent concentrates the sealing function at specific localized friction surfaces on the closing components rather than distributing it across multiple suture points. The interdigitating edges have optimized friction surfaces at key locations that provide sufficient sealing force locally, eliminating the need for multiple distributed sutures.
3Reliability
If sutures are used to close the cuff, then the cuff can be sealed, but the edges of the cuff may overlap each other resulting in tissue damages inside the cuff
Solution Approach 1:
The patent applies friction surfaces at specific localized regions on the closing components to control the interaction between cuff edges. This localized friction engagement prevents uncontrolled edge overlap and ensures that the cuff edges meet in a controlled manner without creating damaging concentrations of stress or compression on the enclosed tissue.
Solution Approach 2:
The closing components with friction surfaces provide controlled, progressive engagement of the cuff edges during closure. The friction mechanism allows the edges to come together in a controlled sequence rather than forcing sudden overlap, dynamically managing the closure process to prevent tissue damage.
4Duration of action of stationary object
If non-absorbable suture material is used to maintain cuff closure for extended periods, then cuff stability is improved, but the suture material retains contaminants and serves as a focal point for connective tissue growth
Solution Approach 1:
The patent removes all suture material (both absorbable and non-absorbable) from the cuff system. The closure function is achieved through the integral closing components with friction surfaces that are part of the cuff structure itself, eliminating the foreign body that retains contaminants and induces connective tissue growth while maintaining closure durability through the friction-based locking mechanism.
Data Source
AI summary
An integral closure mechanism is described to be used for implantable cuffs of tubular shapes. This mechanism relates to cuffs used to surround internal organ or tissue in animals and human for specific clinical applications or for evaluation purposes in biomedical research. The closure mechanism is designed to provide a safe and reliable way in keeping the cuff in its original dimension around biological tissue, and to assist in surgical implantation by introducing a convenient and less time-consuming method to secure the cuff at the surgical site. To eliminate distortion of the implantable cuff by having an integral closure mechanism, the underlying body tissue is better protected from damages caused by compression of the cuff and from connective tissue overgrowing at the distorted sites. Thus, therapeutic attempts by using implantable cuffs may reach their desired potential in various applications.